Illustrations of the recent conchology of Great Britain and Ireland, with the description and localities of all the species, marine, land and fresh water

58 MOLLUSCA. [GASTEROPODA striro formcd by continuous links, which, howevcr, can only be scen' by thc aid of a strong lcns. Lcngth one-cighth of an inch ; brcadth somewhal lcss. Found in I3igberry Bay, Devonshire, and on the coas!. of Pembrokcshire; it is also mel with on the Dorsetshire and Northumbcrland coasts, Frith of Forth, ancl Frith of Clyde. 3, l3uLLñ!A. PUNCTATA, pi. XIX, f. 45, 46; ami Supple- mentary platc, f. 1, 2. Bull(IJa pune/ata, Turton, llfag. Nat. Hist., VII, p. 358; Bulla ¡nmtata, Adams, Linn. Tr., V, p. 2, pi. 1, f. 6, 7, 8. "Shell O\'al, transparent, with transvcrse lines of distinct, impressed dots; crown canaliculate. "Thc accurate obscrvations of Mr. Clark, who favourecl us with specimens, harn fully distinguished this species from Bulla catena of Montagu. The shell is somcthing smaller, of a more oval shape, with the crown more ílattened; and, instead of oval, raised, chain-like points, which form the lines in B. catcna, the lines in this spccics consist of distinct imprcsscd dots. "Mr. Clark has also bcen ablc to asccrta;n, that, in B. catcna, the animal is of a ycllowish-whitc, ami furnishecl with a gizzarcl; bul that the animal of B. ¡nmctata is of a blackish-gray colour, and clestitutc of .my trace of gizzard. "Found by lVIr. Clark, ncar Exmouth."-Turton. First discoverccl on the coast of Pcmbroke, by llfr. Adams. GENUS G.-UTmcuLus.-Ilrown. Shcll small, oblong-ovatc, or subcylindrical; prol'idcd with a visible, vcry short spire, with rathcr inílatcd volutions; aperturc ns long as thc bocly volution, always contractcd above, and widc bcneath. Seclion I.-Body subcyli11clrical; spire a littlc1n·omincnt. l. UT111cuLus l'LtCATus, pi. XIX, f. 1, 2.-First Ed., pi. 19, f. ), '.l. Shell rather strong, smooth, clull milk-white, and subopaquc; hody vcry largc, subcyliudrical, with ncarly obsolcte, longitudi- nal wrinkles, or lines of growth; spirc small, consist.ing of thrcc somcwhat inllatcd aml promincnt rnlutions, wcll scparatccl by thc sutura! linc, thc lower one with a strong thread-like line al its base, which extcmls half way round its circumfcrence; apex rathcr obtuse; apertm·c narrow, as long as the body, contracted above, somewhat compressecl in the middle, ancl wide bclow, ami tcrminating in a ronndecl base; outcr lip thin, slightly in- flectecl toward; the centre; inner lip a little thickenecl on the columella, and ncar its base proridecl with two oblique, almost ohsoletc folcls. Lengt.h one ami a half eighth of an inch ; día- meter about half its length. Discoverecl al Dunbar, by General Bingham. I founcl a variety oí this species al Kirkcaldy, Fifcshire, with thc volutions oí thc spire harclly risible. 2. Urn1cu1.us Dtscons, pi. XIX, f. 3, 4.-First Ed., pl. 38, r. a, -1. Shell modcrntely strong, subcylindrical, white, ancl slightly glossy, with obsolete, longitudinal lines of growth; body large; spire small, ronsisting of three inllatccl, roundecl, well defincd \'Olntions, tcrminating in an obl use apex; apertnre long, narrow, being about three-fourths the lcngth of the body, straitened abol'e, sligluly compressed in the centre, and dilated towards the base ; outer lip strong, and rounded on the margin; pillar lip a little reflect.ed , ami thickened 011 the columella. Lcngth a sixth of an inch; cliameter somewhat more than half its length. Found al Dunbar, by General Ilingham. This species dilTers from the preccding, in being broader in proportion to its length, all(I somewhat more inllated, ancl is destitute of the thread-like line which invests !he base of the lower volution of U. plicatus, as well as the plaits on the lower part of the C!)lumella, ancl in the aperture being shorter. 3. UTRI~ULUS onTusus, pi. XIX, f. 5, 6.-First Ed., pl. 38, f. 5, 6. Bulla obtusa, Montagu, p. 223, pl. 7, f. 3; Maton and Rackett, p. 128; Ilrown, Ency. Ilrit., VI, p. 434; Ib., Wcr- nerian Mcm., II, p. 517; Bulla perpci-am, ,valker, pi. 3, f. 62; Retusta obtusa, Brown, Popular Ency., II, p. 378, pi. 17, f. 110. Shcll subcylindrical, moderatcly strong, white, opaque, and longitudinally wrinklcd; bocly long; spire short, consisting of three somcwhat depresscd volutions, terminating in an obtuse apex; aperture as long as the body, straitened abovc, and cx- panding below, tcrminating in a rounclecl base; outcr lip thin at the cdge, somewhat compressed in the middlc; inner lip- thickcncd, slightly spread over the base of the columclla. Length nearly a quarter of an inch; diamcter about half its length. Founcl on thc coasts of Devonshirc, Dorsetshire, Northum- berlancl, and Wales; ancl at Portmarnock, Ireland. 4. Urn1cuLus LIMA, pl. XIX, f. 39, 40.-First Ed., pi. 38, f. 39, 40. Shcll oval, oviform, rather strong, milk-whitc; body very large, much inílatcd; spire exccedingly small, scarcely elevated abovc !he body, and consisting of two slightly inllated volu- tions; aperture oblong-oratc, occupying about three-fourths of the length of thc body, contraclccl all(I pointed above, rapidly expanding below, and terminating in a well rounded base; outcr lip strong, and ílattened on the edge ; pillar lip much reílected on the columella; whole surfacc covercd with very numerous, oblong punctures, with their edges clevated, set in regular series of transverse lines, gi\·ing it much thc appearance of a file when vicwcd through a strong lens. Length a quarter of an inch; breadth an eighth. This beautiful little shell was discovered al Greenock, by my friend Stewart Ker, Esq., and is in his cabinet. Scction II.-Bocly muclt injlatccl and viti-cous, witli tlu: spirc hm·dly p1·otruding bcyoncl thc bocly. 5. ÜTmcu1,us MI:--uTus, pi. XIX, f. 7, 8.-First Ed., pi. 38, f. 7, s. Shell ovale, exceedingly thin, rliaphanous, and white, but 11ot glossy; body \'ery large, greatly inllated ; spire excecdingly small, consisting of a single, bluntcd, papillary \'Olution; aper- turc \'Cry wide, oblong-ovate, somewhat narrowed both abovc ami at. the base, which is in conscc¡ueuce a lit t le pointed; outer lip cxtending higher than the apex, arcnatcd, sharp, ami slightly inílcctecl on thc margin; pillar lip a little rellerted on the colu- mella, pro<lncing a subnmbilicns bchind. Length one-sixtccnth of an inch; diameter not <1ui1e ~o 111ucl1. Fonnd al Dunbar, hy General l3iugham.