Narrative of the surveying voyages of his majesty's ships Adventure and Beagle (vol.1): between the years 1826 and 1836 : describing their examination of the southern shores of South America, and the Beagles's circumnavigation of the globe

552 CATALOGUE SHELLS. Habitat ad Portum Praya. (Cape Verd Islands.) Mus. Brit., nost. 27. BuLiNus Gkavesii. B. testa suhventricosd, loiigitudinaliter suhrugosd, sub-albidd, fusco- maculatd, spird longitudinaliter striatd ; long. 1| ; lat. ^| paulo minus ; poll. Habitat ad Valparaiso. Mus. nost. I have named the shell after my shipmate and friend, Lieutenant Thomas Graves, whose zeal and assiduity in assisting and increasing my collections of Natural History was as unwearied as the alacrity and ability which he displayed in the primary and more important objects of the voyage, of which, in his Majesty's ship Adventure, he filled the appointment of assistant surveyor. To Lieutenant Graves I am principally indebted for my land-shells, and I therefore take the opportunity of recording the valuable assistance he rendered me during the whole period of his servino- under my command. 28. BuLiNus Gravesii, var. B. iestd subpyramidali, scabrd, albidd, aliquando lineolis raris j epidermide lutescente ; long. 1^%- ; lat. ii- paulo plus. poll. Habitat ad Valparaiso. Mus. Brit., nost., Brod. This is certainly a variety of No. 27, Bulinus Gravesii. 29. Bulinus dentatus. B. iestd cylindraced, punctatd, sub-diaphajid, fusco macidatd ; aper- turd dentatd, clausiliam mentie7ite ; long. ^^ ; lat. -J^ ; poll. Habitat ad oras Brasilia (St. Catherine). Mm*. Brit., nost. 30. Bulinus lutescens. — No. 140. MSS. B. testd obovatd, vetitricosd, subscabrd, lutescente ; long. 1 J- ; lat. H; poll- Habitat ad Maldonado (Gorriti). Mus. Brit., nost., Brod. 3L Bulinus corrugatus. — No. 941 MSS. B. testd subalbidd, transversim et longitudinaliter rugoso-striatd, maculis fuscis, obsoletis ; aperturd purpurasccnte ; columelld nigricante jmrpured ; long. 1| piaulo plus; lat. \^ ; poll. Habitat ad Concepcion. Mus. Brit., nost., Brod. The body-whorl of the older specimens of this shell is rather roughly striated or wrinkled, the last but one slightly so, and the remaining whorls are quite smooth. The colour is whitish, with