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

558 CATALOGUE — SHKLLS. or right-handed rope, and those of the two lower carince ar^ in the opposite direction, or like what is termed a hawser-laid rope. Between these nodulous carince are elevated lines, and the base is very strongly striated. Found in deep water in the Bay of Valpa- raiso. Dead shells of this species are occasionally found thrown upon the beach, near the Almendral. 56 TURRITELLA NODULOSA. T. testa elongato-turritd ; anfractihus striatis ; striis duabus maximis subnodulosis ; long.\\\-, lat. -^^ Jere ; poll. Habitat ? Mus. Brit., nost. The two large stricB, which are remarkable for the nodules, are not far from the middle of each whorl, and generally are nearer the upper suture : of these the lowest is the largest. '57. MUREX SALEBROSUS. M. testa elongaio-ovatu, subalbidd, Jasciis fuscix, epidermide cinered ; spird brevi ; atifractibus angulatis, nodulosis ; aperturd oblongd ad basin angustd, castaned, intus alba ; labro interne deniiculato, dentibus obtusis albis ; columelld redd, Icevi ; canali hrevi long. 3-j'',. ; lat. 2; poll. Habitat ? Mus. nost., Geo. Sotaerby. This species approaches Murex vitulinus very nearly ; the body- whorl is very much elongated, and the nodules which mark the angles of the whorl are formed of the more elevated pai'ts of what may be termed coarse longitudinal plaits. 58. Murex Rhodocheilus. M. testd ventricosd, albd, Jasciis elevatis striatis ; septemjariam va- ricosd, varicibus roseis dentictdatis ; aperturd rotundatd, rosed, in- tus albidd ; labri margine asperrime denticulate ; caudd mediocri, sub-recurvd ; long. 3 1-| ; lat. 2^'^ ; poU. Habitat ? Mus. nost. 59. Triton ranelliformis. T. testd ovato-Jusiformi, subdepressd, albidd Jusco Jasciatd, costatd ; costis granulosis, interstitiis striatis ; aperturd subrotundd, albidd ; columelld subrugosd ; labro interne obtuse denticulalo ; margine undulato ; epidermide viridijuscd, scabrd ; long. S-^^ ; lat. \^ poll. Habitat ad Sinum Pefias et oram occidentalem Americce meri- dionalis. Mus. Brit., nost., Brod.