OCR Text |
Show 1^83.] THE 'TRITON ' EXPEDITION. 395 4. TROPHON CARINATUS1, Jeffreys. (Plate XLIV. fig. 4.) S H E L L distinguishable from T. clathratus in having a prominent keel in the middle of each whorl; the laminar ribs are fewer and obtusely angulated; the spiral striae, which cover the interstices of the ribs, are numerous, regular, comparatively strong, and flexuous or curved : colour white : inner lip glazed and lustrous. L. (if perfect) 0*6, B. 0*25. An imperfect but characteristic specimen from Station 13, 570 fathoms. 5. Fusus SABINI, (sabinii) Gray. (Plate XLIV fig. 5.) Buccinum sabinii, Gray in Suppl. to App. of Parry's First Voyage, p. cxl (1824). S H E L L forming a somewhat short spindle, rather thin, semi-transparent and rather glossy : scidpture, numerous fine and threadlike spiral striae, of which there are from 20 to 30 on the last, and 8 to 12 on the penultimate whorl; these are crossed by microscopic and far more numerous striae in the line of growth : colour under the epidermis chalky-white : epidermis pale yellowish-brown, filmy, and easily removed ; it is fibrous towards the mouth : spire tapering to a blunt point; apex irregular, sometimes flattened at the top, but occasionally twisted : whorls 6-7, moderately convex; the last occupies rather more than two thirds of the shell when placed with the mouth upwards : suture rather deep : mouth pear-shaped, acutangular above; length (including the canal) exceeding the rest of the spire ; inside slightly notched by the impression of the spiral striae : canal shortish, turning somewhat abruptly to the left, equally wide and open throughout, and ending in a large and obliquely curved notch : outer lip flexuous aud sharp-edged : inner lip polished by the continual attrition of the foot: pillar flexuous, obtusangu-lar at its junction with the canal: operculum triangularly oval, strong, yellowish-brown or light horn-colour, marked with close-set lines of growth ; nucleus terminal on the inner side, and falciform. L. 1*75, B. 0*75. Many living specimens from Stations 8 and 9, in 608 and 640 fathoms. Having carefully compared these and other specimens with the types of Reeve's Fusus tortuosus in m y possession from the collection of the late Admiral Sir Edward Belcher, I must adhere to my opinion expressed in the 'Annals of Natural History' for April 1877, that both belong to one and the same species. Sipho tortuosus of G. O. Sars is a different species, and is the Tritonium turritum of M. Sars ; m y Fusus attenuatus is not a variety of that species. Besides the numerous localities there given, I am enabled, through the kindness of m y friend Herr Friele, to add the Norwegian Arctic Expedition, Station 324, 123 fathoms, as well as the cruise of the ' Knight Errant/ in 540 fathoms. Gray contrasted his species with F. gracilis (his Buccinum corneum), and said it was " not so long and slender, 1 Keeled. |