326 Dv. Gwyn Jeffreys on 



1450 fms. (a fragment) ; Holsteinborg, 35 fms. Greenland 

 (Fabricius and others). Wellington Channel (Belcher) ! Gulf 

 of St. Lawrence (AVhiteaves) . Spitzbergen (Torell) ! Iceland 

 (Morch), Norway (Koren, Friele). Fossil : Wexford (Sir 

 Henry James) ; Lancashire " drift " (Darbishire) ; possibly 

 also from the " Middle Glacial " formation, as T. medigla- 

 cialis of S. V. Wood. 



It is the Tritonium craticulatum of Fabricius, but not 

 Murex craticuJatus of Linn^, which is another species of Tro- 

 phon. Our 2\ barvicensis is allied to the present species, as 

 well as to T. muricatus. 



Fusus attenuatus'^, Jeffr. 

 Fiis7ts atteniiotm, Proc. Hoy. Soc. vol. xviii. no. 121 (1870), p. 434. 



Shell spindle-sliaped, solid, opaque, rather glossy ; the 

 periphery is bluntly angulated in a half-grown specimen : 

 scuJjyture consisting of numerous spiral impressed lines, and of 

 minute close-set and slight lines of growth : colour ivory-white : 

 ejndermis thin and smooth, pale yellowish-white : spire long 

 and slender, tapering to a very blunt and regularly spiral 

 point, which is not mamillar or twisted : ivhorls 8-9, com- 

 pressed, especially below the suture ; the last occupies about 

 two thirds of the shell, when viewed with the mouth upwards; 

 the topmost whorls are nearly equal in breadth : suture dis- 

 tinct, but not channelled nor deep ; it is defined by a thickened 

 edge : mouth oblong, acute-angled above ; its length, including 

 that of the canal, is about two fifths of the shell : ca7ial open, 

 rather long and straight : outer lip thin, smooth inside : inner 

 lip filmy : ptillar flexuous : operculum ear-shaped, yellowish- 

 brown, curved on the outer side, and incurved towards the 

 base on the inner side; it is marked with a few slight im- 

 pressed lines, which radiate upwards from the terminal nucleus. 

 L. 2-25. B. 0-85. 



Station 13, 690 fms. (a dead specimen). ' Porcupine' Ex- 

 pedition, 1869, off the west of Ireland, 1180-1215 fms. (young 

 specimens and a fragment) ; Bay of Biscay, 1207 fms. (one 

 living and one dead specimen). 



My description is chiefly taken from the living ' Porcupine ' 

 specimen. 



Differs from F. propinqaus and its variety turrita in being- 

 much larger, having a slighter sculpture, a smoother and 

 thinner epidermis^ a more tapering spire, compressed whorls, 

 a straighter and more open canal, and a more cylindrical and 

 blunt apex. 



• iJiniinishjng, as regards the spire. 



