GASTROPODA. 3 



(14 '5 mm. iu length), similar iu character, was obtaiued oti'IIut Point, 11th November, 

 1902, which probably belonged to a more or less adult specimen of this species. 



The genus Boreofusus of Sars is a synonym of Troschelia, and possibly Buccino- 

 fusus of Conrad, which has priority, may also be congeneric. 



Trophon longstaffi. 

 (PL I., figs. 3-3d.) 



Shell ovately fusiform, white, rather thin, longitudinally delicately plicate ; whorls 

 6-7, the two apical forming the protoconeh (fig. 3b.) globose, smooth, glossy ; the rest 

 convex, rather shouldered above, separated by an oblique deep suture, ornamented with 

 numerous thin lamellae, which are directed forward, and often somewhat produced at the 

 upper part, especially upon the body -whorl. They vary in number from 10 to 20 upon 

 the last whorl, but generally average about 16. The surface is also sculptured w^ith 

 very fine spiral striae both between the lamellae and upon their upper surface, but their 

 lower is smooth. The last whorl is contracted below and produced into a short oblique 

 snout which is directed towards the left. The aperture is pear-shaped, with the canal 

 considerably longer than the spire, smooth and white within. The outer lip in the most 

 adult specimen is a little thickened within, sharp at the edge, and somewhat patulate 

 and united above, with a distinctly defined callosity which covers the columella. The 

 anterior canal is short and oblique. 



Length, 41 millim. ; greatest diameter, 25 ' 5 ; aperture, with canal, 25 millim. long, 

 12 broad. 



Flagon Point, 1 mile N. of ship, 20 fathoms ; holes 4, 12, in 25-41 fathoms. 



The animal externally appears to be normal, the tentacles are short, compressed, 

 pointed at the tip, with the minute sessile eyes situated about midway upon the outer 

 edge. The operculum (figs. 3c., 3d.) is elongate-ovate, rather thin, of a reddish horn 

 colour, slightly convex externally, marked with distinct lines of growth from the apical 

 nucleus, and also exhibiting a few arcuate rays, which curve from the apex to the inner 

 margin. The lower concave surface is finely wrinkled, with a broad, glossy, reddish and 

 somewhat thickened margination on the outer edge, and is dull upon the rest of the 

 surface. 



This species does not compare closely with any of the described forms. Perhaps 

 the Patagoniau T. laciniatus is its nearest relation. It is, however, rather diff"erent in 

 form, its whorls are broader, and the lamellae are not produced above into hollow spine- 

 like projections. The aperture also is devoid of the orange or brown colour which 

 distinguishes the South American shell. 



Trophon coulmanensis. 

 (Plate I., figs. 4-4b.) 

 Shell fusiform, turreted, white within and without, ornamented with somewhat 

 distant thin lamellae, about ten on a whorl, which are produced at the upper part or 



^ A R V;:,^ 



'V, . f C,. i ■. 



