1883.] THE 'TRITON ' EXPEDITION. 397 



are also occasional but irregular lines of growth : colour white, with 

 a slight tint of yellow : epidermis inconspicuous : spire elongated, 

 tapering to a bulbous point ; apex sliglitly twisted : whorls 5-6, 

 convex ; the last occupies rather more than two thirds of the shell : 

 suture deep : mouth oblong, inflected above ; length (including the 

 canal) nearly half that of the shell : canal short, very wide and 

 open, turning a little towards the left : outer lip curved and thin : 

 inner lip filmy : jnllar flexuous : operculum triangularly oval, pale 

 yellowish-brown, marked as in F. hirsutus. L. Ov5, B. 0'35. 



A single specimen of this graceful little species occurred at 

 Station D in 008 fathoms. 



'I'^'O. Defrancia fokmosa', Jeffreys. (Plate XLIV. figs. 9, U a, 

 9 b.) 



Shell having the shape of a small Buccinum, usually thin, opaque, 

 and of a dark hue : sculpture variable, but ordniarily consisting of 

 longitudinal and spiral thread-like strise, wliich by their intercrossing 

 produce a more or less regular decussation ; the spiral are more 

 numerous than the longitudinal striae, and the latter are some- 

 times wanting ; the points of intersection are occasionally no- 

 dulous or tubercular ; the longitudinal striae are either almost 

 straight or curved, and in the latter case become strong and rib- 

 like ; the outside of the canal is marked lengthwise with oblique 

 striae, and in some specimens with also the spiral striae in a can- 

 cellated manner ; the fissural groove, lying immediately below the 

 suture, is crossed by crowded and curved minute striae in the line of 

 growth ; the apical or top whorls are exquisitely reticulated, as in 

 other sjjecies of this genus, but now and then they are augulated 

 in the middle of each whorl : colour whitish with a tinge of yellow, 

 and a yellowish-brown apex : spire of moderate length, sometimes 

 turreted, gradually sloping to a point ; apex pinched up and dispro- 

 portionally smaller than the rest of the spire ; its point is usually 

 sharp, but sometimes blunt and button-shaped : whorls 7-8, tumid, in 

 some specimens angulated below the fissural groove ; the last whorl 

 occupies two thirds of the spire when the shell is placed with the 

 mouth upwards : suture deep ; the infrasutural groove is broad, 

 and slopes downwards : mouth pear-shaped, somewhat exceeding 

 half the shell in length : canal short, wide, and nearly straight, 

 ending in a round notch : outer lip flexuous, owing to the incurvity 

 of the fissural groove, acutaugular at its junction with the periphery ; 

 its front edge is finely crenellated by the termination of the spiral 

 strise : fissure remarkably deep and broad : inner Up somewhat 

 thickened, smooth and glazed : pillar rather long and flexuous. 

 L. 0.5, B. 0-25. 



A single specimen from Station 13, 570 fathoms. 



Distribution. Norway; 'Porcupine' Expedition 1869, between 

 the Hebrides and Faroes in 345 fathoms, and 1870 from the English 

 Channel to Gibraltar in from 414 to 1095 fathoms; 'Challenger' 

 Expedition, in the North Atlantic, 1000 fathoms. 



' Beautiful. 



Proc. Zool. Soc— 1883, No. XXVII. 27 



