PHILINE. 15 



not raised ; suture shallow round the top whorl, but deepens toward 

 the aperture, and terminates in a rather short and narrow slit; 

 ventral whorl is of a size equal to about half the aperture ; col- 

 umella much curved, mouth large, piriform, expanded and rounded 

 below, contracted above but not pointed ; lip very little sinuous, and 

 somewhat concave on the upper part ; the inner lip forming a very 

 thin callus on the pillar. Shell thin and white ; sculpture consists of 

 numerous lines of growth and microscopical close-set transverse 

 lines. Alt. 9, diam. 6'5 mill. 



Cold area, N. Atlantic, Norweg. N. Atl. Exp. 1876, station 18, 

 400 fms. and station 87, 488 fms. 



Philine Ossian-Sarsi FRIELE, Nyt Magazin for Naturvidenska- 

 berue, 1877, xxiii, 3, p. 9,f. 19 (shell), 19a, b (radula), 19c. (gizzard 

 plate) ; Jahrb. D. M. G. iv, 1877, p. 264. P. ossiani KOBELT, /. c. 

 footnote. 



Seems to be a more attenuated species than finmarchica or fragilis, 

 the species most nearly allied. 



Fig. 22. The teeth (radula) has 16 joints. Gizzard is armed with 

 three uncommonly large and stout plates, fig. 21, measuring no less 

 than 6 mm. The living animal being 15 mm. long the gizzard 

 consequently measures two-fifths of its length and two-thirds of the 

 shell. (Friele). 



P. FRAGILIS Bars. PI. 5, figs. 20, 21, 22. 



Shell very thin and fragile, pellucid, slightly opaline: ovate, 

 rather ventricose, the base widely rounded, vertex truncated by 

 nearly a straight line ; spire distinctly impressed ; whorls 3 ; aper- 

 ture very ample ; outer lip flexuose, somewhat projecting toward 

 the vertex, the terminal lobe rather wide, truncated ; columella pro- 

 foundly concave; umbilical impression distinct, linear. Surface 

 sculptured with numerous growth-stria? decussated by dense, un- 

 dulating spiral lines. Alt. 11 mill. Lateral teeth havinga smooth, 

 not serrate, keel within; no unciui; formula 1*(M. 



Vadso, Norway in deep water. 



P. fragilis SARS, Moll. Keg. Arct. Norv. p. 296, pi. 18, f. lla-c. 



P. CINGULATA Sars. PL 5, figs. 4, 5, 6. 



Shell minute, but less fragile than ordinary, subopaque, quad- 

 rangular-ovate, nearly as wide as long, dilated in the*middle ; vertex 



