Preliminary Report on Mollusca. 9 



sketch in „Mali Jahrbücher" 1876 Tab. 3 fig. 2 a with the excep- 

 tion that the central plate is broader and squarer. 



Pleurotoma {Bela) ovalfs n. sp. 



Form long oval, with blunt, smooth somewhat depressed apex ; 

 whorls 4, rapidly increasing and convex; suture deep; mouth long 

 oval, and occupying somewhat above half or two-thirds of the 

 length; labial sinus small and obscuie; canal short, broad and 

 rounded below ; columelle almost straight; structure, delicate, longitu- 

 dinal and transverse lines, producing a fine microscopical net-work; 

 the last whorl is girt by a rounded edge disappearnig, in the next» 

 Shell rather thin and colour white, semi-transparent. 



Size: L. 4,6 Br. 2,l mm - 



Operculum ear shaped with a central ridge. Fig. 5 a 



Fig. 5 teeth in different positions» 



Hab: cold area St 40, 1180 f.; 35, 1050 f. & 87, 484 f. 



Pleurotoma {Belä) Willei n» sp. 



Form fusiform, whorls 5|, rather convex; suture shallow but 

 distinct; spire conic; mouth occupies half the length of the shell, 

 and is narrow and accutely angular above, where the lip forms a deep 

 wide sinus; canal short, broad and obliquely truncated at the base; 

 columelle slightly bent; structure, close- set spiral lines and fold- 

 resembling obliquely-set longitudinal ribs which become absorbed to- 

 wards the basis of the shell ; on the body-whorl the ribs grow more 

 numerous than on the upper ones, and increase into coarse lines 

 of growth towards the aperture; apex rather blunt and smooth; the 

 last three turns, rounded angulated; colour white, semitransparent. 



Size: L. 8 B. 4 ram - 



Operculum elongated ear-shape, feebly ridged on the colu- 

 melle-side Fig. 6. 



Hab: cold area St. 18, 400 f. & 40, 1180 f. 



Philine Ossian-Sarsi n. sp> Fig. 19. 



Form oval, the number of whorls 2^ — 8 are visible on the 

 spire which is depressed and in line with the body- whorl; apex 

 small and not raised; suture shallow round the top-whorl, but 

 deepens towards the aperture, and terminates in' a rather short 

 and narrow slit; ventral whorl is of a size equal to about half 

 the aperture; columelle much curved, mouth large, piriform, ex- 

 panded and rounded below , contracted above but not pointed ; 

 lip very little sinuous, and somewhat concave on the upper part 5 

 the inner lip forming a very thin call o on the pillar. Shell thin and 



