MARINE MOLLUSCA OF MADEIRA. 261 



Very rare. The only specimens of which I know were got at 

 Punta de Sao Lourengo. 



Compared with E. intermedia, Cantr., this, besides being smaller, 

 is narrower, has a longer base, a more slowly contracted spire, and 

 a slightly larger apex. E. microstoma, Brus., has a shorter rounder 

 mouth with a more truncate and slightly broader base. The 

 E. glabra, Jeffr. (Lightn. & Pore, P. Z. S. 1884, p. 367, xxviii. 2), 

 is slightly like this species, but is a much larger and stronger 

 shell, with a broader coarser apex aud a larger mouth. 



Earn. Pteamideliidj;. 

 Gren. Odostomia, Mem. 



30. ODOSTOMiAOMPHALOESSA,n.sp. (6yu<pa\oe<rffa,umbilicated.) 

 Shell small, conical, translucent, dullish, with a somewhat 

 swoln umbilicated body-whorl, a shortish spire, and a small 

 abruptly truncated tip, across which the sinistral embryonic shell 

 lies on its side. Sculpture none but very faint lines of growth : 

 there is no keel at the periphery even in young shells. Colour 

 translucent, almost transparent, with a slight ruddy tinge, so 

 that the general appearance is a little horny. Spire short, small, 

 of few whorls ; conical, with a small truncated tip crowned by 

 the sinistral embryonic shell which lies on its side across it. 

 Whorls 4| exclusive of the embryonic tip, fairly curved in contour, 

 and not compressed : the last in particular is large and a little 

 tumid, with freely curved outlines : it makes up | of the shell's 

 height. Suture is strongly marked, being neither shallow nor 

 narrow : its line is very little oblique. Mouth short and round, 

 the length being to the breadth very nearly as 5 to 4, very little 

 pointed above. Outer lip sweeps with a very free curve all 

 round, is not inflected above, and is barely patulous below. 

 Inner lip is very thin and barely convex on the body, which it 

 quits rather early (breaking soon but not immediately into a 

 strong but short tooth), very slightly reflected, not straightened 

 down the pillar, at the point of which it is barely patulous and 

 is not angulated. Umbilicus wide and open, but soon contracted. 

 — H. 0-07. B. 036. 



Eather common, but absent in other collections than my own. 



This species is rather like a small O. acuta, Jeffr., but is less 



conical, has the whorls, especially the last, more tumid and 



rounded, with no keel round the base nor on the periphery even 



