156 PYRAMIDELLID^. 



lowermost being' partly concealed by the suture ; the succeed- 

 ing whorl exhibits 2 stria3 only ; the top whorl is smooth : 

 colour white : spire tapering to a rounded point ; nucleus glo- 

 bular, and twisted inwards in various directions : ivliorls 4-5, 

 very convex and almost tumid, gradually enlarging ; the last 

 occupies more than half the shell : suture very deep, and nearly 

 straight : mouth proportionally small, oval, expanded below ; 

 its length scarcely equals one-third of the whole spire ; outer 

 lip rounded, recurved on the lowermost spiral stria : inner lip 

 nearly indistinct on the upper part, gently curved and slightly 

 reflected below, and terminating at the base in an obtuse-an- 

 gled point: umbilicus extremely small and narrow, but distinct: 

 footh minute, somewhat retired, and obscure. L. 0-06. B. 0*03. 



Habitat : The deep-water zone in east Shetland from 

 60° to 61° N. lat. ; also in the Minch, off Loch Ewe, 

 Ross-shire, in 60 f. (J. G. J.). 



This minute shell, not much larger than 0. minima, 

 was discovered by Mr. Barlee. I have never found living 

 specimens, although some had evidently not long been 

 vacated by the animal. Sars has recorded this remark- 

 able sj)ecies as fossil in post-glacial shell-banks near 

 Skien in the Christiania district, at a height of 100 feet, 

 and as living at Oxfjord, Bergen, and Cliristianiafiord ; 

 Lilljeborg also dredged it at Bergen, and obligingly gave 

 me a specimen for comparison. 



Clark described it as Chemnitzia Barleei — a well-de- 

 served compliment to the discoverer, but an unnecessary 

 synonym. Turhonilla eximia of A. Adams, one of his 

 recent discoveries in Japanese waters, is not the present 

 species. 



26. O. fenestra'ta^, Forbes. 



0. fenestrata, (Forbes) Jeffr. in Ann. & Mag. N. H. 2nd ser. ii. p. 345. 

 Chemnitzia fenestrata, F. & H. iii. p. 249, pi. xciii. f. 6, 7. 



Body nearly clear white, with a frosted aspect ; the neck is 

 marked on each side, as far as the tentacles, with a pale lead- 



* Covered with latticework, like a window. 



