156 PYRAMIDELLID.E. 



lowermost being partly concealed by the suture ; the succeed- 

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

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

 bular, and twisted inwards in various directions : whorls 45, 

 very convex and almost tumid, gradually enlarging ; the last 

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

 straight : mouth proportionally small, oval, expanded below ; 

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

 Up 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 : 

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



4u+ ^ rt; , 

 HABITAT : The deep-water zone in east Shetland from 



60 to 61 N. lat. j 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 species 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 Chris tianiafiord ; 

 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. Turbonilla eximia of A. Adams, one of his 

 recent discoveries in Japanese waters, is not the present 



Species. Pyrj-4 \*+ f*n*fc**<v 



Wi-^r 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. 



