118 BULLETIN OF THE 



them. It looks like the nucleus of Taranis on a larger scale, and is bigger than 

 that of Mr. Watson's specimen as figured. But the difference is not sufficiently 

 important to be of any systematic value. 



Mangilia ? Pourtalesii Dall. 



Plate IX. Fiff. 6. 



Pleurotoma {Mangilia) Pourtalesii Dall, Bull. M. C. Z., IX. p. 60, August, 1881. 



Habitat. Bed of the Gulf Stream, Pourtales, in 447 fms. Off Fernandina, 

 Fla., in 294 fms., sand, temperature 46°. 3, at U. S. Fish Commission Station 

 2668. 



This is related to M. exsculpta^ though easily distinguishable. If either is a 

 Clionella, both seem likely to be. But both seem to me to want the siphonal 

 fasciole of Clionella, and to be more probably Pleurotomoid or Mangilioid. The 

 nucleus is globular, polished, smooth, of two rather large whorls. It resembles 

 the most common form of the nucleus in Drillia, to which it may perhaps h» 

 removed when more is known. 



Mangilia? subsida Dall. 



Plate XII. Fis. 3. 

 Pleurotoma {Drillia) subsida Dall, Bull. M. C. Z., IX. p. 62, August, 1881. 



Habitat. Station 43, in 339 fms. 



This comes nearest to P. toreumata, but is much stouter and more solid, re- 

 calling Drillia Kennicottii. The sculpture too is less varied and elegant. It 

 is possible that its true place is near where I originally referred it rather than 

 here, but I have preferred to put it next its nearest relation, conchologically, in 

 the absence of any knowledge of the animal. 



Mangilia toreumata n. s. 



Plate XII. Fig. 8. 



Shell seven-whorled, the nucleus lost, the fragment of it remaining is smooth 

 and colored like the rest of the shell, a pale straw color ; spiral sculpture 

 (1) of a large undulate thread, or continuous series of undulations, flat behind, 

 sloping forward, sixteen or seventeen on the whorl next to the last; these give the 

 whorl a turrited appearance; (2) of a strong simple thread revolving a short 

 distance in front of the suture and forming the posterior margin of the fasciole; 

 (3) of a dozen or more similar threads on the last whorl, extending from the 

 periphery, where the interspaces are wide, to the canal, where they are narrow ; 

 on the first three whorls of the sjjire none of these threads are visible ; on the 

 whorl next the last there are two between the suture and the shoulder of the 

 whorl; transverse sculpture of rather strong, even, irregularly spaced, concavely 

 arched waves, which cross the fasciole from side to side like a succession of 

 irregularly huddled parentheses; also of a few faint ridges on the base due to 



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