158 PLEUROTOMID®, 
Foot short, broad, rounded behind ; eyes near the tips of the 
tentacles. Dentition (1-1-1), Pl. 33, fig. 58. 
Supposed to be a fluviatile species, allied to Melanopsis, which 
it superficially resembles, the marine habitat and family relations 
of Clionella were first pointed out by Stimpson (Am. Jour. Sci., 
2d ser., xxxvlii, 48; Am. Jour. Conch.,i,62). He unnecessarily 
made a new family, Clionellid, for it, and for the slightly 
different type of dentition proposed Tomoglossata. 
Genus PUSIONELLA, Gray, 1847. 
Shell fusiform, solid, smooth, shining; whorls numerous; spire 
sharp; lip without sinus; canal short, exteriorly carinated at 
the base ; columella twisted anteriorly. Operculum with lateral 
nucleus. 
Hyes at the external bases of the tentacles. W. Coast of 
Africa. 
The smooth shining whorls and form of the spire resemble 
Terebra, but the body-whorl is proportionally larger and wider 
than in that genus, and more contracted below, and the spire is 
much shorter. Differs from Terebra also in the position of the 
eyes, which are terminal in the latter. It may readily be dis- 
tinguished from Clavatula by its smooth surface and the absence 
of a sinus of the lip. 
Genus SURCULA, H. and A. Adams, 1853. 
Shell turriculated, fusiform; spire long; lip-sinus in the 
infrasutural depression above the peripheral carina ; canal long, 
slightly bent. Operculum with medio-lateral nucleus. 
Animal with eyes at the base of the tentacles. Dentition 
(1-0-1), Pl. 33, fig. 59. 
Distr.— Warm Eastern Seas. 
The tertiary groups Clinura, Brocchi (Europe), and Surculites, 
Conrad (United States), may be here included. 
Ill. Mangiliine. 
Genus MANGILIA, Risso, 1826. 
Dedicated to the Italian naturalist, Mangili. Not Mangelia, 
as usually written. 
Shell fusiform, imperforate; aperture oval-elongated, usually 
