404 BULLETIN OF THE 



Habitat. Near Barbae! 03, in 100 fms. Station 20, in 220 fms., oflf Bahia 

 Honda, Cuba. OfT Yucatan, in 200 fms., U. S, Fish Commission. 



A species of this genus from Patagonia, in deep water, shows a small but 

 well marked verge in the usual position. One specimen has the eyes black and 

 prominent. In another of the same lot the organs are wholly destitute of 

 pigment. 



Subgenus FISSURISEPTA Seguenza. 

 Fissurisepta triangulata Dall. 



Puncturella (Fissurisepta) rostrata Watson, Chall. Rep. Gastr., p. 48, pi. iv. fig. 10, 1885. 

 Not of Seguenza. 



Having received a few specimens of the form figured and described by Mr. 

 Watson, I have compared them with typical examples both recent and fossil of 

 the original rostrata of Seguenza. There is no doubt that they possess certain 

 features in common, but the form of the Antillean shell is much more triangu- 

 lar, less elevated, longer and more erect, beside the less obvious differences 

 noted by Watson in his description, in regard to minor features of sculpture. 

 I have therefore thought it best to give a new name to the Antillean shell. 

 My specimens come from the coast of Yucatan, dredged in about 200 fms., by 

 the U. S. Fish Commission. 



Subgenus CRANOPSIS A. Adams. 

 Cranopsis asturiana Fischer. 



Rimula asturiana Fischer, Journ. de Conchyl., XXX. p. 51, 1882. Watson, ChalL 

 Report, Gastr., p. 45, pi. iv. fig. 4, 1885. 



Habitat. Yucatan Strait, in 640 fms. Station 100, off Havana, in 250-400 

 fms. (living). Station 208, in 213 fms., hard bottom, off Martinique, bottom 

 temperature 50°.5 F. Gulf of Gascony, in 2018 meters, Travailleur Ex- 

 pedition. Off Cape Florida, in 85 fms., U. S. Fish Commission. 



Rimula capuliformis or messanensis of Seguenza, from the Tertiary of Reggio, 

 Calabria, is a variety with slightly coarser and more irregular radiating ribs. 



The Antillean specimens in general show less reticulation than those from 

 Europe, the tendency being for the radiating ribs to be nodulous and finely 

 shagreened, while the concentric sculpture is obsolete between them. They 

 are also, as a rule, less elevated, and the posterior slope is more concave. But 

 these differences are of degree, and merge into uniformity with a large series. 



The two anterior lobes of the mantle do not unite, although the lobes of the 

 shell do as it approaches maturity. The muzzle is short, round, and plain at 

 the end. The tentacles are short and stout. The eyes are small and black. 

 The epipodial line is marked by seven cirri, of which the pair next to the 

 posterior pair are notably larger than the others. The gills are broad and 



