V0 1889 n '] PROCEEDINGS OF THE NATIONAL MUSEUM. 331 



Tins species agrees more nearly with the [ndo-Pacific species by 

 having three mtervarical ribs, while the Atlantic species hitherto 

 known have only one. It is, however, more nearly related to P. tristich m 

 Dall than to any hitherto described, as far as I have been able to ascer- 

 tain. The body of the shell is not unlike that of P. cordismei Watson, 

 figured in the Challenger report, but the present species has none of 

 the semitubular spines which give the Australian shell the look of a 

 Typhis. A variety almost wants the intervarical ribs and has the fin- 

 like point of the varices present on all of them. It is probable that 

 there is a good deal of variation in these small details. 



Geuns EUPLEURA H. & A. Adams. 

 Eupleura Stimpsoni Dall. 

 Plato xi, Fig. :?. 

 Eupleura Stimpsoni Dall, Bull. Mus. Comp. Zool., xvm, p. 204, June, 1889. 



Shell small, thin, whitish, not polished, with four varices to the whorl 

 and five whorls ; nucleus smooth, white; spiral sculpture of extremely 

 fine- faint stria? and of (on the last whorl) five low keels, most prominent 

 on the back of the varices. The posterior keel is produced at the 

 shoulder as a spine, which .on the front side of the varix looks as it it 

 were holding up the webbing of the varix as a tent-pole holds a tent; 

 the other keels are represented on the front of the varix only by shal- 

 low grooves. The transverse sculpture is composed of well-marked in- 

 cremental lines ; above the spine on the last whorl the web of the varix 

 extends to the fifth preceding varix ; below the spine it follows the 

 outline of the aperture nearly, and terminates midway down the canal ; 

 the margin is even except at the spine aud the ends of the grooves; 

 aperture rounded, continuously marginate except at the open narrow 

 canal; there are four teeth inside the outer lip in front of the spine, and 

 three near the front of the inner lip; the canal is slightly recurved, 

 the end of the antecedent caual projecting from it at the left; suture 

 well marked. Maximum- longitude of shell, 12; of last whorl, : of 

 aperture, 3; of canal, 4; maximum latitude of aperture, 2.2; of the 

 varix at the spine, 2.8 ; of the shell, 7 mm . 



Hab.— Near Barbados, in about 100 fathoms; dredged alive, but the 

 soft parts were lost before the specimens were received. 



Subfamily PURPURIN^. 



Geuus PURPURA Bruguifere. 



Purpura deltoidea Gmelin. 



Purpura haemastoma L. var. trinidadensis Guppy. 



The above were collected at the Abroihos Islands, on the southeast 

 coast of Brazil. 



