On new Species of Shells from Uruguay. 319 



149. C. labiata, D 'Orbigny. Ilyalcea infiexa, Per. & Lcs. 



150. Clio pyramidata, Browne. 



151. C. lanceolata, De Bl. 



152. C. cuspidata, Lam. 



The species first named in italics appear to be new to 

 science ; those to which an asterisk is prefixed I consider 

 peculiarly northern ; and that to which a dagger is prefixed I 

 consider peculiarly southern or Mediterranean. All the other 

 species had been dredged by me in the ' Porcupine ' cruise of 

 1870 off the western coasts of Spain and Portugal. The 

 result shows that out of the 152 species in the above list, 

 11 are new, 3 northern, 1 southern, and 137 'Porcupine.' 

 When M. de Folin has completed his examination of the 

 sifted material, other species will in all probability have to 

 be added to the list. 



XXXIX. — Descriptions of five new Species of Shells from 

 Uruguay. By Edgar A. Smith. 



The shells about to be described were collected by Dr. Cop- 

 pinger, of H.M.S. ' Alert,' at present stationed in the Straits 

 of Magellan for the purpose of surveying and exploration. 

 The specimens from that region will shortly be treated upon 

 elsewhere ; and as those now characterized have a distinct 

 geographical distribution, it is deemed advisable to publish 

 their descriptions separately. 



Nassa (Caisia) simplex. 



Shell rather thin, dirty whitish or pinkish white, with some 

 small indistinct red spots or stains beneath the suture between 

 the ribs. Whorls six and a half. Two apical ones smooth, the 

 rest convex, separated by a deep suture, longitudinally plicated 

 and transversely ridged and sulcated. Plicae not very pro- 

 minent, about seventeen in number on the penultimate whorl ; 

 spiral sulci shallow, cutting through the folds, rather narrower 

 than the interstices, about seven on the upper whorls, two or 

 three of them at the upper part being closer together than the 

 rest. Last whorl sulcated throughout, with the plica? attenu- 

 ated beneath, yet extending to the base. Aperture small, 

 somewhat irregularly circular, dirty brownish within ; outer 

 lip thin at the edge, with an exterior varix, very feebly lirate 

 within. Columella arcuate at the middle, covered with a 

 small callosity bearing an elongate transverse inconspicuous 

 tubercle at the upper part, and some smaller and less distinct 

 ones beneath. Length 12 millims., diam. 7 ; aperture 4j 

 long, 3^ wide. 



