292 MR. E. A. SMITH ON THE [Apr. 1, 



Triforis atlantica. (Plate XXI. fig. 26.) 

 I'esta hand perehngata, alha, livido-fvsco infer»e zonata ; anfrac- 

 tus 13, anguste iurriti, sitprcmi minute eancellaii, ctrteri i^lani, 

 grannlorinn seriehus (htohus vel tribns cincti, ultimus serkhus 

 qvinque, injiinn mums tuhcrcvhda. ornains ; Cauda hrevis^ 

 carina valida insfructa, fuscescens ; apertura ohlicpui, ovata, 

 siipeiTie canaliculaia ; peristoma svperne leviter incisiim,inferne 

 colnmellce callo crasso juncfum. 

 Longit. (3 rnilJim., diam. 2. 



The outlines of this species are a little convex. Only the penul- 

 timate and antepenultin-.ate whorls have three distinct rows of 

 granules, and of those the central one is the smallest. The granules 

 of the lowermost series, or rather the interstices between them, are 

 brown and the uppermost series is white. 



Triforis recta. (Plate XXIV. fig. 3.) 



Testa fJongata, gracilis^ fnsecscens, ad apicem phrirmfiue. pallida ; 

 anfractus 13, primi duo hicarinaii, cceteri liris trihus, granosis, 

 sidxeqtfcdihus, cincti, idtimus liris duabus simplicihxis infra 

 medium instructus ; linea siduralis canalindata ; apertura 

 imrva, ovalis ; lahr urn super ne lev iter sinuatum ; columella callo 

 incrassato induta ; cancdis brevissimus, Tiaucl clausus. 

 Longit. 5 millim., diam. IJ. 



This species is more slender than any of the others from 

 St. Helena, and remarkable on account of the sculpture of the apical 

 whorls, which is not fine as in T. melanura and T. perversa, but 

 consists of two strong spiral keels on each whorl. The above- 

 mentioned species also have only two series of granules on the whorls 

 towards the apex, whereas in the present species there are three. 



Triforis bathyraphe. (Plate XXIY. fig. 4.) 



Testa hand perelongata, albida vel pallide fusca ; anfractus 11, 

 convcxiusculi, sutura profunda sejuneti, liris spiralihus tribus 

 subaciiudihus, lirisque longitudinalibus circiter 26 granose can- 

 cellati; anfr.idtimus liris sexcinctus ; apertura rotunde ovata ; 

 labrum tenue, superne ad suturam anguste sinuatum, inferne 

 columella' junctum ; caudabrevis, leviter recurvcC 

 . Longit. of millim., diam. 2. 



This species is peculiar on account of the deep suture and the 

 distinct cancellation of the surface. The whorls, too, are convex, so 

 that the central row of granules are most prominent. It is a much 

 stouter sheD than T. recta and has a different aperture. 



Cerithiopsis rugulosa (C. B. Adams). 



Cerilhivm rugidosum, C. B. Adams, Contributions to Conch, 

 p. 121 ; Sowerhy, Thes. Couch, pi. 1^4. fig. 2:37 (237 * ?). 



Hab. Jamaica {Adams) ; St. Vincent's {Brit. Mus.) ; .\lgiers 

 {Sower by) ? 



