SOWERBY : ON NEW MAEINE MOLLTJSCA. 1 75 



ridges, causing the most prominent ones to assume the foi-m of trans- 

 versely oblong nodules. 



There is a very small young shell of this species in the British 

 Museum, from the Cuming Collection. 



Triphoka. Smithi, n.sp. 



Testa elongato-acuminata, pallide straminea, anfractus circiter 35, 

 planulati, cingulis spiralibus 2-4 acutiusculis lajvibus instructi, 

 aliter Iteviusculi ; anfractus ultimus obtuse angulatus, ad angulum 

 bicarinatus, infra angulum leviter convexus, triliratus ; rostrum 

 breviusculum, leviter contortum ; apertura subquadi'ata ; labrum 

 tenue. Long. 33, diam. maj. 5 mm. 



Eah.—'i 



Although much smaller than T. princeps, this shell is larger than 

 any other known species of the genus. It is broader in proportion to 

 its length than T. princeps, and both the spiral ridges and the 

 interstices between them are remarkably smooth, showing only 

 irregular gi'owth-lines. The specimen is at present unique. 



Marginella (Cryptospira) robusta, n.sp. 



Testa ovata, solida, fulvo-carneola ; spira occulta ; apertura angusti- 

 uscula, arcuata; margo columellaris albo-callosus, multiplicatus, plicis 



crassiupculis, acutis, super basim testae partim productis ; labrum 

 incrassatum, intus minute dentatum, extus anguste marginatum. 

 Long. 21, diam. maj. 14 A mm. 



