Tiventy-five Nezu Species of Marine She I is. 6i 



fractibits sex, convexiusailis, longitudinalitei' obscurissime 

 costiilatis, apertura ovatd, labro paulliun incrassato, siniplice. 



Long. 5 mill. 



Lat 175 



Hab. Bombay {Abercrombie). 



A small smooth white species, allied no doubt to 

 R. {Zebina) sublcBvigata of Nevill from the Andaman Islands, 

 but apparently differing in being indistinctly longitudinally 

 costulate, whilst the R. siiblcEvigata is virtually smooth. 



RiSSOA Versoverana, sp. nov. (PI. I, f 15). 



R. testa parvd, delicatiild, ovato-oblongd, seinipellucente, 

 anfractibiis sex, ventricosis, ad sutiiras inipressis, longitudi- 

 naliter suboblique costatis, ad basem atifracti'is tcltimi fere 

 obiiteratis, tranversiin tenuiiiratis, aperturd rotunda, labro 

 temti, siniplice. 



Long. 2 mill. 



Lat. I -20 „ 



Hab. Bombay {Abercrombie^. 



A small, very abundant species in shell sand, that we 

 cannot find has been characterized or described. The 

 longitudinal costae at the base of the last whorl are in 

 most specimens only faint or entirely obliterated. 



Alvania Mahimensis. sp. nov. (PI. I, f. 17). 



A. testa oblongd, solidd, corritgatd, apice obtuso, anfractibiis 

 quinque vel sex, longitudinaliter costiilatis, costis transvcrsivi 

 cancellatis, infra suturas et ad basin nltinii anfractus rubro- 

 coloratis, aperturd ovali, labro planulato, incrassato. 



Long. 275 mill. 



Lat. 1-50 „ 



Hab. Bombay {Abercrombie). 



A pretty species of Alvania, being lightly longitudinally 

 ribbed, with transverse cancellations. Below the sutures 

 there is a red transverse band, which also shews near the 



