Bay of Bengal and the Arabian Sea. 243 



sutura profunda sejuncti, plicis arcuatis numerosis (in anfr. 

 ])enult. ciroiter ] 8, in superioribus minus numerosis) instructi, 

 liris spiralibus (in anfr. penult, circiter 7, lineis liliformibusinter- 

 calatis) supra plicas continuis ornati, ultimus pone labrum varice 

 valido munitus ; apertura alba, longit. totius | adaequans, antics 

 oblique canaliculata ; labrum ad marginem tenue, iutus tenuiter 

 liratum, antice tuberculo conspicuo munitum ; columella superne 

 arcuata, callo albo, circumscripto, supra labro juncto, induta. 

 Longit. 31 millim., diam. 17 ; apertura 16 longa, 8 lata. 



Hah. Station 237, lat. 13° 17' N., long. 93° V E., off 

 Andaman Islands, 90 fath. 



15. Pisania angusta. 



Testa angusta, rufo-fuscescens, circa medium anfr, ultimi albo cincta, 

 lineis transversis paucis albo et rufo punctatis ornata ; anfractus 

 8 ?, superiores longitudinaliter costati et spiraliter tenuiter lirati, 

 convexiusculi, tres ultimi baud costati, leviter convex!, striis 

 transversis lineis(|ue iucrementi arcuatis sculpti ; apertura an- 

 gusta, ovalis ; labrum extra incrassatum, intus album, liratum, 

 ad marginem denticulatum ; columella arcuata, callo valido albo 

 indiita, superne tuberculo gracili munita ; canalis anterior brevis, 

 obliquus, recurvus. 



Longit. 21 millim., diam. 8| : apertura 9 longa, 4 lata. 



Hah. Off south coast of Ceylon, 34 fath. 



In form rather like P. crenilahrum, A. Adams. 



16. Nassa aracanensis. 



Testa minima, oblique costata, costis superne acute nodosis, alba, 

 infra suturam inter tubercula et circa basin anfr. ultimi purpureo- 

 fusco tincta, et circa medium fusco-picta ; spira turrita, baud 

 acuta ; anfr. 7, superiores tres Iseves, nitidi, caeteri inter costas 

 obliquas arcuatas transversim striati ; apertura alba ; labrum 

 extra costa valida alba incrassatum, intus liris circiter 7 munitum ; 

 columella callo tuberculato induta. 



Longit. 7 millim., diam. 4 ; apertura 2| longa, 1| lata. 



Hah. Reef Island, Kyuk Phyon, off Aracan coast. 



The costse are thirteen upon the body-whorl, which also 

 has a few of the strise around the lower part stronger than 

 those above. The columellar callus exhibits about six or 

 seven small tubercles, of which the uppermost is the largest. 



17. Nassa diluta. 



Testa ovata, superne acuminata, albida, epidermide tenuissima 

 olivacea induta ; anfractus 7, primus laevis, cseteri costis 11-12 



