Bay of Bengal and the Arahian Sea. 241 



anfractiis 11-12, costis leviter obliquis circiter 12, paulo infra 

 suturam sulco baud profundo bisectis, iustructi, undique tenuiter 

 spiraliter striati ; apertura parva, longit. totius 5 baud sequans ; 

 labrum tenue, prominens, arcuatum, supra profunde sinuatum ; 

 columella callo conspicuo soluto, ad suturam promineute et labro 

 juncto induta ; canalis anterior brevis, recurvus. 

 Longit. 19 millim., diam. 6 ; apertura 6 longa, 2 lata. 



Ilab. Station 233, off Andaman Islands, 185 fath. 



This species is remarkable on account of the fine transverse 

 strise which cover the entire surface, also for the prominent 

 columellar callus and the deep rounded sinus of the labrum. 

 The upper ends of the costie are cut off by a shallow groove 

 or depression. Found attached to Xenophora pallidula. 



10. Trophon tenuirostralus. 



Testa fusiformis, albida ; spira acuminata, turrita ; anfractus circiter 

 octo, infra medium angulati, supra declives, paulo concavi, longi- 

 tudinaliter tenuiter plicati (plicis in anfr. ult. 12-13 inferne 

 attenuatis), b'neis iucrementi tenuibus striati, ultimus liris tribus 

 subobsoletis transversia cinctus, infra angulum convexus, antice 

 tenuiter rostratus ; apertura superne ovata, antice canaliculata ; 

 columella rectiuscula, callo tenui induta. 



Longit. 28 millim., diam, 10| ; apertura cum canali 15 longa, 

 4^ lata. 



Hab. Station 233, off Andaman Islands, in 185 fath. 



The plicae become slightly acutely nodose at the angulation, 

 and the three feeble transverse ridges upon the body-whorl 

 give it a faintly clathrate appearance. One example only. 



1 1 . Trophon indicus. 



Testa late fusiformis, alba, epidermide tenui subolivaceu induta ; 

 spira turrita, conica ; anfractus 8 ?, supra declives, subconcavi, in 

 medio angulati, plicis obliquis tenuibus (in anfr. penult, circiter 

 18) iustructi, spiraliter tenuiter striati, ultimus amplus, plicis 

 antice tenuioribus ; apertura alba, longit. totius | adaequans ; 

 labrum tenue, supra angulum late baud profunde sinuatum, infra 

 arcuatim prominens ; columella callo albo induta, leviter in- 

 curvata. 



Longit. 35 millim., diam. 1 8 ; apertura 18 longa, 8 lata. 



Hah. Station 233, off Andaman Islands, in 185 fath. 

 In addition to the plicae, the surface exhibits fine lines of 

 growth. A single specimen only. 



