174 On Mullusca from the Bay of Bengal d:c. 



within the opening. Besides the obscure broad zone above 

 refencd to, the suture also is bo-dered beneath with the same 

 colour. 



Natica apertissbna, sp. n. 



Testa subglobosa, latissime umbilicata, tenuis, sordide albida, Isevifi, 

 lineis incrementi striata ; anfractus 5, perconvexi, sutura profunda 

 sejiincti, nltimus circa umbilicum perviura obtuse angulatus ; 

 apertura alba, oblique semicircularis ; columella tenuis, callo 

 tenui reflexo labro juncta. Operculum corneura. 



Longit. 15 mm., diam. 15 ; apertura 10 longa, 6 lata. 



Hab. Station 34.3, Gulf of Oman, G09 fath. 



This species is remarkable for its thinness and the very 

 open pervious umbilicus. Upon the upper whorls the lines 

 of growth beneath the suture are rather strong or subplicate. 



Natica inutilis, sp. n. 



Testa ovato-globosa, mediocriter late umbilicata, alba, loevis, lineis 

 incrementi oblique striata ; anfractus 5, convexi, ultimus antice 

 oblique descendens ; apertura obliqua, semicircularis, alba ; 

 columella rectilinearis, obliqua, supra callo reflexo appresso labro 

 juncta. 



Longit. 19 mm., diam. 17; apertura 12 louga, 6 lata. 



Hab. Station 259, W. of Malabar coast, 295-360 fath., 

 green mud and sand. 



A smaller thinner shell than N. incerta, more ovate in 

 form, and ajiparentiy without any colour. The lines of 

 growth are more conspicuous below the suture than else- 

 wdiere. Under a lens the surface is seen to be very finely 

 spirally striated. 



Only a single specimen obtained. 



Natica albospira, Smith. 



Natica albospira, Smith, Ann. & -Mag. Nat. Hist. ISOo, vol. xvi. p. (1. 

 pi. i. fig. 8. 



Hab. Station 209, W. of Cape Comorin, 464 fath., green 

 mud and sand ; Station 259, W. of Malabar coast, 295-360 

 fath., green mud and sand ; Station 337, oft' Malabar coast, 

 271 fath. 



This species somewhat resembles the widely distributed 

 A^. muroccana, but has a diflerent operculum. 



Natica rvfa, var. 



Natica rufa, var.. Sniitli, Ann. ^^ ^lag. Nat. Ilist. 1804, p. 105. pi. iv. 

 tigs. 14, 14 <7. 



