142 Dr. J. C. Melvill on Marine Mollusca 



suturas stramineo, infra peripheriam fusco-zonato, versus basin 

 spiraliter noduloso ; apertura oblonga, labro paullum incrassato, 

 columella 5-plicata, fere recta. 

 Long. 23, lat. 8 # 75 mm. 



Hab. Persian Gulf, Hen jam Island, 10 fathoms. 



Allied to this little species are those of the group of which 

 M. multicostata, Svv., may be taken as an exponent. It is 

 much narrower in form than this species, the beautiful 

 shining riblets and decussating cancellations so regularly 

 disposed, with the white stramineous and fuscous zoned spiral 

 bands, serving to characterize it. M. scuiptilis, Reeve, is of 

 somewhat similar build, but here the interstices alone are 

 latticed, the ribs remaining clear. In ite'ina there is com- 

 plete cancellation, and the same obtains in M. dccdala, Rve. 



Lamellaria (Chelynotus) herghi, Desh. 

 (PL IV. fig. 8.) 



Lamellaria herqM y G. P. Desliayes, Moll, de Reunion, 1863, p. 77, 

 pi. ix. figs. 18-20. 



I figure what appears to be a non-adult form of herghi, 

 Desh., a most fragile, delicate, vitreous shell, with bluish 

 tinge, perfectly translucent, apex mamillate, very minute, 

 measuring alt. 9, diam. 8 mm. So many endemic species or 

 forms, closely allied to and yet specifically distinct from 

 others ranging further south, have been recently discovered in 

 what might be termed the " cul de sac" of the Persian Gulf, 

 that it is quite possible that, when mature, this may present 

 characteristics for differentiation ; but, at all events, it 

 being the first time a member of this group has been reported 

 from these seas, a record of its occurrence is interesting. A 

 very few examples were collected, all live shells, similar in size 

 and all other respects. No exact locality is given otherwise 

 than " Persian Gulf." 



Melanella lampra*, sp. n. (PI. IV. fig. 9.) 



M. testa parva, attenuata, delicata, pellucida, pallide olivacea, ltevi ; 

 anfractibus 11, ad suturas impressis, ventricosulis, perkevibus, 

 diaphanis, ultimo tres anfractus approximates exasquante, versus 

 basin leniter declivi ; apertura oblonga, labro baud efl'uso, recto, 

 margine columellari obliquo, simplice. 



Long. 6, lat. 1*50 mm. 



Hub. Persian Gulf, probably off Sliaikh-Shuaib Island. 

 * \an7rpp?, shining. 



