190G.] MOLLCSKS FROM TJIE PERSIAN GULF. 817 



MoxTACUTA OBLTQUAXS MelviU, .sp. 11. (Pliite LVi. fig. 9.) 



M. testa minima, vitrea, alho-lactea, tenmssima, Icevi, lineis in- 

 crevientalibits sub le'/ite striatula, multum ohliquante, antice 

 cnmpresso-7-otundata, 2^ostim ellipsoidea ; wmbonihtis parvis ; 

 dentibus eardinalibtis duobns contiguis, lateralibus, pruicipue 

 2}osticis, />ai6?Zit«i elevatis, elongatis, cicatricihus muscidaribus 

 bene im.jwessis : ^;(«(/mi« interna alba, semidAapluiMa ; simi 

 pjalliali lata. 



Alt. 2, lat. 3, d/iam.. 1"50 mm. 



llab. P.G. Gulf of Oman. Lat. 24° 58' N., long. 56'^ 54' E. ; 

 156 fathoms. 



M.O. Very rarely oft" Oliarbav at 40 fathoms. 



A very siiiall, smoothish, veiy oblifj^ue species, of which several 

 examples occni-red among shell-sand. 



Fam. Erycixid.e. 



Kellia leucedra* Melvill, sp. n. (Plate LIII. fig. 3.) 

 K. testa globidosa, albo-lactea, tenui, Icevissima, subpellucida, 

 cequivalvi, in(eqtdlaierali, maltum convexa ; umbonibus parvis, 

 nitidis, contiguis, latere antico jJaullidam carlo, postico leniter 

 ad rnarginem ventralern rotundMto, intus ^;>a^M«rt albo-lactea, 

 hand nitente ; dentibus cardinalihus duobas sinistrce valvoi 

 proviinulis, contiguis, dextra cardinaliter unidentata, dente 

 brevi crasso, dente laterali in valva utraque ; ligamento interno. 

 Alt. 15, lat. 15, diam. 10 mm. 



Hab. Persian Gulf, Fao. Ptarely, on the telegraph-cable, at 

 17 fathoms ; mud bottom, with growth of algfe. 



A very globular, smooth, milky-white, delicate and non-pellucid 

 species, the affinities of Avhicli seem more with Kellia than with 

 JJiplodonta. 



Kellia revimextalis t Melvill, sp. n. (Plate LIII. fig. 4.) 



K. testa tenuissirna, parva, subhyalina, albo-lactea, oblonga, 

 supjerficie undique sub lente delicatissime concentrice lirata, 

 inter stitiis longitudinaliter ruguloso-liratis, margine dorsali 

 utrinque leniter deflexo, ventrali recto, lateribus ambobus 

 rotandatis ; umbonibus piarris, acutis, p>rominuUs ; ligamento 

 interno, subm,arginali ; dentibus duobus, tmo laterali ; j^^gina 

 intus alba, margine undique minute crenidato. 

 Alt. 3, lat. 6, diam. 1*5 mm. 



Hab. Persian Gulf : Gulf of Oman. Lat. 24° 58' K".. long. 56= 54' 

 E. ; 156 fathoms, shell-sand. 



A remarkable hyaline species, with finely concentrically-lirated 

 valves and crenulated margin. Only a few specimens occm-red, 

 and with it were fi'agments of another allied species, hardly in a 

 condition to describe. 



* XevKuv, eopa. 



f Sevimentum, a fringe, from the margin. 



