100 On the Mollusca of the Arabian Sea, &c. 



prominulis, margine dorsali utrinqiio fere acquali, lenitcr in 

 ventralem immcrgente ; ligamento interno, hajus valvae dente 

 cardinal! conspicuo, prolongate, illoe duobus mirioribus approxi- 

 matis, dente laterali jnxta eardinem abbreviato, pagina intus 

 translucida ; impressioue palliali integra. 

 Alt. 9, lat. 14, diam. 4-50 mm. 



Eah. Telegvaph-cable, lat. 27° N., long. 52° E., at 

 40 fathoms, Persian Gulf*. 



A very delicate mollusk, allied to S. rosea, Desh. It is 

 very translucent, shining, of the palest blush reflection, 

 oblong-ovate in form, equivalve and almost equilateral, and 

 quite smooth. The umbones are fairly prominent, close 

 together ; dorsal margin continuous, and almost equal 

 posteriorly and anteriorly, gently merging into the ventral 

 margin. Valves almost closed in repose; the ligament is 

 internal, the cardinal tooth prolonged and consj)icuous, the 

 fellow valve possessing two smaller teeth ; the lateral tooth 

 is short, placed near the hinge ; the inner surface being 

 plain, transj)arent ; pallial impression entire. 



? (Edalina asiatica, sp. n. (PL II. fig. 12.) 



(E. testa delicatula, nitida, alba, a?quivalvi, iiia?quilaterali ; umboni- 

 bus prominulis, coiitiguis; margine dorsali ant ice pauUumexcavato, 

 deinde kniter rotundato ad margincm ventralem, latere postico 

 paullura producto, oblongato ; siipcrlicie nitida, hie illic de])ressi- 

 iiscula,eoncentricerudistriata; ligamento externo: dentibus ilextroD 

 valva; tribus, sinistra? duobiis cardinalibiis, liaud tameii bitidis, 

 latcnilibiis nullis ; pagina interna subpelliicida ; liuea palliuli 

 multnm sinuosa. 



Alt. 12, lat.- 1(5, diam. 8 mm, (sp. maj.). 



Ilah. Muscat, at 10 fathoms ; also smaller examples at 

 Charbar, Mekran coast, at 8-7 fathoms. 



I feel some doubt as to the correct generic designation for 

 this shell. It is in shape externally much like CE laUna 

 suhdiaphaua, Carp., from California, and Mr. Edgar Smith 

 suggested in consequence that it might be possibly located 

 with it. The teeth, very small and difficult to pronounce 

 upon, seem to agree to a great extent with those of the 

 western CEdaliiio, but I do not notice that any of them are 

 bifid. Carpenter separated Cooperella from (Edalina on 

 account of this peculiarity alone. If this species be an 

 Q^didtna, it would tend to show greater affinity with the 

 tScrobicularineai than the Tellinidic, the texture of tlie shell, 

 though thin, being coarse, here and there irregularly de- 

 pressed and roughly concentrically striate. It is equivalve, 



