from the Persian Gulf) d-c. 157 



examples were dredged, and if is possible it may attain 

 slightly larger dimensions, as wo are not certain of these 

 being- adult. 



Cypricardia vertumnalium *, sp. n. (PI. V. fig. 34.) 



C. testa sordido alba, solidula, polymorphs, oblonga ve'l ovata, 

 nunc alta, ovata, umbonibus prominulis, nunc oblongo-depressa, 

 umbonibus minutis, hie arete concentrice lamellata, illic fere 

 laevigata, superiicie longitudinaliter inter lamellas arete striata, 

 lamellis rudibus, ; due incurvis, intus alba, nitida, sinu 



palliali Lato, profundo, dentibus variatis, plerisque normalibus, 

 interdum cardinali laterali al I deformi, 



Alt. 26, lat. 22, diam. 13 mm. (sp. max.). 



Hah. Karachi. 



A polymorphic species which cannot exactly be matched 

 with any other of the recent forms, with which wo have care- 

 fully compared it, simple though its appearance and characters 

 be. Through the kindness of Mr. li. B. Sowerby we have 

 received a suile of specimens, all from the same locality, or 

 collected by Mr. Townsend, and these each exhibit some 

 varietal phase. 



Carditetta concinna, sp. n. (PI. V. fig. 35.) 



C. testa perminuta, solidiuscula, sequivalvi, fere aequilaterali, sub- 

 triangulata, concinna, umbonibus contiguis, margine dorsali antice 

 excavatula, postice leniter declivi, deinde ventrali rotundata, 

 costis longitudinalibus tredecim, latis in utraque valva, superficie 

 undique arete tenuiter striata. 



Alt. l - 75, lat. 2, diam. 1 mm. 



IJab. Karachi. 



An exceedingly small but neat little shell, the shape some- 

 what triangular, slightly excavate dorsally in front and poste- 

 riorly gradually sloping off to the rounded ventral margin. 

 Slightly convex ; both valves, almost equilateral, are pro- 

 vided with thirteen flattened ribs, the interstices being 

 exceedingly narrow, all everywhere crossed by transverse 

 very fine striae. It occurred most rarely. 



* Vertumnus, the god of mutability, Lad festal days, entitled " Ver- 

 tumnalin," dedicated iu his honour. 



