Species of the Genus Unio. 191 



elongated form were taken by me in the River Goomty. I got 

 a handsome variety of the first, with a green and olive epidermis, 

 in the River Dojora, near Bareilly ; and from the Gungut River, 

 near Monghyr, in Bahar, a shell which may possibly be a gib- 

 bous variety of the second. 



The anterior and posterior cicatrices are distinct, the latter 

 particularly so ; the apical cicatrices are indistinct on the inner 

 side of the cardinal tooth ; cavity of the beaks very deep and 

 angular. In affinity the species appears to be connected on one 

 side with the variety trigona of U favidens, and, on the other, 

 with U. Rajahensis, Lea. 



The green Dojora variety is remarkable for the great develop- 

 ment of the teeth. The lateral ones are disposed to be treble in 

 the right as well as in the left valve ; and several parallel plicae 

 intervene between them and the exaggerated cardinal teeth in a 

 perfect specimen with the following dimensions : — 



Lat. 50, long. 37, diam. 23 mill. 



8. Unio plagio soma, B., n. sp. 



U. testa transverse trigono-ovata, inaaquilaterali, crassiuscula, tumidi- 

 uscula, antice rotundata, postice subconvexe declivi, demum obtusa, 

 margine ventrali convexiusculo ; disco obsolete plicato, epidermide 

 luteo-olivacea vel olivaceo-fusca ; umbonibus convexis, prominenti- 

 bus, decorticatis, angulatim flexuoso-sulcatis, apicibus prominenti- 

 bus subremotis ; ligamento brevi ; carina umbonali obtusa ; lunula 

 elliptica ; dentibus cardinalibus crassiusculis, radiatim eroso- 

 sulcatis, lateralibus subelevatis, modice elongatis, obliquis, valvse 

 sinistrse duplicibus, dextrse simplicibus : margarita colore salmonis 

 tincta. 

 Long. 26, lat. 39, diam. 18 mill. 



,, ZZ, ,, oZ, ,, 10 ,, 

 Habitat in flumine Cane, prope Banda, Bundelkhund. 



The anterior cicatrices, as well as the posterior, are subcon- 

 fluent, the apical ones situated on the under side of the cardinal 

 teeth. The nacre is very iridescent posteriorly. A dark raised 

 line borders the inner side of the umbonal slope, which exhibits 

 a few rugae at the upper part. 



9. Unio lavirostris, B., n. sp. 



U. testa transverse oblonga, subovata, valde insequilaterali, crassi- 

 uscula, medio subtumida, antice superne breviter angulata, deinde 

 rotundata, postice superne sensim convexe descendente, demum 

 rotundata, margine ventrali convexiusculo ; disco lseviusculo, con- 

 centrice leviter striato ; epidermide olivaceo-viridi, fusco fasciata ; 

 umbonibus convexis, decorticatis, obsolete radiato-sulcatis, apicibus 

 prominentibus, approximatis ; lunula impressa, elliptica ; ligamento 

 elongato ; dentibus cardinalibus brevibus, crassiusculis, eroso- 



