174 PROCEEDINGS OP THE GEOLOGICAL SOCIETY. [June 15, 



Yar. elongata. PI. Y. figs. 23 b, 23 c. 



P. testa subturrito-elongata, spira producta, apice acutiusculo ; anfractibus 7-8' 

 convexis, sutura distincta separatis, ultimo longitudinis dimidio fere aequali ; 

 apertura ovato-oblonga, superne angulata ; columella incrassata. Long. 2 67 ; 

 lat. T2 unc. 



Yar. inflata. PI. Y. fig. 23 d. 



P. testa ovato-ventricosa, maxime contorta, spira brevissima, apice obtuso ; 

 anfractibus 7-8, turgidis, sutura impressa separatis, ultimo spira fere triplo 

 majore ; apertura ovato-oblonga, superne angulata ; columella incrassata. 

 Long. 2 '8 ; lat. 1*85 unc. 



All these forms may be procured, within the province of Nagpur, 

 wherever the deposit is fossiliferons, especially at Takli, TelankhecZi, 

 Butara, and Phizdura. Excellent specimens have been obtained also 

 from Chichundra by Captain Sankey and others ; but the best have 

 been kindly forwarded to me from the hills on the north of Ellichpur, 

 by Dr. Bradley, of the Bombay Medical Service. Michelin has 

 named the species that occurs at Billy P. gigantea, from its great 

 size ; but his largest specimen falls y^-ths of an inch short of one of 

 ours in length. But these dimensions are insignificant to those of a 

 specimen that I have seen from Sdgar, which measured 3*8 inches in 

 length, and, making allowance for crushing, 2-4 in breadth. Most of 

 our specimens, however, are young, and in this state do not much 

 exceed in size P. nummulitica from the marls of Sabathu, which 

 they also not a little resemble in shape. The occurrence of the last- 

 mentioned species in marine strata is paralleled by the discovery of 

 P. Prinsepii at Pangaeft and Kateru. 



Unio Malcolitsont, Hislop. 

 TJnio tumida, J. Sowerby, Trans. Geol. Soc. 2 ser. vol. v. pi. 47. figs. 11 & 12. 

 JJ. testa laevi, suborbiculari, inflata, subcequilaterali ; valvulis subcrassis ; margine 

 ventrali intus abquando crenato. Diam. "65 ; long. - 7 ; lat. -8 unc. 



This shell was first found by Malcolmson at Mekalgandi Ghat, 

 which is the only locality that has furnished my specimens. Eor 

 Sowerby's specific name tumida, which in its masculine form had 

 already been employed by Betzius to designate an existing species, I 

 have taken the liberty of substituting the name of the lamented 

 discoverer. The length of this and other bivalves here described is 

 measured from the umbo to the base ; the breadth from the anterior 

 to the posterior margin. 



TTxio Deccanensis, J. Sowerby, Trans. Geol. Soc. 2 ser. vol. v. pi. 47. 

 figs. 4-10. PI. YI. figs. 24 a, 24 b, 24 c. 



U. testa lam, subelliptica, obliqua, valde inaBquilateraK ; postice producta, 

 truncata et compressa ; valvulis crassis, obscure radiatis ; margine ventrali 

 intus sajpius crenato ; natibus prominulis, subterminalibus, ad apices elegan- 

 tissime radiato-rugosis ; dente cardinali parvo, laterali praelongo atque subar- 

 cuato. Diam. 1/7 ; long. 2 - 2 ; lat. 34 unc. 

 Sip Ghat, north of Ellichpur and Karuni, common. We have 



thought it requisite to furnish a more complete description ; and a 



new figure is given in PI. YI. figs. 24 a, 24 b, 24 c. 



TJnio Hunteri, sp. nov. PL YI. fig. 25. 

 U. testa lsevi, subquadrangulari, inasquilaterali, postice compressa ; valvulis sub- 



