176 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Jime 15, 



tions so common on modern Indian Unios. It is worthy of notice 

 that none of the beaks of our fossil bivalves had been eroded before 

 being imbedded in the deposit, — a circumstance which would indicate 

 a comparatively small quantity of acid in the waters of our ancient 

 lake. Another peculiarity may be here mentioned ; and that is the 

 scarcity of the genus now engaging our attention in the Tertiary rocks 

 of Nagpur. Excepting at Chikni, and at KarwacZ and Kocflbara, which 

 are in its immediate neighbourhood, no Unios have been found at 

 any of the numerous fossiliferous localities within our province, while 

 they abound on the north, west, and south — in the Narbadda territory, 

 in the ceded districts of Berar, and in the Hyderabad dominions. At 

 Ko^bara, where true Unios are met with, there are found nodular 

 concretions, which have been crushed into a shape so very similar to 

 that of Unio as to deceive all but a practised eye. 



II. Shells from the estuarine strata near Bajamandri. 



Fusus pygm^eus, sp. nov. PI. VIII. fig. 29. 

 F. testa minima, ovato-fusiformi, longitudinaliter costata, spiraliter striata ; spira 

 , producta ; anfractibus 6, superne subangulatis ; apertura oblongo-ovata? 



Long. "15 ; lat. - 08 unc. 



Kateru, rare, only one specimen having been found. The figure is 

 magnified. 



PsEUDOLrvA elegans, sp. nov. PL VIII. figs. 30 a, 30 b. 



P. testa ovato-ventricosa vel ovato-globulosa, costata ; spira brevi Tel brevissima ; 

 anfractibus 5-6, ultimo ad basin unisulcato, super et subter sulcum striia 

 ornato ; apertura ovata, angusta vel lata ; columella arcuata, callosa ; labro 

 simplici, superne incrassato. Long. 1-4; lat. - 9 unc. 



Kateru, common. The extremes of form in this handsome shell 

 are so great as to lead to the supposition that they belong to different 

 species ; but this idea vanishes on an examination of the intermediate 

 forms. The congeners of the present species are to be sought under 

 various names, — e. g. the Sulco-buccinumjissuratuni of d'Orbigny, and 

 the Monoceros vetustus of Conrad. 



Natica Stoddardi, sp. nov. PI. VIII. fig. 31. 

 N. testa orata, inflata; spira brevi, apice subacuto ; anfractibus 7, convexis, sutura 



vix impressa separatis, ultimo multo majore; apertura obliqua, semilunari, 



ad basin rotundata; columella arcuata, callosa; labro simplici, crasso; um- 



bilico angusto. Long. 14; lat. 1*1 unc. 



Kateru, common. Of this shell also there are several varieties, 

 but all referable to one species. It possesses a spire longer than 

 usual among Naticas, in this respect slightly surpassing N. Dolium 

 (d'Arch.) of the Indian nummulitic rocks, which in other points of 

 view it greatly resembles. In general contour it is also closely related 

 to N. intermedia (Desh.), though smaller. I gladly dedicate this 

 species to my obliging friend Capt. Stoddard, of the Public Works 

 Department of Madras, in grateful acknowledgment of the valuable 

 collection of estuarine fossils with which he has favoured me. 



Cerithtum multiforme, sp. nov. PI. VIII. figs. 32 a, 32 b, 32 c. 

 C. testa subcylindracea seu elongato-pyramidali, seu etiam pupiformi; anfrac- 

 tibus 11-13, longitudinaliter costulatis ; costellis 4-6, striis spjralibus granulatis ; 



