98 



Prof. E. Forbes on Fossil Invertehrata from Southern India. 



2. Nautilus spharicus, sp. nov. 



N. testa globosa, inflatissim4 (l^vigata?), umbilicata; apertura latissima, lunata, angustata; 

 septis arcuatis ; siphunculo excentrico. 



Median diameter, 4 inches. Breadth at base of aperture, 4/^j inches. 



A very globose shell, as broad 

 as long. It is distinctly umbili- 

 cated. The chambers are narrow, 

 and the septa are slightly curved 

 towards the umbilicus. The siphon 

 is ventrally excentric. The mouth 

 is lunate and narrow. The surface 

 of the shell appears to have been 

 smooth. Nautilus Bouchardianus, 

 described and figured by D'Or- 

 bigny from the French gault, re- 

 sembles the Indian species, but is 

 not so globose, and the si- 

 phon is differently placed. 



Locality, Pondicherry. 



3. Nautilus clementinus, D'Orbigny ? 



N. testa subglobosa, inflata, reticulata, umbilicata; apertura late lunata; septis simplicibus. 

 Median diameter, 2-^-^ inches. Breadth at base of aperture, If'y inch. 



A subglobose inflated shell, distinctly umbilicated, having a wide lunate moutli 

 and very simple chambers. The surface is transversely furrowed by numerous re- 

 gular shallow sulcations, separated by acute ridges, and reticulated by less strongly 

 marked longitudinal striations. The specimens are much injured, and the position 

 of the siphon is not distinctly seen. I cannot distinguish between the Indian fossil 

 and the young of Nautilus clementinus (D'Orb. Pal. Franc; Ter. Cret. i. pi. 13 bis), 

 as described and figured by D'Orbigny from the French gault. 



Locality, Verdachellum. 



4. Nautilus Delphinus, sp. nov. 



N. testa compressa, discoidea (laevigata ?), subumbilicata ; dorso rotundato; apertura lanceo- 

 lata ; septis sinuatls, lateraliter in medio lobo triangulari subacute ad basim superiorem angulato ; 

 siphunculo ? 



Median diameter, 3^^^ inches. Breadth at base of aperture, 2^^^ inches. 



