244 Mr. W. T. Blanford on a Species 0/ Plectopylis 

 Table — continued. 



Rhynchonella sulcata, var 



Osti-ea frons 



Ostrea vesicularis 



Ostrea Norraaniana 



[lOstrea'} 



Exogyra conica 



Exogyra haliotoidea 



Exogyra Rauliniana 



Anomia (n. sp.) 



Pecten orbicularis (fide Murchison) 



Pecten Beaveri 



Avicula gryphcEoides * , 



Inoceramus Coquandii 



Inoceramus Crispii , 



Inoceramus gryphseoides 



Inoceramus lajviusculus 



Inoceramus sulcatus 



Inoceramus tenuis , 



Spondylus latus , 



Spondylus 



Trigonia Hunstantonensis 



Crioceras occultus , 



Ammonites alternatus 



Ammonites complanatus 



Ammonites rostratus 



Ammonites serratus 



Ammonites auritus 



Belemnites attenuatus 



Belemnites minimus 



Belemnites ultimus 



Nautilus simplex 



Edaphodus (n. sp.) 



Otodus appendiculatus 



Polyptychodon 



Upper 

 Green- 

 sand. 



XXVII. — Note on a Species of Plectopylisj Benson, occurring in 



Southern India. By W. T. Blanford, of the Geological 



Survey of India. 



In looking over a collection of shells made last year in the Nil- 



giri Hills of Southern India, I noticed that all the specimens 



of the little H. retifera, Pfr., were marked with white dots upon 



the translucent base of the last whorl, resembling those which 



correspond to the internal plaits and teeth in H. plectostoma, 



Benson. On cutting into the shell, I found it to possess the 



following characters, which prove evidently that it must be 



classed with that group of Helices for which Mr. Benson (in the 



* Scarcely less abundant than in the Upper Greensand of Cambridge. 



