PLATE XLI. 



Fio-. ... 1. ExoGYRA cosTATA, /Say, p. 461 ; inner-view of the same specimen as figured on 



pi. xl, figs. 1 and 2. 



Figs. 2 — 3. ExoGYEA Tamulica, Siol., p. 462 ; Arrialoor, Arrialoor group. 



Figs. 4 — 6. Pecten [Camptonectes] curvatus, Geinitz, p. 423 ; 4 and 5, views of the right 



and left valves enlarged twice, the radiating strise being in the former thinner 

 than in the latter ; 6, front-view outlines of the two valves ; both specimens 

 are from Garudamungalum, Tncldnopoly groitp. 



Figs. 7 — 8. Ajiusium ? membeanaceum, Nills., p. 436 ; right and left valves; the shell-surface 



is not perfectly preserved in either of them ; Arrialoor, Arrialoor group. 



Fig. ... 9. Amusium illustee, StoL, p. 436; side- and front-views; the latter in outline; 



Arrialoor, Arrialoor group. 



