PLATE XXXIII. 



Fig. ... 1. PsEtiDO-MONOTis [Oxytoma] fallaciosa, 5/<j/., p. 403 J Side- and front-views of 



the flat valve; Rajah' s-ChouUr>/, Arrialoor gron]]. 



Figs. 2 — 3. AucELLA PARVA, 5/0^., p. 404. ; 2,2(7, 2 (5, different views of the same specimen ; 



3, flatter valve showing the anterior ear more distinct than in fig. 2 a ; Odium, 

 Ootatoor group. 



Fig. ... 4. ? Hemiplicatula DETRiTA, <S/o^, p. 452; the shell is much decomposed, and there 



are only the impressions of the strise perceptible on the surface ; Ninnyoor, 

 Arnaloor group. 



Fig. ... 5. Spondylus Arrialooeensis, Siol., p. 447 ; upper- and side-views of a nearly 



prefect, sessile specimen ; the radiating ribs on the ears are not sufficiently 

 clearly shown ; south-wed of Midloor, Arrialoor group. 



Figs. 6, 7, 9, 10. Spondylus calcarattjs. Fori., p. 448; in fig. 7 the shape of the umbonal 

 portion is only approximately restored ; it is probably rarely developed to that 

 extent, particularly when the shells are attached; Serdamungalum, Trichinopoly 

 group. 



Fig. ... 8. Spondylus sub-costulatus, Stol., p. 449; broadly oval variety; Moraviatoor, 



Ootatoor group. 



