234 Bulletin 31 234 



I 



PLATE 33 



Figure Page 



1-5. Crassatellites trapaquara Harris 96 



Fig. I, 55 mm., type ; Smithville, Tex. 



2, 55 " Smithville ; view from above, showing lunule 



and escutcheon. 



3, type, and a larger Lisbon specimen ( 65 mm. ) 



4, 13.5 mm., young, interior. Smithville. 



5, 13 " young, exterior. " 



6-8. Crassatellites negreetensis, n. sp 97 



Two hundred yds. below mouth of Negreet Bayou, Sabine R., La. 

 Fig. 6, II mm., young. 



7. 13 " 



8, 40 " adult. 



