PLATE V. 
Fig. 1. Gervillia Cinderella sp. n. (p. 47). 
Figs. 2, :\. Gervillia ? riograndensis sp. n. (p. 47). 
Side and profile views of the type specimen. 
Fig. 4. Lima < Ctenostreon) riograndensis sp. n. (p. 44), 
120 
