Prothyris (Paraprothyris) knodi Clarke 



Fig. 1,2 Conjoined valves, showing the anterior byssal 



notch and posterior cardinal ridge 

 3, 4, 5, 6 Other valves showing in more detail the cardinal 



characters 

 7 Enlargement of posterior part of specimen figiM-e 4 



Locality: Ponta Grossa, Brazil 



Cardiomorpha ? colossea Clarke 



Fig. 8 Sculpture cast of a right valve of medium size 



Locality: Ponta Grossa, Brazil 



172 



