136 
Plate XIX 
Perm weelaupensis MeLearn n, sp. 
Figure 1 . Ligament of right valve of holotype. Viet. Mem. Mus., Cat. No. 7704. (Page 93.) 
Figure 2. Right valve. Same specimen. (Page 93.) 
Ctenostreon gikshanensis MeLearn n. sp. 
Figure 3. Left valve of half-size specimen, showing proportions of posterior ear. Eight ribs. 
Paratype. Viet. Mem. Mus., Cat. No. 7700a. (Page 91.) 
Figure 4. Right valve of holotype. Seven ribs. Viet. Mem. Mus., Cat. No. 7700. (Page 91.) 
Ostrea weegeti MeLearn n. sp. 
Figure 5. Right valve of holotype. Viet. Mem. Mus., Cat. No. 7702. (Page 92.) 
