144 
PlateIXXIII 
Oxytoma submcconnelli McLearn n. sp. 
Figure 1. Left valve of holotype. Viet. Mem. Mus., Cat. No. 7703. (Page 92.) 
Sonninia hansoni McLearn n. sp. 
Figure 2. Side view of holotype. Details of first lateral lobe of first marked suture line im- 
perfect. Viet. Mem. Mus., Cat. No. 7707. (Page 95.) 
Figure 3. End view same specimen. (Page 95.) 
