142 
Plate XXII 
Plagiostoma hazeltonense McLearn n. sp. 
Figure 1 . Radiating striae near posterior end of right valve of a paratype. Viet. Mem. Mus., 
Cat. No. 7705d. (Page 94.) 
Figure 2. Small specimen showing posterior ear of a paratype. Viet. Mem. Mus., Cat. No. 7705c. 
(Page 94.) 
Figure 3. Dorsal view of a half-size specimen showing inflected area and anterior ear. Paratype 
Viet. Mem. Mus., Cat. No. 7705a. (Page 94.) 
Figure 4. Ornament at posterior end of the right valve of a paratype. Viet. Mem. Mus., Cat. No. 
7705b. (Page 94.) 
Figure 5. Ornament a little posterior to middle of left valve of a paratype. Broad, flat bands 
separated by narrow grooves. Viet. Mem. Mus., Cat. No. 7705a. (Page 94.) 
Guhsania ramata McLearn n. sp. 
Figure 6. End view of holotype. Viet. Mem. Mus., Cat. No. 7711. (Page 99.) 
Figure 7. Side view of same specimen. (Page 99.) 
