PLATE XIX. 



Fig. 1. — Baena liebraica Cojte. Between oue-fourth antl one-third natural size, from above; posterior 



part restored. Page 146. 

 Fig. 2. — Tlio same from below, not restored. 



Fig. 3. — Bacna undata Leidy. Part of carapace, one-third natural size. Page 147. 

 Fig. 4. — Anterior extremity of plastron of the same specimen. 

 Fig. 5. — Posterior extremity of the same plastron. 



