EXPLANATION OF PLATE I. -(Continued) 



Fig. 6. Orthis caraiisii Salter P. lO 



6a Interior mold of the pedicle valve, x 2. 



6b Same mold x 4. 



6c Exterior impression of another pedicle valve x 2. 



6d Gutta percha mold of same valve x 2. 



6e = 6c X 4. 



6f = 6d X 4. 



Log: — Taihungshan, Nanchang Hsien, N. Hupeh. 

 (G. S. C. Cat. Nos. 3368, 3369a, 3369b). 



Fig. 7. Orthis neichiaensis Chang P. 11 



7a Exterior impression of the brachial valve, Nat. size. 

 7b Gutta percha mold of same valve. 

 7c = 7a X 2. 

 7d = 7b X 2. 



Loc: — Taihungshan, Nanchang Hsien, N. Hupeh. 



(G. S. C. Cat. Nos. 3370a, 3370b). 



Fig. 8. Orthis neichiaensis Chang P. 11 



8a Exterior impression of another brachial valve x 2. 

 8b Gutta percha mold of same valve x 2. 

 8c = 8a x 4. 

 8d = 8b X 4. 



Loc:. — Taihungshan, NanchangHsien, N. Hupeh. 

 (G. S. C. Cat. Nos. 3371a, 3371b). 



Fig. 9. Orthis neichiaensis Chang P- H 



9a Exterior impression of a third brachial valve. Nat. size. 

 9b Gutta percha mold of same valve. 

 9c = 9a X 2. 

 9d = 9b X 2. 



Loc:.— Taihungshan, NanchangHsien, N. Hupeh. 

 (G. S. C. Cat. Nos. 3372a, 3372b). 



(ill) 23 



