Bull. U. S F. C. 1893. Pearls and Pearl Shells 

 A 



Plate 31, 



V 



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J 1 



o 



TIFFANY-HIGINBOTHAM COLLECTION. 



(A) Fresh-water pearl, simulating Pan playing on pipes , 



(B) Fresh-water pearl, showing concentric markings. 



(C) Fresh-water pearl, animal head ; white. 



(D) Fresh-water pearl, ram's head ; bronze color. 



( E) Four pearls united, representing head; from Tahiti. 



(F) Ostrea borealis, showing internal structure. 



(G) Fresh-water pearl, Spaniel Head, ruddy copper color. 

 (H) Heart-shaped pearl. 



( I) Ostrea borealis. 



pink. 



(J) Greenish pearl, Haliotis rvfeseens. Lower California. 



( K i Greenish pearl from a large species of Trochus. West coast of 



Mexico. 



(L) Pink Unio pearl. Tennessee. 



(M) Ostrea borealis, resembling human eye. 



(N) Fragment of Unio from Wisconsin ; copper colored. 



(O) Oriental pearl ; peeled. Exterior convex side. 



(P) I nterior concave view. 



