PLATE 19. 



fagt 



Fig. I a - y. Strophomena eugosa. 196 



1 a - i. Figures illustrating tlie usual characters presented by shells of this species. 



1 k ( by error marked Is). Profile showing the great extent of the deflected portion of the 



shell. Between this one and lb], there are every possible gradation. 



2 & 2 f. Specimens which are slightly curved, and showing a larger number of corrugations 



than usual, which extend nearly to the base of the shell. 



1 I, m, n. Interiors of dorsal valves, showing some variety of characters. 



\ I \. Enlargement of the strise on the interior. 



1 0, p, q. Casts or moulds left in the stone by the dorsal valves of several individuals. 



1 g t- Enlargement of the muscular imprints, etc. 



1 r, », t. Interior of the ventral valve of several individuals. 



1 u, X, y. Casts of the interior of the ventral valve, 1 u still retaining a portion of the shell. 



