PLATE 14. 
Fig. 1 a — h. Nucleospira vkntricosa. 
1 a, b, c. Individuals of small size. 
1 (I, e. Casts of larger forms. 
If. g, h. Specimens of large size. 
The figures 1 i - o are of Meristki.la. See M. be!la. 
Fig. 2 a - /. Ortiiis stropiiomenoides. 
2 a, b, c. The ventral valves of several specimens which arc more or less exfoliated, so that 
the surface characters arc not fully preserved. 
2 d. e. Casts of the ventral valve, showing the muscular and vascular impressions. 
2 f. Profile of a dorsal valve from which the shell is partially exfoliated. 
2 g, h. Two specimens of the dorsal valve, showing the muscular and vascular impressions. 
2 i . Enlargement of the muscular and vascular impressions, cavities of cardinal and brachial 
processes, etc. of part of a dorsal valve. 
2 k. A farther enlargement of one side of the cast of a dorsal valve. 
2 /. Enlargement of the stria), showing in the depressions some fine concentric striae 
