PLATE 95. 
Page 
Fig. 1 - 7. OllTHIS MUSCUDOSA. 409 
1. Dorsal view of a specimen preserving tlie shell. The striae are partially obliterated by the 
silicification of the shell, and they are not sufficiently curved towards the hinge-line in 
the figure. 
2. Profile view of the same specimen. 
3 & 4. Dorsal and ventral views of a smaller specimen. 
5. Interior of the ventral valve. 
6. Interior of the dorsal valve. 
7. Cardinal view of the dorsal valve, showing the outline and the elevation of the processes. 
Fig. 8. Stropiiodonta magnifica. 414 
8. A cast of the ventral valve, showing the muscular impression in part, with the shell pre¬ 
served upon the lower part of the specimen. 
Fig. 9. Stropiiodonta magniventra. 411 
9. This figure is an impression tahen from a mould in sandstone, left by the solution and re¬ 
moval of the shell. The broad reniform muscular impressions are strongly defined by an 
elevated rim; and between these and the median crest there are, on each side, other 
equally marked impressions, which, with the flattened median crest, appear to have been 
the points of attachment for the adductor muscles. Below and outside of these are vascu¬ 
lar impressions approaching those of Puoductus, which are strongly marked, but not 
limited as the others. 
Fig. 10. Stropiiodonta yascudaria. 412 
10. A cast of the dorsal valve from an impression in sandstone. The divisions of the cardinal 
process arc not of the full length, owing to the cavities not becoming filled with the ma¬ 
terial forming the cast. 
