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the muscles of the pelvis swells the first intercostal plates, forming a very 
strong elevated rib across the costals, branching laterally from the scapulz to 
the arms, at the same time that an elevated ridge is formed over the intercos- 
tals, connecting laterally with the ridge noticed before, extending to the orifice 
in the integument or mouth and rendering it subpentangular, (fig. 4.) 
Should the variety pointed out above in the columnar formation, at a fu- 
ture time enable me to establish two species, I should propose for that from 
Mitchel Dean, the name of Rhodoerinites quinquangularis, 
