GENUS CAMAROP HOBIA. 
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Genus Camaropiioria (King, 1844). 
The Genus Camarophoria is described as having the shells of sub trigo¬ 
nal form, with convex valves longitudinally “ divided by a sinus and 
“ mesial fold. Beak entire, acute, more or less incurved; under the 
“ extremity of which a small fissure is sometimes exposed : no area or 
“ deltidium. Surface generally plaited, with or without marginal expan- 
“ sions : shell structure impunctate ; valves articulating by means of 
“ teeth and sockets. 
“ In the perforated valve , the dental plates are conjoined at their dorsal 
“ margins, forming a trough-shaped process affixed to a low medio-longi- 
“ tudinal plate. In the smaller valve , the space between the sockets is 
“ occupied by a small cardinal muscular protuberance or boss; on either. 
“ side of which two long slender processes curve upwards, to which 
“ were, no doubt, attached the free cirrated spiral fleshy arms. From 
“ beneath the cardinal process, a high vertical mesial septum extends to 
“ a little more than a third of the length of the valve, supporting along 
“ and close to its upper edge a spatula-shaped process, considerably 
u dilated towards its free extremity, and projecting with a slight upward 
“ curve to nearly the centre of the shell.” 
The typical form, C. schlotheimi (Yon Buch sp.), has the same form and 
expression of a strongly plicated Rhynchonella, and differs mainly in 
the trough-shaped process formed by the union of the dental lamellae. 
Authentic examples are known in Europe from the Carboniferous and 
Permian systems, and Mr. Davidson expresses a belief that it will be 
found in the Devonian. Unfortunately I have had no opportunity of 
seeing more than a single American species which could be satisfactorily 
referred to this genus, and that one has a plicated surface and rhyncho- 
nelloid form. It is with much hesitation, therefore, that I refer the fol¬ 
lowing smooth shell of Devonian age to this genus. 
In making a final examination of the obscure lind doubtful mate¬ 
rial of the Corniferous limestone, containing Meristella, Terebratula, 
