•CALCIFEROUS SANDSTONE. 
11 
Genus OPHILET A ( Vanuxem ). 
'.[■Greek, ocpig, a snake, and £i\r;rog, coiled; the fossil having the appearance of a snake in coil ] 
Planorbicular, discoitlal ; volutions numerous, slender. 
The above characters are drawn from the descriptions of Mr. Vanuxem ( Report , p. 36). 
I append the woodcut, showing the forms given by him in his report.* 
11. 1. OPHILETA LEVATA. 
Pl. III. Figs. 4 and 5. 
Ophileta levata. Vanuxem, Geological Report, p. 3G, fig. 1. 
Discoidal ; volutions numerous, slender ; spire not elevated above the edge of the outer 
volution; concave beneath ; volutions angular below ; aperture not expanded ; surface 
apparently smooth. 
This fossil bears a close resemblance to Euomphalus, to which genus I incline to refer 
it, since it presents no essentially distinct characters. I have, however, in deference to the 
opinion of my friend, allowed it to remain under the proposed name of Ophileta. 
Position and locality. This fossil is not uncommon in the fucoidal layers in the Mohawk 
valley ; it therefore appertains to the higher portions of the rock. The specimens in which 
it occurs are often finely granular, and sometimes oolitic, containing numerous finely 
comminuted fragments of other fossils. 
12. 2. OPHILETA COMPLANATA. 
Pl. III. Fig. 6. 
Ophileta complanata. Vanuxem, Geological Report, p. 36, fig. 2. 
Discoidal, planorbicular ; volutions numerous, very gradually increasing in size from 
the apex. 
The specimen figured by Mr. Vanuxem (woodcut, fig. 2) preserves a more distinct out¬ 
line than any one I have seen. The specimen, fig. 6, pl. 3, is from the State Collection, 
and labelled as above by Mr. Vanuxem. I have obtained similar obscure forms from this 
rock, but it is impossible to define any essential characters. Whatever may have been its 
original nature, it is quite unsatisfactory at present, and can scarcely be regarded as of 
much importance as a characteristic fossil. 
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