214 Annals of the Carnegie Museum. 



Holopea? plauta Raymond. 



(Plate. LIV, figure 9.) 

 Holopea plauta Raymond, 1906, Annals Carnegie Museum, Vol. Ill, 

 P- 577- 



Description. 



Shell small, depressed. Spire scarcely elevated above the level of 

 the body whorl. There are usually two and a half or three volutions, 

 the body whorl expanding very rapidly. Along the outside and at 

 about the middle of the main whorl is a slight ridge, and below this 

 revolving ridge are a series of low broad folds running back into the 

 umbilicus. With this exception the surface is smooth. The aperture 

 is rounded below and rather acute above. The umbilicus is very wide. 



This shell in some ways resembles Holopea scrutator, but may easily 

 be distinguished from it by the almost total absence of a spire and by 

 the wide umbilicus. 



Locality. — A rare shell found in the Chazy on Valcour Island and 

 at Chazy, New York. 



The type is in the Carnegie Museum. 



Holopea sp. 



(Plate LV, figures ii, 12.) 



Another species of Holopea is indicated by two imperfect specimens 

 from Valcour Island. These specimens are somewhat irregular in out- 

 line, and the body whorls show corrugations or wrinkles such as are 

 seen in several species of this genus. In neither of the specimens is 

 the spire preserved, but the shell apparently had two or three volutions, 

 which expanded gradually, the body whorl being free for about half a 

 volution. The surface is marked by very fine, wavy, raised lines 

 which have a forward bend on the upper surface of the whorls, turn 

 backward on the periphery and again make a forward-pointing lobe 

 below. 



The largest specimen is 9 mm. in greatest diameter, and was prob- 

 ably about 7 mm. high when complete. This species differs from 

 Holopea scrutator and Holopea ? plauta in the vagrant body whorl. 



Locality. — The only specimens so far found are from the Chazy 

 Limestone on the west side of Valcour Island. The figured specimens 

 are in the Carnegie Museum. 



