468 Systematic Paleontology 



LOXONEMA pp. 

 Plate LXXIX, Fig. 8 

 Description. — Pyramidal, apical angle small; volutions convex, their 

 height about two-thirds of their diameter. Sutures straight, moderately 

 deep. Surface ornamentation unknown. 



Length 25 mm. ; diameter of largest volution 9 mm. 

 The generic relations of this species are unknown. It differs from 

 Loxonema fitcM in its less oblique volutions. It resembles Loxonerna sp. 

 described by Weller ' from the Decker Ferry of New Jersey. 



Occurrence. — Helderberg Formation, Keyser Member. Cash A'alley. 

 Collection. — Maryland Geological Survey. 



[Maynard.] 



Superfamily TAENIOGLOSSA 

 Family LITTORINIDAE 



Genus HOLOPEA Hall 

 HOLOPEA sp. 



Description. — A large specimen, coming from an unknown horizon in 

 the Lower Devonian, was studied, which evidently belongs to this genus, 

 but whose condition of preservation does not permit identification or de- 

 scription. In general aspect it is not unlike H. antiqua, but any attempt at 

 further identification is hazardous till further collections are made. 



Occurrence. — Helderberg Formation. Cumberland. 



Collection. — George M. Boeder. 



[Ohern.] 



HoLOPEA sp. 



Plate LXXIX, Fig. 9 



Description. — The large specimen figured represents a form which 

 is referred with doubt to this genus. A part of the body whorl has been 

 broken off, all surface features have been obliterated and the whole shell 



» Pal. N. J., vol. iii, 1903, pi. xxii, fig. 11. 



