﻿ii3 Paleontology 35 



Pleurotomaria sp. 

 PL IV fig. 2. 



The collection contains eight or ten specimens too imperfect 

 for complete description. The spire consists of four or five 

 whorls reaching an elevation two or two and a half times the 

 diameter of the base of the shell. Two strong revolving lines 

 mark the whorls; these are placed rather close together and 

 appear to border the slit band, the uppermost following the 

 median line of the whorl. An angular shoulder stands midway 

 between the upper margin and the middle of the whorl. This is 

 occupied by small, closely placed nodes. 



Locality. — Logan, Utah. g.g 



Loxonema nobile Walcott. 

 PI. IV fig. 3. 

 The collection contains a single specimen of a large, robust 

 form apparently identical with this species. The surface mark- 

 ings are not preserved. 



Locality. — Flat Iron Mountain, Lewis and Clark Forest 

 Reserve, Montana. 



OSTRACODA 



Bythocyp ris f s p . 



PI. IV fig. 4. 



A small, minutely granulose ostracoid occurs in the Utah collec- 

 tion. An average specimen shows a length of i}4 mm. and 

 width of 1 mm., with rather gibbous valves. It probably belongs 

 to the genus Bythocypris and suggests the Devonian variety of 

 B. phillipsiana Jones and Hall. The Utah specimen differs 

 mainly in the greater development of the ventral border in the 

 overlapping valve. 



Locality. — Paradise P. O., Utah. 



