44G NEW GENERA AND SPECIES OF CAMBRIAN FOSSILS. 



on the pleurae are narrower. In oue of the large specimens the surface 

 of the glabella is covered with tine, irregular elevated striae. 



Through the kindness of Dr. Karl ffcoaiinger I have the opportunity 

 of studying this species. 



Formation and locality : Middle Cambrian, 2,000 feet above the Ole- 

 nellus zone, in the Mt. Stephen section, British Columbia. 



Bathyuriscus (Kootenia) dawsoni u. sp. 



/:<ith>ntrux (?) Rominger 1887. Froo. Acad. Nat, Sci. Phila,,pt. 1, p. 18, pi. i, fig. 8. 



General form ovate, broadest across the back of the head, strongly 

 trilobed, although flattened in the shale. Head broad, semicircular in 

 outline. Glabella broadly rounded in front; sides snbparallel; surface 

 convex and not showing any lateral furrows; occipital furrow and ring 

 well defined. Frontal rim very narrow. Fixed cheek broad, and crossed 

 by a narrow ocular ridge that extends obliquely forward from the eye 

 to near the anterior angle of the glabella; postero lateral limbs large, 

 subtriangular ; anterior lateral limb short. Eye lobe small. Free 

 cheeks unknown. 



Thorax with seven segments; median lobe convex and with a spine 

 at the center of each segment; pleurae flattened two thirds of their 

 length and then bend downward aud outward to their rounded ends; 

 pleural grooves broad to the point of tapering from the geniculation 

 outward; anterior lateral' facet slighth* developed. 



Pygidium large; median lobe prominent and extending the entire 

 length to the posterior margin ; it is crossed by fine rings that have a 

 spine at the center of each ; the terminal ring is short; lateral lobes 

 with four anchylosed segments, distinctly outlined ; margin narrow. 



This species is a link between the genera Protypus and Asaphiscus. 

 It has the type of head of the former aud the thorax and pygidium of 

 the latter. 



The subgeueric name, Kootenia, will probably be raised to a genus 

 in a final report. The specific name is given in honor of Dr. George M. 

 Dawson, of the geological survey of Canada. 



Formation and locality : Middle Cambrian, 2,000 feet above the Ole. 

 nellus horizon, Mt. Stephen section, British Columbia. Collection of 

 Dr. Karl Komiuger. 



Ogygopsis u. gen. 



This genus is founded on the species Ogygia Motzi Bominger. 1 It 

 differs from Ogygia in having a well-defined ocular ridge and in the 

 narrow palpebral lobe. In other respects it is identical with Ogygia, 

 as represented by O.buchi. 



' Proc. Acad. Nat. Sci. Phila., pt. 1, 1887, pp. 12, 13, pi. i, fig. 1. 



