1888.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 443 



is illustrated and other species referred to the semis, some of which 

 were subsequently separated and placed under the genus Zacanthoides. 1 

 I mentioned, when the latter name was proposed, that Dorypyge, Dames 

 was congeneric with Oleuoides of Meek. Before I had met with the 

 proposed name Olenoides, I had given a provisional generic name in 

 manuscript to the group of species which were subsequently placed 

 under Olenoides, in 18SG. 3 This was before I knew of the proposed 

 genus Dorypyge, although the latter was published in 1S83. 3 



A comparison of the figures illustrating the type of the genus Dory- 

 pyge, D. richthofeni,* with Olenoides nevadensis, 0. quadriceps? 0. wasatch- 

 ensis, and 0. curticei, shows that they are congeneric, although the sur- 

 face of I), richthofeni is granulated and the test of the other species is 

 very thin and smooth, as far as known. 



The species included under the genus are Olenoides nevadensis Meek, 

 O. quadriceps H. & W., D. icahsatchensis H. & W. 0. curticei n. sp., 

 0. marcoui Whitfield, an undescribed species from northern Arizona, 

 and one from the Coosa Valley, Alabama. Of the seven species 0. mar- 

 coui and 0. quadriceps are in association with the genus Oleuellus. The 

 undescribed species from Arizona is from strata high up in the Cam- 

 brian, and the remainiug four are from strata between the Lower Cam- 

 brian or Oleuellus zone and the Upper Cambrian or Dicellocephalus 

 (Oleuus) zone. 



Olenoides nevadensis Meek. 



Paradoxides ? nevadensis Meek, 1870. Proc. Acad. Nat. Sci. Phil, vol., xxii, p. 62; 



idem, 1877. Geo]. Expl. Fortieth Par., vol. iv, p. 23, pi. 1, fig. 5. 

 Olenoides nevadensis Walcott. Bull. U. S. Geol. Survey, No. 30, p. 181, pl.xxv, fig. 7, 



1886. 



The type specimen was found in a bluish-gray calcareous shale, at 

 Antelope Spring in the House Range of western Utah. Mr. McCon- 

 nell, Mr. Otto J. Klotz, and Dr. Romiuger collected the species from a 

 bluish-gray calcareous shale at Mt. Stephen, in the Rocky Mountains of 

 Eritish Columbia, on the line of the Cauadiau Pacific Railway. 



Olenoides curticei n. sp. 



This is a large, fine species that approaches 0. nevadensis in its gen- 

 eral characters, and differs in the details of the head and pygidium, as 

 shown in the accompanying figure. 



0. curticei was collected by Dr. Cooper Curtice in the Cambrian 



1 Am. Jour. Sci., 3d ser., vol. xxxvi, p. 1(1."), 1883. 

 -Bull. U. S. Geol. Survey, No. 30, p. 181, 1886. 



3 China, Kichthofeu, vol. iv, p.24. The work coutaiuiug it was not accessible to 

 rue until late in the year 1885, after the text of Bulletin No. 30 had been printed 

 {Bull. U. S. Geol. Survey, No. 30, p. 221, 1886). 



4 China, Riehthofeu, taf. 1 figs. la-6. 



5 Bull. U. S. Geol. Survey, No. 30, pi. xxix, figs. 1-c. 



