NO. 1440. JS'EW PALEOZOIC OSTRACODA—ULRICH AND BASSLER. 163 



the rig-ht in a similar manner, only the overlap in this case occurs in 

 the antero-dorsal region. The anterior notch, however, is much 

 deeper and the carapace less globose in C. suhorata than in the two 

 species of Entomoconehux so far described. In its general form C. 

 suhorata agrees rather closely with C. pJiiUlpsiana Jones, but the 

 Kansas species may be distinguished at once by its much deeper ante- 

 rior notch. There are slight ditferences also in the size and location 

 of the muscle spot, and in the convexity of the valves, the ciu'ves in 

 Jones's species being more symmetrical and the carapace on the whole 

 a little thicker and with blunter edges. C. jJrvniseva (McCoy), another 

 British species, corresponds rather better in the matter of the notch 

 and also in convexit}' , but differs in outline, being more produced in 

 the post-ventral region; also in having the notch lower, which causes 

 the ])eak to project considerabh^ farther beyond the lower extremity 

 of the notch than is the case in 0. suhovata. 



Fornmtion ujkI locality. — Not uncommon in the Lawrence shale at 

 Lawrence, Kansas. 



Cotyjjes.~C?it. No. 35626, U.S.N.M. 



DESCRIPTION OF PLATE XI. 



Unless otherwise stated, all the figures on this plate are magnified twenty times. 



Figs. 1-4. Faraparchiles humerosus, new genus and species. 



Fic;. 1. Right valve showing general form of a rather large but otherwise aver- 

 age carapace. 

 '^. Anterior view showing overlap of right valve dorsally, and slight ven- 

 tral overlap of left valve. 



3. Ventral view of same. 



4. Interior of a right valve exhibiting dorsal prominence and linear socket 



for reception of corresponding portion of left valve. 

 Elendale formation, Manhattan, Kansas. 



Fig. 5. Beyricliia f radiafa Jones and Kirkby. 



Fig. 5. Right valve of an old example apparently agreeing in all essential 

 respects with the English types of the species. 

 Cottonwood shales, 2 miles east of Cottonwood Falls, Kansas. 



Fig. 6. Beyrichiaf emaciata, new species. 



Fig. 6. Right valve showing the sharply defined lobes and ridges and generally 

 emaciated appearance characterizing this species. 

 Wreford limestone, 6 miles west of Reece, Kansas. 



Figs. 7, 8. Beyrichiella boUiaformis, new species. 



Fig. 7. Left side of an entire carapace of the typical form of the species. 



8. Dorsal view of same anterior end to left, showing the channeled back. 

 Cottonwood shales, 2 miles east of Cottonwood Falls, Kansas. 



Figs. 9-11. Beyrichiella holliaformis tumida, new variety. 



Fig. 9. Left valve incomplete at the antero-dorsal angle. In this specimen the 

 surface markings are very much as in the typical form of the species, 

 but the whole anterior end is much more inflated. 



