DESCRIPTION OF GENERA AND SPECIES. 109 



Ch'ang-hia, ((.'29) near the top of the cliffy limestone in the Ch'ang-hia limestone 

 [Blackwelder, 19070, p. 32 (part of last list of fossils)], i mile (1.6 km.) west of 

 Ch'ang-hia, (C80) layer in black oolite of the Ch'ang-hia limestone [idem, p. 33 

 (part of first list of fossils)], 25 feet (7.5 m.) above the second cliff at an elevation 

 of 1,700 feet (568.9 in.) on top of the long north-and-south ridge at Ch'ang-hia, 

 and (024) near top of black oolite group in the uppermost layers of the Ch'ang- 

 hia formation [idem (part of last list of fossils)], 2 miles (3.2 km.) east of Ch'ang- 

 hia, Shan-tung, China; also (0 1 and 02), lower shale member of the Kiu-lung group 

 [idem, pp. 37 and 40 (part of the third list of fossils), and fig. 10 (beds 4 and 5), 

 p. 38], 2 miles (3.2 km) south of Yen-chuang, Sin-t'ai district, (057) limestone 

 nodules in the lower shale member of the Kiu-lung group [idem (first list of fos- 

 sils)], 3 miles (4.8 km.) south of Kao-kia-p'u, and 4 miles (6.4 km.) north of Sin- 

 t'ai-hien, Sin-t'ai district, Shan-tung, and (071) massive cliff -making limestone in 

 the central portion of the Ki-chou formation [Willis and Blackwelder, 1907, pp. 139 

 and 145 (second list of fossils)], 4 miles (6.4 km.) southwest of Tung-yu, Shan-si, 

 China. 



Collected by Eliot Blackwelder, Bailey Willis, and Li San. 



Also from the following: (35 n and 35 r) Fu-chou series; limestones near the 

 base of the series just above the white quartzite [see Blackwelder, 19076, p. 92, for 

 general section giving stratigraphic relations], and (35 p), shales about So feet (24 m.) 

 above the white quartzite [see idem], all three collected in a low bluff on the shore of 

 Tschang-hsing-tau Island, east of Niang-niang-kung, Liau-tung, Manchuria, China. 



Collected by J. P. Iddings and Li San. 



Dorypyge richthofeni laevis Walcott. 



Plate 8, Figures 2, 2a-b. 



Dorypyge richthofeni lavis WALCOTT, 1906, Proc. U. S. Nat. Mus., vol. xxx, p. 573. (Variety 

 characterized.) 



This variety is characterized by a nearly smooth surface. An associated pygid- 

 ium and cephala of D. richthofeni Dames have tubercles over most of the surface. 



Formation and Locality. Middle Cambrian: (071) Massive cliff-making lime- 

 stone in the central portion of the Ki-chou formation [Willis and Blackwelder, 1907, 

 pp. 139 and 145 (second list of fossils)], 4 miles (6.4 km.) southwest of Tung-yu, 

 Shan-si, and (0 72) thin green-gray limestone interbedded with ocherous and green 

 clay shales, overlying the massive oolite in the Ki-chou formation [idem (third list 

 of fossils)], 4 miles (6.4 km.) east of Fang-lan-chon, Shan-si, China. 



Collected by Eliot Blackwelder. 



Genus TEINISTION Monke. 



Teinislion MONKE, 1903, Jahrb. konigl. Preuss. Geol. Landesanstalt und Bcrgakademie, vol. xxni, 



pt. i, p. 117. (Genus described and discussed.) 

 Dorypygella WALCOTT, 1905, Proc. U. S. Nat. Mus., vol. xxix, p. 29. (Genus described and discussed 



as a new genus.) 



Cephalon transversely semicircular, with a truncato-conical glabella, having 

 a postero-lateral lobe in the dorsal furrow, and a narrow frontal rim and border; 

 fixed cheeks medium to broad, with relatively large, elevated palpebral lobes; facial 

 sutures, cutting the anterior rim in front of the anterior base of the eye-lobe, extend 

 inward and backward in a slight outward curve to the eye-lobe ; arching about the 

 eye-lobe they extend outward and backward with a sigmoid flexure, cutting the pos- 

 terior rim within the postero-lateral angle. 



