DESCRIPTION OF GENERA AND SPECIES. 2OJ 



narrow furrow between it and the rather broad frontal rim ; the latter in a cephalon 

 21 mm. in length is 3.5 mm. long; postero-lateral limb narrow, with a length about 

 equal to the width of the base of the glabella. A strong furrow divides it about 

 midway, parallel to the posterior margin. 



Minute scattered pores are shown on the surface under a strong lens. 



The associated pygidium has a broad, planulate margin, convex axis, and slight 

 indications of three or four segments. 



The most nearly related form from China is Anomocare plamim Dames [1883, 

 p. 1 6]. This species differs from the latter in its narrower fixed cheeks and larger 

 glabella. 



Anomocare ovatnm Lorenz was based on a fragment of the cranidium that is 

 unmistakably identical with Anomocarella temenns. 



Formation and Locality. Middle Cambrian : (C 10) Lower shale member of the 

 Kiu-lung group [Blackwelder, igoja, pp. 37 and 40 (part of the third list of fossils), 

 and fig. 8a (bed 35), p. 29], about 3 miles (4.8 km.) southwest of Yen-chuang, Sin- 

 t'ai district, Shan-tung; also (022), Ch'ang-hia limestone in upper oolitic portion 

 [idem, pp. 22 and 33 (part of last list of fossils)], at Ch'ang-hia, v Shan-tung, China. 



Collected by Eliot Blackwelder. 



Also from Localities 35 n and 35 r, Middle Cambrian, 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]; collected in a low bluff on 

 the shore of Tschang-hsing-tau Island, east of Niang-niang-kung, Liau-tung, Man- 

 churia, China. 



Collected by J. P. Iddings and Li San. 



Anomocarella tenes (Walcott). 

 Plate 21, Figure 4. 



Ptychoparia tenes WAI.COTT, 1905, Proc. U. S. Nat. Mus., vol. xxix, p. So. (Species described essen- 

 tially as below.) 



Of this species only the moderately convex central portions of the cephalon are 

 known. Glabella prominent, moderately convex, narrowing very gradually toward 

 the broadly rounded front; furrows only faintly indicated; occipital ring strong 

 and bearing the broad base of a spine that extends obliquely upward and backward; 

 occipital furrow shallow on the sides and scarcely perceptible at the center; dorsal 

 furrow rounded and clearly defined. 



Fixed cheeks slightly convex and about one-third the width of the glabella; 

 the length of the palpebral lobes is about one-third the distance from the posterior 

 to the front margin; palpebral ridge low, broad, and marking quite distinctly the 

 division between the lateral fixed cheeks and the rather abrupt, downward slope of 

 the short frontal limb, which merges into the rather broad, flat frontal rim. 



Surface minutely granulose under a strong lens. 



The largest cephalon in the collection has a length of about 6 mm., exclusive of 

 the occipital spine. 



This species is distinguished by the strong occipital spine, large eye-lobes, nar- 

 row fixed cheeks, and the form of the frontal rim. 



Formation and Locality. Middle Cambrian: (C'28) Thin-bedded oolitic lime- 

 stone at the base of the Ch'ang-hia limestone [Blackwelder, 19070, p. 32 (first list of 

 fossils), and fig. 6 (bed 20), p. 25], just above the shales in the face of the cliff, i mile 

 (1.6 km.) east-southeast of Ch'ang-hia, Shan-tung, China. 



Collected by Eliot Blackwelder. 



