DESCRIPTION OP GENERA AND SPECIES. 



terior margin ; palpebral ridge low, narrow, and merging into the strong palpebral 

 lobe, which is about one-third the length of the cephalon; frontal limb narrow in 

 front of the glabella, widening at the sides in front of the palpebral ridges; it slopes 

 gently down to a rounded, shallow furrow, that separates it from a slightly convex 

 frontal rim which is broader than the frontal limb in front of the glabella ; postero- 

 lateral limb narrow, about as long as the width of the fixed cheek and marked by a 

 rather strong border and shallow furrow parallel to the border. 



Surface marked by scattered punctse, and very fine punctae visible only with 

 the aid of a strong lens. 



This species is characterized by the shallow, rounded dorsal furrow, elevated 

 palpebral lobe, and the smooth, slightly convex frontal rim. 



Formation and Locality. Upper Cambrian: (C36) Upper part of the Ch'au- 

 mi-tien limestone [Blackwelder, 19070, p. 36 (part of third list of fossils), and fig. 9 

 (bed 2), p. 35], at Ch'au-mi-tien, Ch'ang-hia district, Shan-tung, China. 



Collected by Eliot Blackwelder. 



Anomocarella bergioni Walcott. 



Plate 19. Figures 13, 130. 



Anomocare bergioni WALCOTT, 1905, Proc. U. S. Nat. Mus., vol. xxix, p. 47. (Described as a new 

 species essentially as below.) 



Cephalon, exclusive of the free cheeks, longitudinally subquadrilateral, convex. 

 Glabella truncate-conical, moderately convex, and marked in the cast by two pairs 

 of glabellar furrows; also a low, rounded median ridge; sides slightly arched out- 

 ward opposite the palpebral lobes; front broadly rounded; occipital furrow deep, 

 rounded, and arching forward slightly at the middle; occipital ring narrow and 

 rising at the center to form the base of a rather strong spine ; dorsal furrow strong at 

 the sides and less so at the front. 



Fixed cheeks very narrow, forming little more than a convex ridge between 

 the dorsal furrow and the furrow within the palpebral lobe; they slope rapidly to 

 the front, merging into the frontal limb, and posteriorly downward to a very 

 short postero-lateral limb ; palpebral lobes narrow, about one-third the length of the 

 cephalon; palpebral ridge low and merging into the rim of the palpebral lobe; 

 frontal limb short and sloping downward to a slightly convex frontal rim that is 

 about twice as wide as the frontal limb in front of the glabella; the line of demar- 

 cation between the frontal limb and rim is little more than a change in direction of 

 the slope, the slope of the rim being less. 



The outer crust is exfoliated over most of the cephalon. Where preserved the 

 outer surface is smooth under a strong lens. 



The length of the cephalon of the type specimen is 12 mm. ; the glabella, exclu- 

 sive of the occipital groove, 6 mm. ; frontal limb, i mm. ; frontal rim, 2 mm. 



This species was doubtfully referred to the genus Anomocare, as the glabella 

 did not have the parallel sides so characteristic of that genus and the palpebral lobes 

 were rather short. The reference to Anomocarella is based on the character of the 

 frontal rim, the narrow fixed cheeks, and the general configuration of the glabella. 



Formation and Locality. Upper Cambrian: (C33a) Talus near the base of the 

 cliff of Ch'au-mi-tien limestone [Blackwelder, 19070, p. 41 (part of last list of fos- 

 sils)], 9 miles (14.4 km.) north of Sin-t'ai-hien, Shan-tung, China. 



Collected by Eliot Blackwelder. 



