DESCRIPTION OF GENERA AND SPECIES. 195 
Yen-chuang, Sin-t’ai district, Shan-tung, China, and is associated with Coosia ? 
bianos [plate 21, figs. 10, 10a]. 
Collected by Eliot Blackwelder. 
The second [(b) fig. 5], (C5) Middle Cambrian: Lower limestone member of the 
Kiu-lung group [Blackwelder, 1907a, pp. 37 and 39 (first list of fossils), and fig. 8a 
(bed 30), p. 29], 3.2 miles (5.1 km.) southwest of Yen-chuang, Sin-t’ai district, 
Shan-tung, China, is associated with Anomocarella butes [plate 19, figs. 7a-d]. 
Collected by Eliot Blackwelder. 
The same species also occurs at Locality C8, Middle Cambrian, brown sand- 
stone and limestone nodules in brown micaceous shales near the top of the Man-t’o 
formation |Blackwelder, 19074, fig. 8a (bed 27), p. 29], 3.4 miles (5.4 km.) southwest 
of Yen-chuang, Sin-t’ai district, Shan-tung, China. 
Collected by Eliot Blackwelder. 
The third [(c) figs. 3, 3a], (C46) Middle Cambrian, light gray, crystalline lime- 
stone in the Ch’ang-hia limestone [Blackwelder, 19074, p. 33 (fourth list of fossils)], 
at Ch’au-mi-tién, Shan-tung, China, is associated with Dolichometopus dirce [plate 
22, figs. 5, 5a-b]. Nocephalon of Avoniocare has been found in this association. 
Collected by Eliot Blackwelder. 
The fourth [(d) fig. 6] is associated at the same stratigraphic horizon with Levisia 
adrastia and Menocephalus agave. Locality (C30), Middle Cambrian, layer in black 
oolite of the Ch’ang-hia limestone [Blackwelder, 1907a, 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 m.) 
on top of the long north and south ridge at Ch’ang-hia, Shan-tung, China. 
Collected by Eliot Blackwelder. 
Genus ANOMOCARELLA Walcott. 
Anomocarella WALCOTT, 1905, Proc. U. S. Nat. Mus., vol. xxix, p. 54. (Genus characterized.) 
Anomocarella WaLcorr, 1911, Smithsonian Mise. Coll., vol. 57, No. 4, p. 91. (Described and dis- 
cussed essentially as below.) 
Anomocarella was proposed to include species from the Middle Cambrian of 
China, that differ from Anomocare in the absence of glabellar furrows and the pres- 
ence of a relatively narrow, flattened frontal rim. The sides of the glabella are par- 
allel, palpebral lobes of medium size, and palpebral ridges more or less clearly defined. 
The associated pygidium has a narrow, conical axis, marked by several transverse 
furrows which extend out on the pleural lobes and more faintly on the sloping rim. 
Genotype.—Anomocarella chinensis Walcott. 
The type of this genus has ten segments in the thorax, with a broad pleural 
furrow that starts near the inner anterior margin of a segment, broadens very 
rapidly, and extends out beyond the geniculation before gradually narrowing to a 
point. In Anomocarella smithi [plate 19, fig. 16] there are twelve segments in the 
thorax with the same type of pleural furrow. 
Anomocarella albion Walcott. 
Plate 20, Figures 1, 1a-f 
Anoniocarella albion WALCOTT, 1905, Proc. U.S. Nat. Mus., vol. xxrx, p.54. (Species described as below.) 
Anomocarella contigua WaLcort, 1906, idem, vol. xxx, p.584. (Species characterized.) 
This species is represented by three more or less imperfect specimens of the 
cephalon, exclusive of the free cheeks. These indicate that the cephalon was of 
moderate convexity and semicircular in outline. Glabella moderately convex, with 
