DESCRIPTION OF GENERA AND SPECIES. 2187, 
I find in the large series of specimens in our collections that the test is finely 
punctate as in Anomocare, but that in others it is not possible to observe the puncte. 
This is especially true of the specimens that have been compressed in the limestone. 
One of the specimens of the cephalon of this species, described by Lorenz as Bathy- 
uriscus asiaticus [see plate 22, fig. 2a], shows both smooth and punctate surface, 
according to the condition of preservation. 
Formation and Locality—Middle Cambrian: (C1 and C2) Lower shale member 
of the Kiu-lung group [Blackwelder, 1907a, 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, and (C4) limestone nodules at the base of the lower shale member 
of the Kiu-lung group [idem, second list of fossils], 3 miles (4.8 km.) southwest of 
Yen-chuang, Sin-t’ai district, Shan-tung, China. 
Collected by Eliot Blackwelder. 
Also from Locality C19, uppermost layers of the Ch’ang-hia limestone [Black- 
welder, 19074, p. 33 (part of last list of fossils)], at Ch’ang-hia, Shan-tung, China. 
Collected by Li San. 
Also from Locality C57, limestone nodules in the lower shale member of the 
Kiu-lung group [Blackwelder, 1907a, pp. 37 and 4o (first list of fossils)], 3 miles 
(4.8 km.) south of Kao-kia-p’u, and 4 miles (6.4 km.) north of Sin-t’ai-hién, Sin-t’ai 
district, Shan-tung, China. 
Also from localities: (850) Fu-chéu series, shales about 130 feet (40 m.) above 
the white quartzite [see Blackwelder, 1907), p. 92, for general section giving strati- 
graphic relations| collected in drainage cuts a short distance back from the bluff 
forming the shore of Tschang-hsing-tau Island; (85p), shales about 80 feet (24 m.) 
above the white quartzite [see idem], and (85r) limestones near the base of the 
series just above the white quartzite [see idem], the latter two 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. 
Dolichometopus derceto Walcott. 
Plate 22, Figures 4, 4a. 
Dolichometopus derceto WALCOTT, 1905, Proc. U. S. Nat. Mus., vol. xxix, p. 95. (Described as a new 
species as below.) 
This species is known only by the central portions of the cephalon, exclusive 
of the free checks. Glabella moderately convex and expanding slightly in width 
from the base to the rounded front; the surface is marked by two pairs of rather 
strong, short furrows opposite the palpebral lobe; occipital furrow strong and rather 
deep; occipital ring narrow at the sides, rising and widening to form the base for 
a small, sharp occipital spine; dorsal furrow strong on the sides of the glabella. 
Fixed cheeks narrow, convex; palpebral lobe narrow, elongate, almost touching 
the dorsal furrow in front; postero-lateral limb of medium length, marked by a strong 
furrow parallel to the posterior margin; frontal limb narrow, slightly concave, and 
almost concealed by the overhanging, almost tumid frontal portion of the glabella. 
Surface smooth under a strong lens. 
The largest of the three cephala representing this species has a length of 7 mm., 
exclusive of the occipital spine. 
Formation and Locality—Middle Cambrian: (C1 and C2) Lower shale member 
of the Kiu-lung group [Blackwelder, 19074, 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, Shan-tung, China. 
Collected by Eliot Blackwelder. 
