142 RESEARCH IN CHINA. 
Formation and Locality—Middle Cambrian: (C18) Dark gray oolitic lime- 
stone about 400 feet (120 m.) above the base of the Ch’ang-hia limestone [Black- 
welder, 19074, p. 33 (third list of fossils)], in cliffs 1 mile (1.6 km.) east of Ch’ang-hia, 
Shan-tung, China; also (C71), massive cliff-making limestone in the central portion 
of the Ki-chéu formation [Willis and Blackwelder, 1907, pp. 139 and 145 (second 
list of fossils)], 4 miles (6.4 km.) southwest of Tung-yii, Shan-si, China. 
Collected by Bailey Willis and Eliot Blackwelder. 
This species appears to be present in the two following localities, but the mate- 
rial is too poor to decide with certainty: 
Middle Cambrian: (C21) Ocher-mottled phase of purple-gray limestone in 
the middle of the oolitic Ch’ang-hia formation [Blackwelder, 1907a, p. 33 (second 
list of fossils)], at Ch’ang-hia, and (C26) near the top of the black oolite group in 
the uppermost layers of the Ch’ang-hia limestone [idem (part of the last list of 
fossils)], 2 miles (3.2 km.) north-northeast of Ch’ang-hia, Shan-tung, China. 
Collected by Eliot Blackwelder. 
Crepicephalus magnus Walcott. 
Plate 13, Figures 15, 15a—b. 
Crepicephalus magnus WALCOTT, 1905, Proc. U.S. Nat. Mus., vol. xx1x, p. 93. (Described as a new 
species essentially as below.) 
The only portions of this species in the collection are a fragment of the posterior 
portion of the glabella and the outer portion of a large free cheek; the fragment 
shows that the glabella has a width at the base of 12 mm.; also, that there was a 
narrow, strong occipital groove and an occipital ring over 3 mm. in width. 
The surface of the fragment of the glabella is marked by strong pustules, which 
give it a somewhat granulose appearance. ‘The cast of the fragment of the interior 
of the free cheek indicates that it was pustulose and that the postero-lateral angle 
terminated in a long, curved spine. 
The two fragments described are so distinctly marked by the coarse granulation, 
and the free cheek by its curved terminal spine, that there is little danger of con- 
fusing it with any other species. 
Formation and Locality—Middle Cambrian: (C48) Near the top of the cliffy 
oolitic limestone in the Ch’ang-hia limestone [Blackwelder, 1907a, p. 32 (part of 
last list of fossils)], at Ch’au-mi-tién, Shan-tung, China. 
Collected by Eliot Blackwelder. 
At a higher horizon in the Ch’ang-hia limestone a portion of a free cheek 
[fig. 15a] and a fragment of a glabella occur that may belong to this species. 
Formation and Locality.—Middle Cambrian: (C25) Limestone about 50 feet 
(15 m.) below the Ku-shan shale in the uppermost beds of the Ch’ang-hia formation 
[Blackwelder, 19074, p. 33 (part of the last list of fossils)], at Ch’ang-hia, Shan-tung, 
China. 
Collected by Eliot Blackwelder. 
Fragments of a strongly tuberculated free cheek occur in the Ch’ang-hia lime- 
stone at a horizon between (C48) and (C25) that appear to be similar to fragments 
of the free cheek from these horizons. 
Formation and Locality——Middle Cambrian: (C18) Dark gray oolitic lime- 
stone about 400 feet (120 m.) above the base of the Ch’ang-hia limestone [Black- 
welder, 19074, p. 33 (third list of fossils)], in cliffs 1 mile (1.6 km.) east of Ch’ang- 
hia, Shan-tung, China. 
Collected by Eliot Blackwelder. 
