Page:Walcott Cambrian Geology and Paleontology II.djvu/133

NO. 4 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.

Stephanocare sp. , 1903, Jahrb. König. Preuss. Geol. Landesanst. und Bergakad., Vol. 23, Pt. 1, p. 144, pl. 8, figs. 1, 1a, 2-4. (Described and discussed.)

Doctor Monke doubtfully refers a cephalon, two pygidia, and a free cheek to Stephanocare. Similar pygidia occur on the platy limestones collected by Mr. Blackwelder and as they are clearly distinct from any described species I give them the specific name of S. ? monkei in recognition of the most excellent work done by Doctor Monke on this interesting fauna. The generic reference is in doubt as we have no entire specimens of Stephanocare richthofeni Monke and of this species for comparison.

Formation and locality.—Middle Cambrian: (C6) thin slabby limestone in the upper shale member of the Kiu-lung group, 2.5 miles (4 km.) southwest of Yen-chuang, Sin-t'ai District, Shan-tung, China.

Collected by Eliot Blackwelder.

Ptychoparia granulosa, 1905, Proc. U. S. National Museum, Vol. 29, p. 78. (Species described as below. This species is believed to be congeneric with Hall and Whitfield's species; since the name granulosa is therefore preoccupied for Ptychoparia, granosa is proposed.)

Not Crepicephalus (Loganellus) granulosus and, 1877, Geol. Expl. Fortieth Parallel, Vol. 4, p. 214, pl. 2, figs. 2, 3.

The gently convex central portions of the cephalon, exclusive of the free cheeks, are all that is known of this species. These indicate a rather broad, semicircular cephalon, with small free cheeks, wide fixed cheeks, narrow, short, convex glabella, and narrow, flattened frontal rim; glabella marked by three pairs of faintly impressed but clear glabella furrows; frontal space between the glabella and rim broader than the frontal rim and slightly convex; palpebral ridge narrow, clearly defined, and merging into a rather small eye lobe.

Surface finely granulose.