Page:Walcott Cambrian Geology and Paleontology II.djvu/137

NO. 4 shield of the various species are available for comparison other differences will be found to exist between Inouyia and Agraulos.

In grouping the Chinese species under Inouyia some are found to be close to Agraulos, notably I. abaris (Walcott), I. acalle (Walcott), and I. regularis (Walcott), and it is probable that with more complete specimens of the species they will be referred to a subgenus intermediate between Inouyia and Agraulos.

The wide fixed cheeks of Inouyia capax are confined to this species, as all other species referred to Inouyia have relatively narrow fixed cheeks. The large eye of I. ? inflata (Walcott) and relatively narrow frontal limb serve to place it apart from the other species.

I am not at all satisfied with the arrangement of species under Inouyia but in dealing with such fragmentary specimens much must be left to future discovery and closer work.

Attention is also called to Ellipsocephalus hoffi Barrande as in that species the frontal limb is convex and the glabella subrectangular.

The generic name is given in recognition of Dr. Kinos Ka Inouye, Director of the Imperial Geological Survey of Japan.

This species is represented by two broken specimens of the cranidium. These show that the glabella is much like that of Inouyia titiana (Walcott), also the fixed cheeks and palpebral lobes. It differs in the transverse swelling of the frontal limb. In I. ? thishe the frontal limb rises with a slight slope in front of the glabella, and curves gently downward to the margin without a trace of a frontal border as in Inouyia inflata (Walcott). In I. titiana the frontal limb is abruptly convex and there is an almost flattened border.

The surface of I. ? thisbe is distinctly punctate and in this respect resembles Agraulos dryas.

The type specimen of the cranidium has a length of 5.5 mm.

Formation and locality.—Middle Cambrian: (C28) thin bedded oolitic limestone at the base of the Ch'ang-hia limestone, just above the shales in the face of the cliff one mile (1.6 km.) east-southeast of Ch'ang-hia, Shan-tung, China.

Collected by Eliot Blackwelder.