Page:Walcott Cambrian Geology and Paleontology II.djvu/143

NO. 4

The second Canadian species associated with Levisia richardsoni is Levisa nasuta. The glabella of this species is very convex; fixed cheeks narrow and merging anteriorly into the bluntly pointed frontal limb and margin. A dorsal view of the cranidium is given on plate 17, figure 5, and the accompanying text figures show a front and side view of the specimen represented on plate 17.

Anomocare, 1854, Paleontologia Scandinavica, Edition of 1878, p. 24.

For the purpose of comparison a cranidium, free cheek, and pygidium of Anomocare læve are illustrated by figs. 1, 1a-c, pl. 17; also an entire dorsal shield of Anomocare convexa, new species (figs. 2, 2a-d, pl. 17), from the Middle Cambrian strata of Alabama.

Genotype.—Anomocare læve Angelin (1854, edition of 1878, p. 25).

Dorsal shield large, elliptical in outline; axial lobe narrow and convex; cephalon semicircular in outline with the genal angles produced into spines. The facial sutures cut the posterior margin a short distance within the genal angles and extend inward with a slight curvature and forward to the base of the palpebral lobe;