DESCRIPTION OF GENERA AND SPECIES. 187 



Genus ANOMOCARE Angelin. 



Anomocare ANGELIN, 1854 (edition 1878), Pal. Scandinavica, pt. i, p. 24. (Described as a new genus.) 

 Anomocare (Angelin) WALCOTT, 1911, Smithsonian Misc. Coll., vol. 57, No. 4, p. 87. (Discussed 

 essentially as below.) 



For the purpose of comparison a cranidium, free cheek, and pygidium of 

 Anomocare lave are illustrated by figures i, la-b, plate 18; also an entire dorsal 

 shield of Anomocare convexa Walcott [figs. 3, $a-c, plate 18] from the Middle Cam- 

 brian strata of Alabama. 



Genotype. Anomocare lasve Angelin [1854, edition of 1878, p. 25]. 



Anomocare alcinoe Walcott. 

 Plate 18, Figures 6, 6a-b. 



Anomocare alcinoe WALCOTT, 1905, Proc. U. S. Nat. Mus., vol. xxix, p. 47. (Described as a new 

 species essentially as below.) 



This species is represented by a single specimen, preserving the anterior portions 

 of the central part of the cephalon, exclusive of the free cheeks. These parts indi- 

 cate that the cephalon was large, moderately convex, and longitudinally quadri- 

 lateral, exclusive of the free cheeks. Glabella slightly convex, rising gently from 

 the dorsal furrow toward the center; faint indications of three pairs of glabellar 

 furrows are shown by reflected light over the smooth surface; sides subparallel to 

 the rather broadly rounded front; occipital furrow and ring unknown. 



Fixed cheeks about one-half the width of the glabella, nearly flat opposite the 

 palpebral lobes, and sloping gently to the frontal limb, into which they merge in 

 front of the palpebral lobes; the palpebral ridge, starting just back of the antero- 

 lateral angle of the glabella, extends obliquely out to the narrow palpebral lobe; 

 frontal limb nearly flat; it slopes gently from the glabella and palpebral lobes to a 

 raised line which separates it from the broad, slightly concave frontal rim. 



The surface appears to be smooth under a strong lens. 



An associated pygidium has a broad, planulate margin and convex axis, with 

 slight indications of about six segments. 



The most nearly related form from China is Coosia decelus [plate 21, figs. 8, 8']. 

 In the latter form the frontal rim is slightly convex, while in A. alcinoe it is slightly 

 concave. 



Formation and Locality. Middle Cambrian : (C 57) In limestone nodules in the 

 lower shale member of the Kiu-lung group [Blackwelder, 19070, pp. 37 and 40 (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-hien, Sin-t'ai district, Shan-tung, China. 



Anomocare convexa Walcott. 

 Plate 1 8, Figures 3, 3a~c. 



Anomocare convexa WALCOTT, 1911, Smithsonian Misc. Coll., vol. 57, No 4, pp. 87-90, plate 17, 

 figs. 2, 2a-d. (Described and discussed as a new species essentially as below.) 



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; 

 arching around the palpebral lobe, they extend downward and slightly forward a 

 short distance and then with a broad sweep curve inward, cutting the anterior 

 margin on a line with the outer edge of the palpebral lobe. Cranidium with a large 

 glabella, concave frontal limb, relatively narrow fixed cheeks, and elongate, narrow 

 postero-lateral limbs. Glabella moderately convex, with the sides gradually con- 



