K0.1458. CAMBRIAN FAUNAS OF CHINA— WALCOTT. 5B8 



Formation and locality. — Middle Cambrian, near base of Ch'ang-hia 

 formation in gra}", oolitic series; Ch'ang-hia, Shan-tiing-, China. 

 Collected by Eliot Blackwelder. 



ANOMOCARE FLAVA, new species. 



Head, exclusive of the free cheeks, quadrilateral, and moderately 

 convex. Cxlabella slightly convex in front, becoming more convex 

 toward the center, along which there is a very slightly indicated lon- 

 gitudinal ridge. A glabella 6 mm. in length has a width of 5,5 mm. at 

 the base and 4 mm. opposite the anterior edges of the ocular ridges, 

 where the rounded front begins; the posterior pair of glabellar fur- 

 rows is indicated on one specimen by a slight depression, on another, 

 two pairs of furrows are indicated by slight scars about half way 

 between the center and the sides of the glabella; occipital furrow shal- 

 low, scarcel}' more than indicating the line of division between the 

 glabella and the occipital ring; the latter rises gently toward the cen- 

 ter; dorsal furrow cleai'ly indicated at the junction of the glabella and 

 fixed cheeks, and also in front of the glabella. 



Fixed cheeks about one-third the width of the glabella, nearlj^ flat 

 back of the ocular ridges, and sloping gentl}' downward to merge into 

 the frontal limb, and backward to the posterior margin of the head; 

 ocular ridges low and rather broad, they terminate at the antero-lat- 

 eral angles of the glabella from whence they extend obliquely back- 

 ward to merge into the palpebral lobes; palpebral lobes little more 

 than one-fourth the length of the head, and rather prominent; frontal 

 limb in front of the glabella is about the same width as the frontal 

 rim, it is slightly convex to the base of the rather abrupt posterior 

 margin of the frontal rim. 



The surface is marked b\" a few minute, scattered pores, to be seen 

 only by a strong lens. The largest head has a length of 12 mm., with 

 the same width at the palpebral lobes. 



The associated pygidium has a broad, planulate margin, a narrow, 

 convex axis, with six rings, indicated b}- shallow furrows, and a ter- 

 minal segment; the furrows on the axis are extended out on the pleural 

 lobes, disappearing on the planulate margin. 



Ohservatlons. — The central portions of the head of this species ditl'er 

 from Anomocare temenus Walcott,*^ the nearest related form, in having 

 a shorter glabella in proportion to its width, a tubercle or spine of 

 unknown size on the occipital ring, and a smoother surface on the 

 glabella. The associated pygidium is much like that associated with 

 A. temenus^ but differs in having a narrower axis marked by more 

 rings. 



aProc. U. S. Nat. Mus., XXIX, 1905, p. 53. 



