<iv) 32 Palseontologia Sinica SeJ-. B. 



Genus StephANOCARE Monke 

 Stephanocare richthofeni Monke 



Plate IT, Figs. 6a-c. 



1903 Stephanocare richthofeni Monke, Jahrb. Konigl. Preups. Geol. Landesanstalt, und Bergakademie, 

 Vol. XXIII, pt. 1, p. 136, plate 7, fig. 1-17, plate 8 fig. 1-1 1. (Species described and discussed 

 as a new species and the genotype) . 



1905 Damesella chione Walcott, Proc. U. S. Nat. Mus., Vol. XXIX, p- 40. (species described and referred 

 to Damesella) . 



1913 Stephanocare richthofeni Monke Walcott, Research in China, Vol. 3, p. 114, PI- 7, fig. 17, 17a-f. 



Drs. Monke and Walcott deacribed this species very fully. From the Lincheng 

 material only one large cranidium, one hypostoma and a small pygidium probably of this 

 species are known. 



Cephalon transversely semicircular, moderately convex. Glabella convex, trun- 

 cato-conical, slightly rounded in the front, the length is slightly greater than the width 

 at the base; a posterior pair of glabellar furrows strong and deep extending obliquely 

 inward and backward; a second pair of glabellar furrows very slighly impressed and 

 short; the space between the second pair of furrows and the posterior furrows is a little 

 wider than that between the first pair and the second pair. A third pair is faintly indi- 

 cated. Occipital furrow narrow, transverse, clearly defined; occipital ring not well 

 shown owing to the strongly weathered character of the specimen ; dorsal furrow narrow 

 and distinct. 



Fixed cheeks less than one half the width of the glabella at the base, and moder- 

 ately convex ; they round up from the dorsal furrow to the palpebral lobe ; back of the 

 line of which they slope gently to the furrow of the postero-lateral limb, and to the front 

 furrow within the frontal margin. Palpebral lobe not shown. Postero-lateral limb nar- 

 row and extending over a considerable distance to a rather blunt, rounded end; frontal 

 rim in the form of a straight strongly scalloped ridge, with broadly rounded concave 

 scallops pointing forward and separated by spine-like ridges which project at right angle 

 to the frontal margin and are usually seven in number on the cranidium; frontal margin 

 separated from the glabella and fixed cheeks by a harrow furrow which is scalloped for- 

 ward in conformity with the scallops of the frontal rim. In front of the palpebral lobe 

 the facial suture extends forwaird and slightly outward to the frontal margin. Postero- 

 lateral furrows broad and distinct. Posterior rim scarcely scalloped . 



An associated hypostoma referred to this species is very marked. Central por- 

 tion subovate and convex; bordered by a narrow ridge on the side and the posterior por- 



