114 RESEARCH IN CHINA. 



(second list of fossils), and fig. 10 (bed 12), p. 38], 2.5 miles (4 km.) southwest of 

 Ycn-chuang, Sin-t'ai district, Shan-tung, China. 

 Collected by Eliot Blackwelder. 



Stephanocare richthofeni Monke. 



Plate 7, Figures 17, ija-f. 



Stephanocare richthofeni MONKE, 1903, Jahrb. konigl. Preuss. Geol. Landesanstalt und Bergakademie, 

 vol. xxm, pt. i, p. 136, plate 7, figs. 1-15. (Species described and discussed as a new species 

 and the genotype.) 



Damesella chione WALCOTT, 1905, Proc. U. S. Nat. Mus., vol. xxix, p. 40. (Species described and 

 referred to Damesella.) 



Of this species there are several well-preserved central portions of the cephalon, 

 free cheeks, and pygidia. 



The cephalon is transversely semicircular, moderately convex. Glabella 

 convex, truncato-conical, rounded in front ; the length is slightly greater than the 

 width at the base ; a posterior pair of glabellar furrows extends inward and obliquely 

 backward a short distance, so as to outline a small, oval, slightly convex lobe at 

 the postero-lateral angles; a second pair of very slightly impressed, short glabellar 

 furrows occurs about half way between the posterior furrows and the front; and a 

 third pair of furrows is indicated on some examples ; occipital furrow narrow, trans- 

 verse, clearly defined ; occipital ring narrow at the sides ; increasing in width toward 

 the center, slightly convex, and a little elevated at the back; the posterior margin 

 shows a number of short, strong spines ; the largest number seen is eight, four on each 

 side of the center; dorsal furrow narrow and distinct. 



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

 ately convex; they round up from the dorsal furrow and are nearly flat out to the 

 palpebral lobe, back of the line of which they slope gently to the furrow of the pos- 

 tero-lateral limb, and in front more abruptly to the furrow within the front margin ; 

 palpebral lobe a little more than one-third the length of the cephalon, narrow, 

 distinct, but not rising above the general level of the fixed cheek; palpebral ridge 

 indicated only by a very narrow, smooth line between the anterior end of the palpe- 

 bral lobe and the dorsal furrow; postero-lateral limb narrow and extending out 

 a considerable distance to a rather blunt, rounded end; its posterior margin is 

 ornamented with short, strong spines, that are usually broken away; front margin 

 of the cephalon badly preserved; it appears to have been short, rounded, and separ- 

 ated from the glabella and fixed cheeks by a narrow furrow. 



Free cheeks subtriangular in outline, with a distinct, narrow, slightly elevated 

 border and a sharp postero-lateral spine ; the posterior border within the genal spine 

 has three or four short, strong spines corresponding to the spines of the posterior 

 border of the central portions of the cephalon ; the outer margin was provided with 

 short, strong spines that are usually broken off from the specimens in the collection; 

 from the base of the spine an inner flattened border originates and narrows to a 

 point below the front of the eye-lobe; it is defined by a narrow furrow within the 

 sharp rim, and the furrow between it and the central portion of the cheek ; it is marked 

 by granules in the same manner as the body of the cheek ; the narrowing and dis- 

 appearance of the flat border, leaving only the narrow rim at the facial suture, 

 indicate that the border in front of the fixed cheeks of the glabella was very narrow; 

 body of the cheek moderately convex, rounding up from the furrow at its base to 

 the base of the strong eye-lobe; the facial suture extends with a slightly sigmoid 

 curve from the posterior base of the eye-lobe outward and backward to the furrow 

 within the rather broad posterior margin of the free cheek; it there cuts directly 



