366 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



in Other cephala divided into a short frontal hmb and a narrow, 

 slightly upturned rim. 



The largest cephalon in the collection has a length of 17 mm. 



This species differs from the type of the genus, D. sueciciis Angelin 

 [1852, Ed. 1878, p. 73], in the greater convexity of the glabella, more 

 convex frontal limb, and other minor details of the glabella and fixed 

 cheeks; from D. {?) dirce (pi. 54, fig. 5) it differs in the greater 

 expansion of the glabella in front, and from D. {?) derceto (pi. 54, 

 fig. 4) in the configuration of the frontal limb. 



Bathyttriscus asiaticus Lorenz (see pi. 54, figs, id, 2) is founded 

 on specimens of the cranidium that are more or less flattened by 

 compression. Amphoton steinnianni Lorenz was founded on small, 

 convex cranidia. Both forms are abundantly represented among the 

 specimens of Dolichometopus {?) deois both in Shan-tung and 

 Manchuria. 



Through the courtesy of Dr. Deecke, of the University of Frei- 

 burg, I had the opportunity of directly comparing the specimens of 

 Lorenz with the type specimens of D. {?) deois. 



I find in the large series of specimens in our collections that the 

 test is finely punctate as in Anomocare, but that in others it is not 

 possible to observe the punctae. This is especially true of the speci- 

 mens that have been compressed in the limestone. One of the 

 specimens of the cranidium of this species, described by Lorenz as 

 Bathyuriscus asiaticus (see pi. 54, fig. id), shows both smooth and 

 punctate surface, according to the condition of preservation. 



Formation and locality. — Middle Cambrian: (Ci and C2) Lower 

 shale member of the Kiu-lung group,^ 2 miles (3.2 km.) south of 

 Yen-chuang, Sin-t'ai district, and (C4) limestone nodules at the base 

 of the lower shale member of the Kiu-lung group," 3 miles (4.8 km.) 

 southwest of Yen-chuang, Sin-t'ai district, Shan-tung, China. 



Also from locaHty C19, uppermost layers of the Ch'ang-hia lime- 

 stone," at Ch'ang-hia, Shan-tung, China. 



Also from locality C57, Hmestone nodules in the lower shale 

 member of the Kiu-lung group,^ 3 miles (4.8 km.) south of Kao- 



^ Blackwelder, Research in China, Pub. No. 54, Carnegie Inst, of Washington, 

 Vol. I, Pt. I, 1907, pp. 37 and 40 (part of the third Hst of fossils), and fig. 10 

 (beds 4 and 5), p. 38. 



" Idem, second list of fossils. 



' Idem, p. 33 (part of last list of fossils). 



*Idem, pp. 37 and 40 (first list of fossils). 



