DESCRIPTION OF GENERA AND SPECIES. 113 



The transverse front of the cephalon of this species suggests the cephalon of 

 Conocephalites frequens Dames [1883, p. 7], but the glabella is entirely different 

 in form. It differs from Teinistion alcon (Walcott) [p. no] and T. lansi Monke 

 [p. in] by the narrower free cheeks and glabella and the form of the frontal rim. 



Formation and Locality. Middle Cambrian: (C12) Gray limestone near the 

 top of the middle limestone member of the Kiu-lung group [Blackwelder, 19070, 

 pp. 37 and 41 (part of the first list), and fig. 10 (bed 7), p. 38], 3.25 miles (5.2 km.) 

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



Collected by Eliot Blackwelder and Li San. 



Also from Locality (36f) Middle Cambrian: Fu-chou series; about 1,000 feet 

 (305 m.) above the white quartzite [see Blackwelder, 19076, p. 92, for general strati- 

 graphic relations] ; collected in a low bluff on the shore of Tschang-hsing-tau Island, 

 east of Niang-niang-kung, Liau-tung, Manchuria, China. 



Collected by J. P. Iddings and Li San. 



Genus STEPHANOCARE Monke. 



Stephanocare MONKE, 1903, Jahrb.konigl.Preuss.Geol.Landesanstaltund Bergakadcmie zu Berlin, veil. 



xxiu, pt. T, p. 136. (Genus described and discussed under species 5. richthofeni.) 

 Damese lla WALCOTT, 1905, Proc. U.S.Nat. Mus., vol. xxix,p.34. (Includes the genotype of Stcplmiio- 



care, as a new species under Damesella.) 



The description of this genus was included in that of the type species, 5. rich- 

 thofeni Monke. When studying, in 1905, the Cambrian fossils collected by the 

 Carnegie Institution of Washington Expedition I was unaware of the existence of 

 Herr Monke's paper, and named the type of this genus Damesella chione, stating 

 that the pygidium differed from the pygidium of Damesella blacku'clderi in having 

 its anchylosed segments extending out directly across the border in the falcate 

 spinose ends. A further study of all the material in the collection, and Herr Monke's 

 illustrations, lead me to consider that Stephanocare richthofeni Monke represents 

 a different genus from Damesella bellagranulata, but as yet we do not know the 

 pygidium of that species, or the free cheeks. 



Genotype. Stephanocare richthofeni Monke. 



Two other species are doubtfully referred to Stephanocare, S. ? monkci Walcott 

 and 5. fsinensis (Bergeron). I think that with the discovery of entire specimens it 

 will be found that they belong to quite distinct genera, Stephanocare f monkei may 

 go to Blacku'clderia and 5. ? sinensis prove to be the type of a new genus. 



Stephanocare ? monkei Walcott. 

 Plate 8, Figure 5. 



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



xxiu, pt. i, p. 144, plate 7, figs, i, 10, 2-4. (Describes and illustrates a pygidium.) 

 Stephanocare ? monkei WALCOTT, 1911, Smithsonian Misc. Coll., vol. 57, No. 4, p. 77, plate 14, fig. 7. 



(Described and discussed as a new species essentially as below.) 



Doctor Monke doubtfully refers a cephalon, two pygidia, and a free cheek 

 to Stephanocare. Similar pygidia occur on the platy limestones collected by Mr. 

 Blackwelder, and as they are clearly distinct from any described species I give them 

 the specific name of 5. ? monkei in recognition of the excellent work done by Doctor 

 Monke on this interesting fauna. The generic reference is in doubt, as we have no 

 entire specimens of Stephanocare richthofeni Monke and of this species for comparison. 



Formation and Locality. Middle Cambrian: (C6) Thin, platy limestone in 

 the upper shale member of the Kiu-lung group [Blackwelder, 19070, pp. 37 and 41 



