DESCRIPTION OF GENERA AND SPECIES. 191 



The surface is marked by a few minute, scattered pores to be seen only with a 

 strong lens. The largest cephalon 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 by shallow furrows, and a terminal segment ; the furrows in 

 the axis are extended out on the pleural lobes, disappearing on the planulate margin. 

 The central portions of the cephalon of this species differ from Anomocarella 

 temenns [plate 20, fig. 7], 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. 



Formation and Locality. Middle Cambrian : (C 72) Thin green-gray limestone 

 interbedded with ocherous and green clay shales, overlying the massive oolite in the 

 Ki-chou formation [Willis and Blackwelder, 1907, pp. 139 and 145 (third list of 

 fossils)], 4 miles (6.4 km.), east of Fang-lan-chon, Shan-si, China. 



Collected by Eliot Blackwelder. 



Anomocare latelimbatum Dames. 



Plate 1 8, Figures 2, 20 e. 



Anomocare latelimbatum DAMES, 1883, China, Richthofen, vol. iv, p. 14, plate 2, figs. 9, 10, 13. 

 (Species described, discussed, and illustrated.) 



This species is represented in our collections from Shan-tung by two specimens 

 of the cranidium, one of which is well preserved and is illustrated byfigures 2&and 2d. 

 It is identified by comparison with photographs of the type specimens described by 

 Doctor Dames. The second specimen preserves the glabella, fixed cheeks, and pal- 

 pebral lobes and a portion of the frontal limb. 



Doctor Dames states that the type specimens are associated with Agnostus 

 chinensis Dames, Concephalites frequens Dames, and Lingulclla 2 spp. in a dense 

 greenish-gray limestone at Sai-ma-ki, Province of Liau-tung, southeast of Mukden, 

 Manchuria, China. 



Portions of the dorsal shield are abundant in the dark gray limestones in L,iau- 

 tung, Manchuria. Several of these are illustrated. 



Formation and Locality. Middle Cambrian: (C52) In the lower part of the 

 lower limestone member of the Kiu-lung group [Blackwelder, 19070, pp. 37 and 39 

 (second list of fossils), and fig. 7 (bed 22), p. 27], near base of cliffs in mountain 

 1,000 feet (305 m.) high, 3 miles (4.8 km.) northeast of Sin-t'ai-hien, Shan-tung; 

 also (02), lower shale member of the Kiu-lung group [idem, pp. 37 and 40 (part of 

 the third list of fossils), and fig. 10 (beds 4 and 5), p. 38], 2 miles (3.2 km.) south of 

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



Collected by Eliot Blackwelder. 



Anomocare lisani Walcott. 

 Plate 1 8, Figures 4, 40-?. 



Anomocare lisani WALCOTT, 1911, Smithsonian Misc. Coll., vol. 57, No. 4, pp. 90-91, plate 15, figs. 

 9, 90-6. (Described and discussed as a new species essentially as below.) 



This fine species is represented by numerous specimens of fragments of the 

 cephalon, segments of the thorax, and entire pygidia. They are all compressed in a 

 fine argillaceous shale and usually only a faint impression remains. The cranidium 

 is not unlike that of Coosia (?) limbata (Angelin) [plate 2 1 , fig. 12]; it differs in having 

 a slightly convex or rounded frontal limb and proportionately narrower glabella. 



