164 RESEARCH IN CHINA. 



(,'ciwtypcAnotHocarella (?) buraWalcott [19056, p. 56, and 191 1, plate 15, fig. 2]. 



This genus is founded to receive four species that do not appear to fall within 

 any described genus. From Pagodia [plate 15] it differs in having a longer eye-lobe, 

 narrower free cheeks, and flatter frontal margin. Pagodia occurs with the Upper 

 Cambrian fauna, Lisania with the Middle Cambrian fauna. From Chuangia [plates 

 1 6, 17] it differs in its narrower frontal border, narrower fixed cheeks, and quite 

 unlike associated pygidium. The three genera, Lisania, Pagodia, and Chuangia, 

 all have a strong, nearly smooth glabella and a narrow frontal margin and do not 

 appear to come within the limits of Agraulos, Anomocare, Ptychoparia, Coosia, or 

 Soleno pleura. 



The species referred to the genus are all small and unfortunately only repre- 

 sented by cranidia and associated free cheeks and pygidia. It may be that when 

 entire specimens of the dorsal shield are found other marked differences will appear 

 between the three genera, Lisania, Pagodia, and Chuangia. 



The generic name is taken from Li San, the Chinese assistant of both Dr. Bailey 

 Willis and Dr. Joseph P. Iddings. 



The species referred to the genus Lisania are: 



L. agonius (Walcott), Kiu-lung group, Middle Cambrian. 



L. ajax (Walcott), Kiu-lung group, Middle Cambrian. 



L. alala (Walcott), Ch'ang-hia limestone, Middle Cambrian. 



L. ? bclenus (Walcott), Ch'ang-hia limestone, Middle Cambrian. 



L. bura (Walcott), Ch'ang-hia limestone, Middle Cambrian. 



L. cf. bura (Walcott), Ch'ang-hia limestone, Middle Cambrian. 



Lisania agonius (Walcott). 

 Plate 15, Figures 17, \-ja. 



A rionellus agonius WALCOTT, 1905, Proc. U. S. Nat. Mus., vol. xxix, p. 58. (Species described essen- 

 tially as below.) 



Central portion of the cephalon, exclusive of the free cheeks, irregularly sub- 

 quadrilateral, convex. Glabella moderately convex, narrowing slightly toward the 

 front; length and width at the base nearly the same; by reflected light traces of 

 two pairs of glabellar furrows may be seen; occipital furrow narrow and shallow; 

 occipital ring narrow at the sides, becoming stronger toward the center, which rises 

 to form the base of a short, strong, backward-sloping spine; dorsal furrow narrow 

 and clearly defined. 



Fixed cheeks narrow and nearly flat at the palpebral lobes ; they slope rapidly 

 in front toward the frontal margin, and backward toward the postero-lateral limb; 

 palpebral lobes narrow, about one-third the length of the cephalon; frontal limb 

 narrow directly in front of the glabella and rounding over to the rounded frontal rim. 



Surface smooth under a strong lens. 



The type specimen of the cephalon has a length of 4 mm., with a slightly 

 greater width at the palpebral lobes. 



This species differs from Lisania alala [p. 165] in having a thickened rounded 

 frontal rim and a proportionately wider glabella. From Lisania ajax [p. 165] it 

 differs in being broader and in the presence of an occipital spine. 



Formation and Locality. Middle Cambrian : (( ' 1 and f 2) Lower shale member 

 of the Kiu-lung group [Blackwelder, 19070, 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. 



