164 RESEARCH IN CHINA. 
Genotype.—A nomocarella (?) bura Walcott [1905), p. 56, and 1911, 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 
16, 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 
Solenopleura. 
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 Lisanza are: 
. agonius (Walcott), Kiu-lung group, Middle Cambrian. 
. ajax (Walcott), Kiu-lung group, Middle Cambrian. 
. alala (Walcott), Ch’ang-hia limestone, Middle Cambrian. 
. 2? belenus (Walcott), Ch’ang-hia limestone, Middle Cambrian. 
. bura (Walcott), Ch’ang-hia limestone, Middle Cambrian. 
. cf. bura (Walcott), Ch’ang-hia limestone, Middle Cambrian. 
Sl all lal le 
Lisania agonius (Walcott). 
Plate 15, Figures 17, 17a. 
Arionellus 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: (C1 and C2) Lower shale member 
of the Kiu-lung group [Blackwelder, 1907a, pp. 37 and 4o (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. 
