NO. 4 CAMBRIAN FAUNAS OF CHINA 83 



cheeks, and quite unlike associated pygidium. The three genera, 

 Lisaiiia, Pagodia, and CJiuangia, all have a strong, nearly smooth 

 glahella and a narrow frontal margin and do not appear to come 

 within the limits of Agranlos, Anouiocare, Ptychoparia, Coosia, or 

 Solcnoplcitra. 



The species referred to the genus are all small and unfortunately 

 only represented by cranidia and associated free cheeks and pygidia. 

 It may be that when entire specimens of the dorsal shield are found 

 other marked dilYerences will appear between the three genera, 

 Lisaiiia, 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. agoiiiiis (Walcott), Kiu-lung group, Middle Cambrian. 



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



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



L. ? belenus (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. 



SOLENOPLEURA CHALCON, new species 



Plate 16, iig. 5 



Only one specimen of the cranidium of this species is known. In 

 form it is nearest to SoJcnoplcura bcvoc Walcott. It differs in 

 having a proportionately narrower glabella, more convex free cheeks, 

 more rounded frontal rim, and in the presence of a depression 

 dividing the frontal limb on the median line of the glabella. Its 

 tuberculated surface is much like that of 6". hcroc. 



Formation and locality. — Middle Cambrian: (35r) Fu-chou series; 

 limestones near the base just above the white quartzite, 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 CHUANGIA, new genus 

 This genus is proposed for a group of Upper Cambrian trilobites 

 in which the cephalon has a truncato-conical or subquadrangular 

 glabella ; a narrow, concave frontal limb ; and, so far as known, a 

 smooth test. 



