166 RESEARCH IN CHINA. 



line limestone in the Ch'ang-hia limestone [Blackwelder, 19071;, p. 33, fourth list of 

 fossils], at Ch'au-mi-tien, Shan-tung, China. 

 Collected by Eliot Blackwelder. 



Lisania ? belenus (Walcott). 

 Plate 15, Figure 16. 



Menocephalus belenus WALCOTT, 1905, Proc. U.S.Nat. Mus.,vol. xxix, p. 62. (Species discussed from 

 fragment of the cephalon.) 



This species is represented by a single specimen of a glabella, occipital ring, and 

 frontal rim. It differs from L. bur a [plate 15, fig. 15] in having a very narrow, 

 slightly flattened frontal rim and a very finely pustulose surface. The glabella is 

 also more conical and its front more rounded. A fragment of the fixed cheeks indi- 

 cates that they were rather convex and rose somewhat abruptly from a distinct 

 dorsal furrow. 



Formation and Locality. Middle Cambrian: (C19) Uppermost layers of the 

 Ch'ang-hia limestone [Blackwelder, 190711, p. 33 (part of last list of fossils)], at 

 Ch'ang hia, Shan-tung, China. 



Collected by Li San. 



Lisania bura (Walcott). 



Plate 15, Figures 14, 15. 



Anomocarella ? bura WALCOTT, 1905, Proc. U. S. Nat. Mus., vol. xxix, p. 56. (Species described as 



below.) 

 Anomocarella bura WALCOTT, 1911, Smithsonian Misc. Coll.. vol. 57, No. 4, p. 82, pi. 15, fig. 2. 



(Referred and figured as genotype of new genus Lisania.) 



This species is represented by the central portions of a single cephalon. Gla- 

 bella convex, subquadrilateral, arching very gently from the occipital ring forward, 

 and near the front rather more rapidly downward to the furrow within the frontal 

 rim; without traces of glabellar furrows; occipital furrow narrow, clearly defined; 

 occipital ring rather wide, slightly convex, and projecting a little backward at the 

 center; dorsal furrow shallow, narrow, but clearly defined. 



Fixed cheeks about one-fourth the width of the glabella; palpebral lobe more 

 than one-third the length of the cephalon, with a relatively broad outer rim, out- 

 lined by a very narrow, faintly defined furrow; palpebral ridge short, broad, low, and 

 merging into the palpebral lobe; postero-lateral limb short; frontal rim slightly 

 rounded, separated from the glabella and fixed cheeks by a narrow furrow. 



Surface apparently smooth, but with a few scattered, very fine punctae as seen 

 with a strong lens. 



The type and only specimen of the cephalon has a length of 3 mm. 



Formation and Locality. Middle Cambrian: (C22) Ch'ang-hia limestone, in 

 upper oolite portion [Blackwelder, 19070, pp. 22 and 33 (part of last list of fossils)], 

 at Ch'ang-hia, Shan-tung, China. 



Collected by Eliot Blackwelder. 



A form compared with this species occurs in association with Anomocarella 

 irma Walcott [p. 202], The cranidium does not appear to have the strong palpebral 

 ridge reaching the furrow beside the glabella, as in Lisania bura, but in most char- 

 acters it is quite similar. With only one broken cranidium of each form I do not 

 think it best to identify them as belonging to the one species or to separate them as 

 distinct species. 



