DESCRIPTION OF GENERA AND SPECIES. 163 
bella; the glabella of P. bia has a length of 6 mm. with a width at the center of 
3mm., while P. lotos, witha length of 5 mm., has a width at the center of nearly 4 mm. 
Formation and Locality.—Upper Cambrian: (C56) Lower part of Ch’au-mi-tién 
limestone, 25 feet (7.5 m.) below the top of Pagoda Hill [Blackwelder, 1907a, p. 42 
(part of last list of fossils)], 1 mile (1.6 km.) west of Tsi-nan, Shan-tung, China. 
Collected by Eliot Blackwelder and Li San. 
Pagodia macedo Walcott. 
Plate 15, Figure 13. 
Pagodia macedo WaLcort, 1905, Proc. U. S. Nat. Mus., vol. xxrx, p. 66. (Described as a new species. ) 
This species is represented by a single specimen of the cephalon, exclusive of the 
free cheeks. Glabella elongate, subquadrangular, narrowing very slightly toward 
the broadly rounded, nearly transverse front, as indicated by the cast of the interior 
of the crust; surface marked by two pairs of shallow furrows that penetrate a short 
distance on each side and separate the glabella into three subequal lobes; occipital 
furrow rounded and strong; occipital ring unknown; dorsal furrow strong, rounded, 
and clearly separating the moderately convex glabella from the sloping fixed cheeks. 
Fixed cheeks slightly convex, sloping gently from the dorsal furrow to the 
palpebral lobe, more rapidly to the furrow within the posterior margin, and anteri- 
orly to the front margin; palpebral lobes situated about midway between the front 
and the posterior margins of the cephalon, small and short, not much over one-fifth 
the length of the cephalon; frontal rim narrow, wire-like, and separated from the 
glabella and fixed cheeks by a rounded furrow of moderate depth. 
The crust is rather thick, the outer surface marked by scattered, shallow puncte, 
with very fine puncte, as shown by a strong lens, between them. 
Length of cephalon, exclusive of occipital ring, 7.5 mm. 
This species is closely related to Pagodia lotos [p. 163]. It differs in the form 
of the frontal rim and the more uniform slope of the glabella toward the front. 
From P. bia [p. 161] it differs in the more rapid downward slope of the front of the 
glabella and in the parallel or slightly contracting sides of the glabella. 
Formation and Locality.—Upper Cambrian: (034) Purplish-gray limestone about 
100 feet (30 m.) above the base of the Ch’au-mi-tién formation [Blackwelder, 19072, 
p. 36 (part of first list of fossils)], in road at northeastern corner of small village near 
Ch’au-mi-tién, Shan-tung, China. 
Collected by Eliot Blackwelder. 
Genus LISANIA Walcott. 
Lisania WALCOTT, 1911, Smithsonian Misc. Coll., vol. 57, No. 4, pp.82-83. (Described and discussed 
as a new genus essentially as below.) 
Cranidium subquadrate in outline, exclusive of postero-lateral limbs. Glabella 
with slightly converging sides, broadly rounded in front and curving gently down 
to a narrow furrow separating it from the frontal border, without distinctly marked 
glabellar furrows; occipital furrow distinct; occipital segment strong. Fixed cheeks 
narrow; palpebral lobe above the eye nearly one-third the length of the cephalon; 
palpebral ridge usually defined to the edge of the dorsal furrow beside the glabella. 
Frontal border slightly convex and separated from the fixed cheeks and glabella by 
a narrow, shallow, but distinct furrow. 
The associated free cheeks have a strong genal spine, and associated pygidia 
a strong central axis marked by three or four transverse rings and a terminal section. 
Surface smooth or slightly roughened by very fine shallow pits. 
