138 RESEARCH IN CHINA. 
This genus, as pointed out by Broégger, occupies an intermediate position between 
forms referred to Dikelocephalus and Ptychoparia (Conocephalites as used by 
Broégger). He refers to Conokephalina, Dikelocephalus osceola Hall, D. misa Hall, and 
D. spiniger Hall. I now refer D. misa to Conokephalina, but D. osceola and D. 
spiniger will be placed under genera that will soon be described and illustrated in 
connection with a paper on the genus Dikelocephalus and allied genera. 
Conocephalites emmrichi Barrande appears to belong to this genus and as entire 
specimens of the dorsal shield are known it is illustrated on plate 13, figures 7, 7a. 
Among the fragmentary forms from China, six appear to come within the limits 
of the genus, as far as may be determined by having only the cranidium for 
comparison. 
Conokephalina is characterized by its elongate palpebral lobes, narrow free 
cheeks, and elongate glabella narrowing more or less slightly toward the broadly 
rounded front. 
The Chinese species referred to it are: C. belus (Walcott), C. ? dryope (Wal- 
cott), C. maia (Walcott), C. vesta (Walcott), and C. sp. undt. (Walcott). 
Conokephalina belus (Walcott). 
Plate 13, Figures 12, 12a. 
Solenopleura belus WALCOTT, 1905, Proc. U. S. Nat. Mus., vol. xxrx, p. 90. (Described as a new 
species essentially as below.) 
This species is represented by a fragment of the cephalon that includes the 
glabella and fixed cheeks. The glabella is moderately convex and narrows slightly 
toward the rather broadly rounded front; the surface is marked by a pair of short, 
oblique posterior furrows and one anterior pair at about the anterior third; occipital 
furrow narrow, distinct, arching forward at the center, and considerably deeper 
toward the end; occipital ring clearly defined; of moderate width, and slightly con- 
vex; dorsal furrow narrow and clearly defined. 
Fixed cheeks narrow, scarcely more than a ridge between the dorsal furrow and 
the palpebral lobe; posteriorly they slope downward to a long postero-lateral limb, 
and anteriorly drop rather rapidly to the frontal limb; palpebral lobe a little more 
than one-third the length of the glabella in front, deeply grooved along its center 
by a furrow parallel to the elevated posterior margin; frontal limb short and slightly 
convex in front of the glabella; it passes into a shallow furrow within a slightly 
rounded frontal rim; the latter is broken away except at the ends. 
Surface marked by numerous, scattered, rather small pustules. 
Length of cephalon, 6 mm., with a width at the palpebral lobes of 5 mm. 
This species at first suggests Solenopleura agno |p. 167], but differs from that 
and other species from China in its very narrow fixed cheeks and relatively large 
palpebral lobes. 
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, 19074, p. 42 
(part of last list of fossils)], 1 mile (1.6 km.) west of T'si-nan, Shan-tung, China. 
Collected by Eliot Blackwelder and Li San: 
Conokephalina dryope (Walcott). 
Plate 13, Figures 11, 11a—0. 
Ptychoparia dryope Watcort, 1905, Proc. U. S. Nat. Mus., vol. xxix, p. 78. (Species discussed 
essentially as below.) 
The cephalon representing this species is somewhat of the same type as that 
of Inouyia titiana [plate 14, fig. 9] from the base of the Ch’ang-hia limestone. 
