DESCRIPTION OF GENERA AND SPECIES. 103 
Cheeks convex and sloping from the center toward the narrow, sharp dorsal 
furrow about the glabella and to the furrow within the border of the cephalon. A 
very narrow ridge extends just back of the antero-lateral angles of the glabella 
outward so as to disappear in the furrow within the outer border. 
Glabella very narrow in front, gradually widening toward the base, and, from 
the slight indication in the specimen, continued backward in an occipital spine; 
it is marked by two transverse lightly impressed furrows, and what may be a faintly 
impressed occipital furrow. 
This species shows characters that occur in two described forms: the border 
of the head and the occipital spine are much like those of WM. connexus Walcott; 
the transverse furrows of the glabella recall those of some specimens of M. speciosus 
Ford [1873, p. 137, figs. 2a—-b]. Its occurrence in the Cambrian rocks of China 
is most interesting. 
Formation and Locality——Middle Cambrian: (C32) A fine-grained bluish- 
black limestone bowlder believed to have come from the lower part of the Ki-sin- 
ling limestone [Blackwelder, 1907c, p. 272]; collected in river drift 1 mile (1.6 km.) 
south of Chén-p’ing-hién, on the Nan-kiang River, southern Shen-si, China. 
Collected by Bailey Willis and Eliot Blackwelder. 
Genus REDLICHIA Cossmann. 
Hoeferia REDLICH, 1901, Mem. Geol. Survey India, new. ser., vol. 1, p. 2. (Genus characterized and 
discussed. ) 
Not Hoeferia BITTNER, 1895. 
Redlichia CossMANN, 1902, Revue Critique Paléozoologie, Sixiéme Ann., p. 52. (Replaces Hoeferia 
Redlich by Redlichia.) 
Redlichia WAaLcoTT, 1905, Proc. U.S. Nat. Mus., vol. xx1x, p. 24. (Genus described and discussed as 
below.) 
Original description (by Doctor Redlich).—‘‘The cephalic shield is almost 
semicircular, slightly elevated, possesses movable cheeks and two long cheek spines. 
The glabella is cylindrical, slightly contracted toward the middle, provided on 
each side with four lateral furrows. The palpebral lobes, which surround the glabella 
in one continuous curve, are completely separate from it and not confluent as in 
Olenellus. The facial sutures are well developed in all the specimens, and, in con- 
sequence of this, free cheeks are present. 
“The suture begins in the first quarter of the external margin (reckoned from 
the glabella), extends along the eyes, and toward the posterior margin is again 
directed outward. ‘The fixed cheeks are very narrow, whilst the free cheeks, which 
are provided with long cheek-spines, are almost double the width. 
‘Of the thorax only isolated segments are preserved. The axial part is elevated; 
the pleurz are grooved (‘plévres a sillon’ of Barrande), and end in a backwardly 
directed spine. 
“On the glabella the surface of the test shows fine backwardly directed ridges 
which are, however, so fine that they are visible only under the lens. On the 
thickened margin they are also present, but so much stronger that they can easily 
be shown in the figure. The cheeks, even when highly magnified, show nothing 
of the sort, but at most a fine punctation, which, however, is mainly due to the 
structure of the test.” 
Genotype.—Redlichia noetlingi Redlich [1901, p. 3, plate 1]. 
Doctor Redlich compares this form with the genera Protolenus, Paradoxides, 
and Metadoxides, but does not note its close resemblance to Zacanthoides of the 
Middle Cambrian fauna of Nevada. For the purpose of comparison, figures of 
the genera Redlichia, Zacanthoides, and Protolenus are illustrated on plate 24. 
