Vol. J. Sim — Cambrian Fuuikis of yoiiJi Chiax (iv) 47 



because it has narrow fixed cheelcs, large palpebral lobes, and the antero-lateral extension 

 of the pygidium. The specific name is given in reference to its truncated glabella. 

 Horizon and Locality: — Associated with the preceeding. 

 J/f a.s' urements : — 

 Cranidium 



Length 8.0 mm. 



Width at tlie palpebral lobe 8.2 mm. 



Length of glabella 5.5 mm. 



Anterior width of glabella 3.0 mm. 



Posterior width of glabella 5.0 mm. 



Width of frontal border 2,0 mm. 



Length of palpebral lobe 2.8 mm. 



Width of occipital ring 1.0 mm. 



Width of fixed cheek at the palpebral lobe 2.0 mm. 



Genus CONOKEPHALINA Brogger 

 Conokephalina kaipingensis Sun (sp. nov.) 



Plate III, Fig. 4 a-b. 



This species is represented by several fragmentary central portions of the cephala. 

 Cephalon semicircular, moderately convex. Glabella subrectangular, becoming narrower 

 anteriorly, front margin slightly rounded ; antero-lateral angles also rounded. It is marked 

 by three pairs of the glabellar furrows ; the posterior pair distinct, obliquely extending 

 backward and inward from the dorsal furrow ; the second pair very short and horizontal 

 opposite to the anterior edge of the palpebral lobe, the anterior pair slightly impressed 

 rarely shown in the specimens. Occipital furrow distinct, bending slightly backward ; 

 occipital ring broad in the center, becoming narrow at 1>oth sides and also apparently 

 marked by a node at its center. 



Fixed cheeks very narrow, less than one half the width of the glabella at the 

 palpebral lobe. The facial suture decends with a convex curve to the anterior edge of 

 the palpebral lobe, curves around the latter and finally extends outward to outline the 

 short postero-lateral limb. Palpebral lobe elongate, separated from the fixed cheek by a 

 curving fui-row, and situated opposite the posterior furrows; dorsal furrows rounded and 

 distinctly marked ; palpebral ridge indistinct extending obliquely from the anterior part 

 of the palpebral lobe near to the frontal margin of the glabella. Frontal limb narrow and 



