DESCRIPTION OF GENERA AND SPECIES. l6l 



lens, between the larger punctae. The species now referred to the genus are Pagodia 

 bia Walcott, P. dolou Walcott, P. lotos Walcott, and P. maccdo Walcott. I was at 

 first inclined to refer these forms to Dolichometopus, but they differ from the type of 

 the latter, Dolichometopus svccicus Angelin [(1854) 1878, p. 73, plate 37, fig. 9], in the 

 narrowing instead of widening of the glabella in front, in the presence of small 

 instead of large eye-lobes, short instead of long postero-lateral limbs, and obscure 

 glabellar furrows. 



Pagodia bia Walcott. 



Plate 15, Figures 10, 100. 



Pagodia bia WALCOTT, 1905, Proc. U. S. Nat. Mus., vol. xxix, p. 65. (Described as a new species 

 essentially as below.) 



Cephalon, exclusive of free cheeks, subrhomboidal, moderately convex. Gla- 

 bella slightly convex, subquadrilateral in outline, slightly narrowed along the cen- 

 tral portions, and marked by two pairs of short glabellar furrows on the posterior 

 half and a very slight depression indicating a furrow on each side well toward the 

 front; occipital furrow narrow, very clearly defined, and arching slightly forward 

 toward the center; occipital ring narrow and rounded; dorsal furrow shallow but 

 distinct. 



Fixed cheeks about half as wide as the glabella and sloping gently downward 

 from the dorsal furrow ; palpebral lobes small, situated about midway between the 

 front and back margins of the cephalon; no traces of palpebral ridges have been 

 observed ; postero-lateral limb short, strong, and marked by a rounded furrow within 

 the posterior margin; frontal rim very narrow, rounded, and separated from the gla- 

 bella and fixed cheeks by a narrow, deep furrow. 



Surface marked by a few shallow, scattered puncta?, and under a very strong 

 lens it appears to be minutely punctate. 



The largest specimen of the cephalon in the collection has a length of 8 mm. 



The form of the glabella of this species is not unlike that of Pagodia macedo 

 [p. 163], but its anterior lobe is much broader. 



Formation and Locality.- Upper Cambrian: (056) Lower part of Ch'au-mi-tien 

 limestone, 25 feet (7.5 m.) below the top of Pagoda Hill [Blackwelder, 19070, p. 42 

 (part of last list of fossils)], i mile (1.6 km.) west of Tsi-nan, Shan-tung, China. 



Collected by Eliot Blackwelder and Li San. 



Pagodia dolon Walcott. 



Plate 15, Figure n. 



Pagodia dolon WALCOTT, 1905, Proc. U. S. Nat. Mus., vol. xxix, p. 66. (Described as a new species 

 essentially as below.) 



This species is represented by two specimens of the cephalon, exclusive of 

 the free cheeks. Glabella elongate, subquadrilateral, moderately convex; a very 

 obscure trace of a posterior pair of short furrows is all that can be seen on the outer 

 surface; occipital furrow rather narrow, clearly impressed, and arching slightly for- 

 ward at the center; occipital ring narrow at the sides, increasing gradually in width 

 to the center, where it is strong and moderately convex ; dorsal furrow strong at the 

 sides and front of the glabella. 



Fixed cheeks a little more than one-half the width of the glabella, convex, and 

 sloping outward and downward from the dorsal furrow ; back of the palpebral lobes 

 they slope gently to the furrow within the posterior margin, and anteriorly more 

 rapidly to the furrow within the frontal rim; palpebral lobes small, about one-fourth 

 the length of the cephalon; postero-lateral limb short, and marked by a strong, 



