NO. 9 NEW YORK POTSDAM-HOYT FAUNA 269 



Genus CONOCEPHALINA Brogger 

 CONOCEPHALINA WHITEHALLENSIS, new species 



Plate 44, figs, g-iia. 



Although fragments of this species are abundant they are so 

 broken and abraded that only imperfect specimens of the cranidium, 

 free cheeks, and associated pygidia have been seen. 



The elongate-subquadrangular glabella, narrow free cheeks, and 

 long palpebral lobes of the cranidium relate this species to Cono- 

 cephalina ornata Brogger, the type of the genus. The free cheek 

 probably had a short, sharp genal spine. The cranidium illustrated 

 has a length of 7.5 mm. 



Formation and locality. — Upper Cambrian: (iioa) Potsdam 

 sandstone formation, in sandstone a little above and east of the canal 

 road north end of town of Whitehall, Washington County, New York. 



Genus PAGODIA Walcott 



Pagodia Walcott, 1905, Proc. U. S. Nat. Mus., Vol. 29, p. 63. 

 PAGODIA SEELYI, new species 



Plate 44, figs. 12-143. 



This very neat species is fairly abundant at one locality of the Pots- 

 dam sandstone near Port Henry. It is represented by casts of the 

 cranidium and pygidium and is much like Pagodia dolon Walcott^ 

 from the Upper Cambrian of China. Somewhat similar forms occur 

 in the lower portion of the Pogonip limestone of Nevada.^ 



One of the largest cranidia in the collection has a length of 7 mm. 



Formation and locality. — Upper Cambrian: (136a) Potsdam 

 sandstone, on a large brook at a point on the Mineville Railroad at 

 the turning of the first Y near Port Henry, Essex County, New York. 



AGRAULOS SARATOGENSIS Walcott 



Plate 43. figs. ii-i5a. 



Bathyurus annatus (Billings), Walcott, 1879, Thirty-second Ann. Kept. 



New York State Museum, p. 131. (Provisionally identified as B. 



armatus.) 

 Ptychoparia (A.) saratogensis Walcott, 1886, Bull. U. S. Geol. Surv., No. 30, 



p. 21. (Name used in list.) 

 Ptychoparia saratogensis (Walcott), Dwight, 1887, Trans. Vassar Bros. 



Inst., Vol. 4, pp. 207-208. (Species mentioned in text.) 



^ Proc. U. S. National Museum, Vol. 29, 1905, p. 66. 

 " Monogr. U. S. Geol. Survey, Vol. 8, 1884, pi. 12, fig. 5. 



