NO. 5 CAMBRIAN TRILOBITES 3I7 



Acrotreta sagittalis taconica (Walcott) (33, 38a, 39, 430) 



Nisusia festinata (Billings) (.38a) 



Billingsella salemeiisis (Walcott) (2^) 



ArchcEOcyathtis dwighti Walcott (33, 39) 



Protospongia sp. {2,'^a, 43a) 



Platyccras primcEvum Billings (38a) 



Hyolithellus micans (Billings) {33, 380) 



Hyolithellus micans rugosa Walcott (38a) 



Hyolithes americanus Billings (33, 38a) 



Hyolithes communis Billings {33) 



Hyolithes impar Ford {33, 38a, 43a) 



Stenotheca elongata Walcott (33) 



Stenotheca rugosa (Hall) (33) 



Agnostus desideratus Walcott (43a) 



Agnostus sp. (38a) 



Eodiscus connexus Walcott (38a, 4.3a) 



Eo discus speciosus Ford (33, 380, 39, 43a) 



Goniodiscus lobatus (Hall) {33, 38a, 43a) 



Rlliptocephala asaphoides Emmons (33, 38a) 



Ptychoparia cf. adamsi (Billings) {33, 38a, 43a) 



Ptychoparia fitchi Walcott (38a) 



Ptychoparia sp. (38a) 



Zacanthoides eatoni Walcott (33, 38a, 43a) 



Olenoides fordi Walcott (38a) 



Solenopleura tumida Walcott (33) 



Formation and locality. — Lower Cambrian : (43a) Limestone i 

 mile (1.6 km.) east-northeast of Salem, Cambridge quadrangle 

 (Q. S. G. S.) ; (33) limestone on the roadside near Rock Hill 

 Schoolhouse, near North Greenwich, about 5 miles (8 km.) north- 

 northeast of Greenwich, Cambridge quadrangle (U. S. G. S.) ; (38a) 

 limestone 2 miles (3.2 km.) south of North Granville, on the road 

 which turns south from the road running between that village and 

 Truthville, 4 miles (6.4 km.) west-northwest of Granville, Fort Ann 

 quadrangle (U. S. G. S.) ; and (39) limestone south of the Delaware 

 and Pludson Railroad track, on the road running south-southwest 

 from Low Hampton, about 5 miles (8 km.) east-northeast of White- 

 hall, Whitehall quadrangle (U. S. G. S.), all in Washington County, 

 New York. 



CORYNEXOCHUS DELAGEI Miquel 



Plate 55, figs. 3, 3a 



Corynexochus delagei Miquel, 1905, Bull. Soc. geol. France, 4th ser., Vol. 

 5, p. 481, pi. 15, figs. 4, 4a-&. (Describes and illustrates cranidium and 

 pygidium.) 



Original description. — " The roughly triangular head, with a 

 roimded top, in the majority of specimens is more crushed, more 

 2 



