PART I - CHAZYAN AND RELATED BRACHIOPODS—COOPER 35 
strongly of the Quebec City limestone which has Edinburg and possibly Young- 
man elements in it. 
Another group of pebbles are composed of compact reddish-gray limestone 
and contain the following brachiopods: 
Dalmanella testudinaria (Dalman) 
Protozyga exigua Hall = Cyclospira ? longa Cooper 
Rafinesquina alternata (Conrad) 
Triplecia nucleus Hall 
These are undoubtedly of Trenton age problably younger than the preceding. 
A final group of pebbles are of gray crystalline limestone and are the com- 
monest in the conglomerate. They abound in Rafinesquina and Sowerbyella. 
These contain also: 
Dalmanella testudinaria (Dalman) 
Dinorthis pectinella (Emmons) 
Leptaena rhomboidalis (Wilckens) = L. ordovicica Cooper 
Orthis tricenaria Conrad = Hesperorthis tricenaria (Conrad) 
Parastrophia hemiplicata Hall = Parastrophina hemiplicata (Hall) 
Plectambonites ruedemanni Raymond 
P. piswm Ruedemann = Bilobia piswum (Ruedemann) 
Plectorthis plicatella Hall 
Protozyga exigua (Hall) 
Rafinesquina alternata (Conrad) 
R. deltoidea (Conrad) 
Triplecia nucleus Hall 
Zygospira recurvirostris (Hall) 
Ruedemann dates this fauna as early Trenton. The presence of Parastrophina 
suggests Hull, and this is thus the youngest fauna in the conglomerate. 
VICINITY OF POUGHKEEPSIE, N, Y. 
Ordovician limestone appears in two northeast-southwest belts in the Pough- 
keepsie Quadrangle ; the westernmost one is the Wappinger belt and the eastern- 
most one is the Fishkill belt. Fair fossils have been produced from the Wap- 
pinger belt in the vicinity of Pleasant Valley and Rochdale, Poughkeepsie (15’) 
Quadrangle. The Wappinger Creek belt is the only one mentioned here because 
fossils from the two localities mentioned above are recorded. At the railroad cut 
at Pleasant Valley Tetradium cellulosum is recorded from dove limestone 
(Knopf, 1927, p. 439). These are dated as Lowville, but it is conceivable that 
they actually belong to the Trenton. The dove beds are overlain by 65 feet of 
gray shale according to Knopf. The shales are followed by fine-grained, dark- 
gray, bluish-weathering limestone containing fossils. Another locality for fossils 
is on Wappinger Creek at Rochdale about 24 miles southwest of Pleasant Valley. 
Brachiopods recorded from these two places are: 
Dalmanella testudinaria = Paucicrura ? 
Idiospira ? warthini Cooper 
Lingula sp. 
Nicolella angulata Cooper 
