NEW YORK STATE MUSEUM 



Pocta, Phil., cited, 72, 114 

 Pollicipes siluricus, 62, 64, 122 

 Pontobdellopsis cometa, 30, 32, 61 

 Prasopora sp., 16, 25, 26, 35 



lycoperdon, 10 



See also Monticulipora (Praso- 

 pora) lycoperdon 



simulatrix, 24, 26, 29 

 Primitia, 23, 25, 42, 49 



JA, 48 



unicornis, 64 

 Primitiella unicornis, 22, 23. 24, 25, 



28, 120, 121 

 Proetus hudsonicus, 119 



latimarginatus, 119 



matutinus, 118 



parviusculus, 117, 118, 119, 120 



undulostriatus, 60, 62, 64, 65, 117- 



19 



Prolobella? trentonensis, 23, 97-98 

 See also Pterinea (Prolobella?) 

 trentonensis 



Prosser, C. S., cited, 71, 72, 10, 15, 

 20, 21, 42, 47, 53 



Protowarthia cf. cancellata, 62 



Protozyga exigua, see Atrypa 

 (Protozyga) exigua 



Pterinea (Prolobella) insueta, 23, 



27, 28, 64 



(Prolobella?) trentonensis, 21, 27, 



28, 48, 64 



Pterotheca cf. canaliculata, 60, 62 

 Pterygometopus callicephalus, 22, 62 



See also Dalmanites 

 Pterygotus, 46 



sp., 46 



nasutus, 42, 45, 49 



prolificus, 42, 45, 46 

 Pulaski shale, 7, 8, n, 37 



Rafinesquina, 34, 48 



alternata, 16, 20, 21, 22, 23, 24, 41, 

 60, 61 



ulrichi, 49, 51 

 Raphistoma lenticulare, 21 

 Rexford Flats, 32, 38, 41 

 Rhinidictya canadensis, 21 



cf. parallela, 51 



Rhynchotrema inaequivalve, 35, 36, 

 61 



increbescens, 22 



Rhytimya, sp., 44 

 Rondout waterlime, 57 

 Rotterdam Junction, 42 

 Rotterdam section, 43 

 Rowe, R. B., cited, 71, 53 

 Ruedemann, Rudolf, cited, 71, 72, 10, 



11, 12, 49, 57, 59 

 Rysedorph Hill conglomerate, 69 



Saffordia ulrichi, 42, 49, 50, 107-8 



ventralis, 108 

 Sagenella ambigua, 91 

 Salmon River shale, n 

 Sandstone beds, 40 

 Saratoga, 31, 32 



Saratoga county, black shales, 34 

 Saratoga lake, 58 

 Saratoga quadrangle, 59 

 Scalpellum, 122 

 Schenectady county, 5, 15 

 Schenectady formation, 6, 29, 37-50, 



57, 69; first use of term, 38; 



summary of conclusions, 66; 



thickness, 38, 39 

 Schizambon? fissus var. canadensis, 



30, 63 

 Schizocrania filosa, 23, 26, 27, 28, 33, 



60, 61 



Schizocrinus nodosus, 61 

 Schoharie, 55 

 Schoharie creek, 46, 57 

 Schoharie Junction, 45 

 Schuchert, Charles, cited, 71, 72, 73, 



11, 14, 28, 56, 94, 95. 123 

 Schuylerville quadrangle, 59 

 Scofield, W. H., cited, 71, 109 

 Serpulites, 41, 49 



longissimus, 36 

 Sharon Springs, 57 

 Snake Hill beds, 6, 34, 39, 58-65; 



first use of term, 59; summary of 



conclusions, 67 

 Snook kill, 32, 34 



Solenomya ? insperata, 60, 62, 105-6 

 Spatiopora sp., 23, 24, 90-91 

 Sphenophycus, 73-75 



latifolius, 41, 42, 44, 45, 46, 47, 48, 

 52, 54, 74, 75 



whitei, 75 



