533 
PALAEONTOLOGY OF NEW-YORK. 
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Platyceras tenuiliratura... 317 
— tortuosum .472 
_ ? .473 
— tubmforme. 332 
— trilobatum. 316 
— undulostriatum .. 336 
— unguiforme. 322 
— unisulcatum.316 
— ventricosum, 311, 475 
— (Platyostoma) callosum . 478 
Platycrinus parvus. 114 
— plumosus. 113 
— ramulosus .... 115 
— tentaculatus ... 116 
Platyostoma.299 
Platyostoma arenosa.302 
— depressa. 301 
— subangulata ... 301 
— ventricosa, 300, 469 
Pleurotomaria labrosa .... 339 
Proetus protuberans.351 
Protaster. 134 
Protaster forbesi . 134 
Pterygotus. 416*, 424* 
Pterygotus cobbi.417* 
— macrophthalmus, 418* 
— osborni.419* 
Rastrites. 521 
Rastrites barrandi. 521 
Rensselyeria.454 
Rensselseria aequiradiata.. 255 
— cumberlandiae . 464 
— elliptica.256 
— intermedia .... 463 
— lmvis. 256 
— marylandica ... 461 
—■ mutabilis. 254 
— ovalis.458 
— ovoides.456 
— suessana.459 
Reteograptus . 518 
Retcograptus geinitzianus. 518 
Retiolites. 517 
Rhynchonella abrupta.... 228 
— acutiplicata.... 232 
— aequivalvis .... 224 
— altiplicata.231 
— barrandi.442 
— ? bialveata. 233 | 
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Rhynchonella campbellana, 239 
— eminens . 237 
— fitchana.441 
— formosa.236 
— multistriata ... 440 
— mutabilis. 225 
— inutilis. 233 
— nobilis. 240 
— nueleolata.227 
— oblata.439 
— planoconvexa .. 235 
pleiopleura .... 440 
— principalis.443 
— pyramidata.... 229 
— ramsayi .446 
rudis. 235 
— semiplicata .... 224 
— septata. 443 
— speciosa.444 
— sulcoplicata.... 236 
— transversa .... 234 
— vellicata .230 
— ventricosa.238 
Riiynchospira . 213, 483, 484 
Rhynchospira deweyi .... 216 
— formosa .. 215, 485 
— globosa.215 
— rectirostra, 217, 485 
SphvErocystites . 130 
Splnerocystites multifasciatus,130 
Spirifer arenosus. 425 
— arrectus.422 
— concinnus.200 
— cumberlandise.... 421 
— cyclopterus. 199 
— intermedius. 424 
— macropleurus .... 202 
— modestus. 203 
— octocostatus. 205 
■— perlamellosus .... 201 
— pyxidatus.428 
— saffordi.203 
— submucronatus .. 419 
— tenuistriatus .... 204 
— tribulis .420 
— vanuxemi. 198 
Spirorbus laxus ..349 
Strophodonta beckii. 191 
— cavumbona. 187 
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Strophodonta geniculata .. 483 
— headleyana . 185 
— intermedia.482 
— leavenworthana .. 189 
—■ lincklaeni. 415 
— magnilica.... 414, 482 
— magniventra.411 
— planulata. 184 
— punctulifera.188 
— varistriata . 180 
— —• var. arata .... 183 
— vascularia.412 
Strophomena conradi .... 194 
— radiata. 193 
— rugosa. 195 
— var. ventricosa, 417 
— woolworthana ... 192 
Stropiiostylus. 303 
Strophostylus andrewsi .. 472 
— depressus.306 
— elegans. 304 
—• expansus. 470 
— fitchi.306 
— globosus. 305 
— matheri.471 
— obtusus.305 
— rotundatus .... 307 
— transversus.... 470 
Technocrintjs. 139 
Technocrinus andrewsi ... 141 
— sculptus. 143 
— spinulosus .... 140 
— striatus. 142 
Tellinomya nucleiformis .. 263 
Tentaculites elongatus .... 136 
— irregularis .... 137 
Thamnograptus .519 
Thamnograptus capillaris . 520 
— typus.519 
Trematospira .207 
Trematospira camura.212 
— costata. 210 
— multistriata ... 209 
— perforata.208 
— simplex.211 
—• — var .211 
Triplesia. 522 
Triplesia extans. 523 
