1468 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



TRENTON (RYSEDORPH CONGLOMERATE) OF EASTERN 

 NEW YORK. 



Ampyt (Lonchodomas) hastatus Ruedemann. 

 Aparchites minutissimus robustus Ruedemaiin. 

 Bolboporites amerkanus Billings. 

 Bollia cornucopix Ruedemann. 

 Bythocypris cylindrica (Hall). 

 Calymcne scnaria Conrad. 

 Carinaropsis carinata Hall. 

 Ceraurus pleurcxanthemus (Green). 

 Christiania trentonensis Ruedemann. 

 Clathrospira subconica Hall. 

 Climacograptus scharenbergi Lapworth. 

 Conularia trentonensis HaU. 

 Corynotrypa inflata (Hall) 

 Cyphaspis matutina Ruedemann 

 Cyrtospira attenuate Ruedemann. 

 Dalmanella tcstudinaria var. (Dalman). 

 Dinorthis pcctinclla (Emmons). 

 Diplograptus foliaccus (Murchison). 

 Eccyliopterus spiralis Ruedemann 

 Eurychilina bulbifcra Ruedemann 

 Eurychilina dianthus Ruedemann. 

 Eurychilina obliqua Ruedemann. 

 Eurychilina reticulata Ulrich. 

 Eurychilina? solida Ruedemann. 

 Eurychilina subradiata rcnsselxrica Ruedemann. 

 Gerasaphes ulrkliana (Clarke). 

 Goldius lunatus (Billings). 

 Hallopora multitabulata (Ulrich). 

 Eolopea paludiniformis Hall. 

 Hyolithes rhine Ruedemann. 

 Illxnus americanus Billings. 

 Isochilina armata pygmxa Ruedemann. 

 Isotelus maximus Locke. 

 Leperdilia fabulitcs Conrad. 

 Leperditia rcsplendens Ruedemann. 

 Leptxna rhomboidalis var. (Wilckens). 

 Liospira amcricana (Billings). 

 Liospira subtilistriata (Hall). 

 Lophospira bkincta (Hall). 

 Lophospira perangulata (Hall). 

 Macronolclla fragaria Ruedemann. 

 Macronotella ulrichi Ruedemann. 

 Orthis tricenaria Conrad. 

 Parastrophia hemiplicata Hall. 

 Pholidops trentonensis Hall. 

 Phragmolites comprcssus (Conrad). 

 Pianodema subsequata perveta (Conrad). 

 Platystrophia biforatq, var. Sehlotheim. 

 Plcctambonitcs pisum Ruedemann. 

 Plectambonites scriceus var. (Sowerby). 

 Prasopora simulatrix orientalis Ulrich. 

 Primitia joncsi (Ruedemann). 

 Prolobella aviculoides (Hall). 

 Ptcrygometopus achates (Billings). 

 Pterygomctopus callicephalus Hall. 

 Ptcrygometopus eboraceus Clarke. 

 Rafincsquina alternataf (Emmons). 

 Rafinesquina deltoidea (Conrad). 

 Remopleurides linguatus Ruedemann. 

 Remopleurides tumidus Ruedemann. 

 Schmidtella crassimarginata ventrilabiata Ruede- 

 mann. 

 Sinuitcs canccllata (Hall). 

 Siphonotretat minnesotensis Hall and Clarke. 

 Sphscrocoryphe major Ruedemann. 



Spyroccras bilineatum (Hall). 

 Spyroceras subannulatum (Hall). 

 Streptclasma corniculum Hall. 

 Thalcops ovata Conrad. 

 Tretaspis diademata Ruedemann. 

 Tretaspis rcticulatus Ruedemann. 

 Triplecia nucleus Hall. 

 Trochonema umbilicalum (Hall). 

 Whitclla ventricosa (Hall). 

 Zitteloceras hallianum (D'Orbigny). 

 Zygospira cxigua (Hall). 

 Zygospira rccurvirostris Hall. 



TRENTON (SNAKE HILL) OF EASTERN NEW YORK. 



Archinacella orbiculata (Hall). 



Azygograptus? campanulata Nicholson. 



Calymene scnaria Conrad. 



Carabocrinus radiatus Billings. 



Chaunograptus rectilinea Ruedemann. 



Clathrospira subconica Hall. 



Clidophorus foerstci lUiedemann. 



Clidophorus ventricosus Ruedemann. 



Climacograptus caudatus Lapworth. 



Climacograptus ( Mcsograptus) putillus Hall. 



Climacograptus sharenbergi Lapworth. 



Climacograptus spiniferus Ruedemann. 



Clitamboniics diversus (Shaler). 



Conularia trentonensis multkosta Ruedemann. 



Corynoides calicularis Nicholson. 



Corynoidcs curtus Lapworth. 



Corynoides curtus comma Ruedemann. 



Corynoidcs gracilis Hopkinson. 



Cryptolithus tcsscllatus (Greene). 



Cryptograptus tricornis inscctiformis Ruedemann. 



Ctenobolbina ciliata (Emmons). 



Ctcnobolbina ciliata cornuta Ruedemann. 



Ctenobolhira subrotunda Ruedemann. 



Ctenodonta dcclivis Ruedemann. 



Ctenodonta levata (Hall). 



Ctenodonta prosseri Ruedemann. 



Ctenodonta radiata Ruedemann. 



Ctenodonta recta Ruedemann. 



Ctenodonta subcuncata Ruedemann. 



Cuneamya acutifrons Ulrich. 



Cyclonema cushingi Ruedemann. 



Cyclonema monlrcalcnse Billings. 



Cyclospira bisukata (Emmons). 



Dalmanclla testudinaria (Dalman.) 



Dicranograptus nicholsoni Hopkinson. 



Dinorthis (Plxsiomys) rctrorsa (Salter). 



Diplograptus (Glyptograptus) amplctkaulis Hall. 



Diplograptus amplexkaulis jxrtcnuis Ruedemann. 



Discophyllum peltatum Hall. 



Edrioastcr saratogensis Ruedemann. 



Eoharpes ottawaensis (Billings). 



Eopolychxtus albaniensis Ruedemann. 



Glossograptus (Orthograptus) quadrimucronatus mut. 



pertenuis Hall. 

 Hcterocrinusf gracilis Hall. 

 Isotelus gigas DeKay. 



Lasiograptus ( Thysanograptus) eucharis (Hall). 

 Lepidocoleus jamesi (Hall and Whitfield). 

 Lcptobolus insignis Hall. 

 Lingula curta Conrad. 

 Lophospira uniangulata abbreviata (Hall). 

 Lyrodcsma schuchcrti Ruedemann. 

 Odontopleura trentonensis Hall. 



