I5I15LIOGKA1MIY OF !'AL.E()/OIC CRUSTACEA. Q.f 



Helderberg, Hamilton, Portage, Chemung, and Catskill 

 groups. Albany, 1888, 236 pp., 36 pis. 



Trilobita: DalmaniteH siibgen. Hausmanni ii. s. g. Coronura n. s. g 

 Mesothyra u. g. Rhinocaris n. g. Schizodiscus u. g. Strobilepsis n. g 

 Calymene platys Greeu. Homalovoiua major Whitfield, H. dekayi Green 

 Bronteus tuUius Hall. Pharops cristata Hall, also var. pipa Hall, P. rana 

 Green, P. biifo Greeu, P. cacapona Hall, /*. nupera Hall. Dalmanite-i 

 (Hausmania) pleiiroptyx Green, D. ( H.) concinnus Hall. 



Dalmanites ( Hausmania) concinnus ■var. serrula Hall, D. ( H . ) phacoptyx 

 Hall, D. (H.) meeki Walcott, D. (Coronura) aspectans Conrad, D. (C.) 

 myrmecophorus Green, I). ( C . ) emarginatus Hall, D. (Cryphceus) comis Hall, 

 D. (C.) pleiona Hall, D, (C.) booth! Green also var. callitelus Green, D. (C.) 

 Aarrisj Hall, D. (Odontocephalus) selennruH Conrad, Z>. (0.) bijidus Hall, 

 D. (0.) tegeria Hall, D. (0.) coronatus Hall, D. (Corycephalus) regalia 

 Hall, D. (C.) pygmaciis Hall, D. (Chamops) anchiops Green also var. ar- 

 matus Hall, D. (C.) anchiops var. sobrinus Hall, D. (C.) calypso Hall, D. 

 (C.) e.rina Hall, D. (C.) macrops Hall. Acidaspis calUcera Hall, A. sp., 

 A. romingeri Hall. Lichas ( Terataspis) grandis Hall, L. (C.) hispidus Hall, 

 L. (C.) eriopis K&\\, L. (C.) hylaeus Hall, L. (Arges) contusus Hall, L. 

 (Ceratolichas) gryps'S.&W, L. (C.) dracon H.a\]. Proetus co7iradi Hall, P. 

 anguslifrons Hall, P. hesione Hall, P. curvimarginatus Hall, P. latimar- 

 ginatus Hall, P. cassimarginatus Hall, P. folliceps'K&W, P. clarits Hall, P. 

 canaliculalus Hall, P. verneuili Hall, P. microgemma Hall, P. stenopyge 

 Hall, P. ovifrons Hall, P. delphinulus Hall, PJ j)lanimarginatus Meek, P. 

 tumidus Hall, P. haldemani Hall, P. macrocephalus Hall, P. rowi Green, 

 P. jejujivs Hall, P. /)AocJon Billings, P . prouti ^hnmard, P.nevadce Hall, 

 P. occidens Hall, P. ? longicaudus. Phaethonides arenicolus Hall, P. varicellus 

 Hall, P. gemmoius Hall, PJ denticulatusMeek. C'yphaspis minuscula Hall, 

 C. stephanophora Hall, C diadeina, C . hybrida Hall, C. ornata Hall also 

 var. baccata Hall, C. craspedota Hall, C. kevis Hall. 



Xiphosura: ProtoUmulus eriensis Williams. Earypterus beecheri Hall. 

 Stylonurus excelsior Hall, S.'l (Echinocaris?) wrightianus Dawson. 



Phyllocardia: Ceratiocaris longicauda Hall, C. beecheri Clarke, C. ? sim- 

 plex Clarke. Echinocaris punctata Hall, E. lohitfieldi Clarke, E. condylepis 

 Hall, E. socialis Beecher, E. sublcevis Whitfield, E. jiustulosa Whitfield, E. 

 m«i</7iOfZosa Whitfield. Elymocaris capsella'H.siW, E.siliqualBeecher. Tropi- 

 docaris hamiltonensis Hall, T. bicarinata Beecher, 7'. interrupta Beecher. 



PinacaridsB : Mesothyra oceani Hall, M. neptuni ^aW, M. sptimeea Hall. 

 Dithyrocaris veneris, D. belli Woodwai'd. 



RhiuocaridiW: Rhinocaris columbina Glance, R. scaphoptera Clarke. 



Discinocaridre: Spathiocaris emersoni Clarke. Dipterocaris pennat-dcedali 

 Clarke, D. procne Clarke, D. pes-cervce Clarke. 



Decapoda: Palceopalamon newberryi Whitf. 



Phyllopoda: Esthcria pulex Clarke. Schizodiscus capsa Clarke .• 



