PALEOZOIC TIME — CAKBONIC. 691 



City, Mo. ; M. clubium, Kan. ; M. Walcotti, Tex. ; M. Hayi, Kan. ; M. inconspiciium, 

 Kan. ; Tainoceras cavatum, Tex. ; Domatoceras umbilicatum, Kan. ; Asymptoceras New- 

 toni, Kan. ; A. capax (Cryptoceras capax, Meek and Worthen), Mo. ; Phacoceras Dumbli, 

 Tex. ; Bphippioceras divisum (Nautilus clioisus of White and St. John) ; Endolobus gib- 

 bosus, Tex. They are mostly large species, 4 to 6 inches in diameter. 



7. Worms. — Fig. 1086, Spirorbis carbonarius Dn. ; also, S. arietinus Dn. 



8. Limuloids. — Fig. 1088, Prestioichia DancB — Euproops Danoe of M. & W., Morris, 

 111.; P. lo7igispina Packard, Pittston, Pa.; Dipeltis diplodiscus Packard, Mazon Creek, 

 111.; Cyclus Americanus Tack?iYd, Mazon Creek, 111. (Mem. JVat. Acad. Sc, iii., 14, 1888). 



9. Crustaceans. — (a) Trilobites. — Phillipsia Missourie7isis, P. major, P. Gliftonensis 

 of Shumard, from the Upper Coal of Missouri ; P. (Griffithides) scitula M. «& W. , 111., Ind., 

 and Neb. ; P. (Griff.) Sangamonensis M. «& W., Upper Coal, 111. 



(b) Entomostracans. — Cythere Americana Shum. , XJ^pper C, Mo.; Leaia tricarinata 

 M. & W., Upper Coal-measures, 111.; Dithyrocaris carbonaria M. & W., 111.; Ceratiocaris 

 sinuata M. & W., 111. 



(c) Decapods. — Fig. 1089, Acanthotelson Stimpsoni M. & W., Morris, 111.; A. Eveni 

 M. & W., Morris, 111.; 1090, Palaiocaris typus M. & W., Morris, 111.; 1091, Anthraco- 

 palcemon gracilis M. & W., Morris, 111.; A. Hillanus Dn., N. Scotia. 



10. Myriapods. — Mazon Creek, 111., has afforded species of a dozen genera, including 

 PalcBOcampa anthrax M. & W., Acantherpestes major M. & W., Euphoberia armigera 

 M. & "W., and 10 other species of the genus ; Anthracerpes typus M. & W., Eileticus anthra- 

 cinus Scudder, Xylobius Mazonus Sc, Trichiulus villosus Sc, and others of Archiulus, 

 Ilyodes, etc. In Nova Scotia have been found Xylobius sigillarice Dn. (Fig. 1092), X. 

 fractus Sc, X. similis Sc, Archiulus Dawsoni Sc, A. Lyelli Sc, A. euphoberioides, and 

 others. 



11. Arachnids. — Besides the Scorpion of Fig. 1094, Mazon Creek has afforded Mazonia 

 (Eoscorpiiis) Woodiana M. & W., Architarbus rotundatus Sc, allied to the Phalangidse, 

 Arthrolycosa antiqua Harger (Fig. 1095), Geraphrynus carbonarius Sc, the long-tailed 

 Geralinura carbonaria Sc. From Arkansas has come Anthracomartus trilobitiis Sc. ; 

 from Rhode Island, another species of Anthracomartus; from Nova Scotia, Mazonia 

 Acadica Sc. 



12. Insects. — (a) Neuropteroids. — From Morris, 111. , Miamia Bronsoni D., Hemeris- 

 tia occidentalis D., Chrestotes Dance Brgt., C. lapidea Sc, Megathentomum pustulatum 

 Sc, Genentomum validum Sc, Anthracothremma robusta Sc, and others. From Pittston, 

 Pa., species of Dieconeura and Poly emus. 



(6) Orthopteroids. — Of the Cockroach group there have been found : at Mazon Creek, 4 

 species of Mylacris, 2 of Promylacris, 2 of Paromylacris, 1 of Archimylacris, 2 of Etoblat- 

 tina, 1 of Progonoblattina, and 1 of Oryctoblattina ; in Pennsylvania, 6 of Mylacris, 2 of 

 Neomylacris, 1 of Archimylacris, 3 of Lithomylacris , 1 of Promylacris, 1 of Etoblattina, 



1 of Gerablattina ; at Cassville, W. Va.,6 of Etoblattina, 15 of Gerablattina, 1 of Anthra- 

 coblattina, 3 of Poroblattina, and 1 of Petrablattina ; at Richmond, Ohio, 17 of Eto- 

 blattina, 3 of Gerablattina, and 2 of Poroblattina ; near Providence, R. I., 8 of Etoblattina, 



2 of Gerablattina, and 1 of each Mylacris and Microblattina ; and a fev7 others in 

 Missouri, Kansas, Arkansas, Nova Scotia, and Cape Breton. Orthopters of the Proto- 

 phasmid type occur at several of the above localities. 



Of Carboniferous Hemipteroid Insects, which are not uncommon in Europe, a species, 

 Phthanocoris occidentalis, occurs near Kansas City, Mo. Of Coleopteroid Insects, no 

 American species have yet been reported. 



The above lists of fossil Myriapods, Arachnids, and Insects are from Mr. Scudder's 

 publications and correspondence. See his Bulletin No. 31, U. S. G. S., for a review of the 

 subject up to 1886 ; also, Bulletin No. 71, 1891, for a full index by him to the known fossil 



