6/4 



NORTH AMERICAN INDEX FOSSILS. 



i8. D. cylindricus, TJ, a 



19. D. latibrachiatus, U, a 



20. D. cincinnatiensis, TJ, d 



21. D. caduceus, U, d 



22. D. casei, TJ, d 



152. Retiocrinus stellaris, TJ, a 



157. Hercocrinus elegans, M, a 



158. H. ornatus, M, a 



160. Archaeocrinus pyriformis, TJ, a 



166. Glyptocrinus ramulosus, TJ, a 



167. G. decadactylus, TJ, d 



168. Periglyptocrinus priscus, M, a 

 191. Cleiocrinus regius, TJ, a 



194. Taxocrinus elegans, TJ, a 



SiLURic Faunas. 

 The following provinces are recognized: 



(a) 

 (&) 

 (0 

 (d) 



(/) 



Maine to Anticosti and Arctic extension. 



New York to Ontario. 



Southern Appalachians. 



Cincinnati-Nashville domes. 



Michigan basin (Michigan, Wisconsin, and Canadian ex- 

 tension and northern parts of Ohio, Indiana, and 

 Illinois). 



Ozark dome, and Iowa extension. 

 {g) Winnipeg and Hudson Bay. 

 {h) Rocky Mountains and Northwest. 



PORIFERA. 14. 



1. Astylospongia praemorsa, L, d 21. 



2. A. inciso-lobata, L, d ^^' 

 *3. Hindia fibrosa, L, d 24. 



8. Astrseospongia meniscus, L, d 30. 



10. Receptaculites hemisphsericus, L, e 46. 



11. R. ohioensis, L, e 47- 



48. 



Graptolites. 51- 



2. Dictyonema retiforme, L, b So. 



3. D. gracilis, L, b °^* 



32. Monograptus clintonensis, L, b 64. 



33. Retiolites venosus, L, b 69. 



75- 



Hydrocorallines. 7^' 



4. Clathrodictyon vesiculosum, L, a, 82. 



b, e 83. 



5. C. striatellum, L, b 84. 



6. C. ostiolatum, L, TJ, b, e 105. 

 13. Stromatopora antiqua, L, b 106. 



108. 



AnTHOZOA. III. 



4. Streptelasma caliculum, L, b 114- 



10. Zaphrentis stokesi, L, a, e 120. 



Amplexus shumardi, L, d, e, f 

 Pycnostylus guelphensis, L, e 

 Chonophyllum niagarense, L, b, d 

 Ptychophyllum stokesi, L, d, e 

 Palaeocyclus rotuloides, L, b 

 Strombodes pentagonus, L, d, e 

 S. striatus, L, d, e 

 S. mamillatus, L, d, e, f 

 Eridophyllum rugosum, L, d 

 Diplophyllum caespitosum, L, b, e 

 Duncanella borealis, L, e 

 Calceola tennesseensis, L, d 

 Romingeria umbellifera, TJ, e 

 Syringopora verticillata, L, e 

 S. retiformis, L, b, d 

 Favosites venustus, L, b, c, d, e 

 F. favosus, L, b, d, e, f 

 F. niagarensis, L, b, d, e, f 

 Thecia major, L, d, e 

 T. minor, L, d, e 

 Alveolites niagarensis, IJ, d, e 

 Cladopora laqueata, L, d, e 

 C. seriata, L, b 

 Striatopora flexuosa, L, b 



