Index Volume XVIII. 



Acrothecium recurvatum, n. sp.. 



44; PI. HI, fig- 21. 

 Arcyrioides, 40. 



Aecidium berberidis on Podo- 

 phyllum, 47. 

 Aeschna clepsydra Say, 1 14. 



constricta Say, 1 14. 



verticalis Hazen, 1 14. 



.Eschninae, 108. 



Agaricus (Galera) lateritius Fr., 36. 



(Clytocybe) ochro-purpu- 

 reus, 46. 

 Agrionime, 105. 

 Ambrosia trifida, 47. 

 Amnicola cincinnatiensis, 96. 

 Amplexopora pustulosa Ulrich, 72. 

 Amphiagrion saucium Barm, 113. 

 Anax junius Drury, 1 10, 114. 

 Ahculosa; Cincinnati species of 



the genus, 97. 

 Aucylus; Cincinnati species of the 



genus, 96. 

 Anisopteryx, 149. 



Anodonta; Cincinnati species of 

 the genus, 103, 104. 



Anomalagrion hastatum Say, 106- 

 113. 



Anorthite, 61, fig. 1 g. 



Anthonomus grandis, 154. 



Aralia racemosa at Cincinnati, 48. 



Argia apicalis Say, 113, 114. 



putrida Hazen, 1 10, 113. 

 sedula Hazen, 1 13. 

 tibialis, 1 13. 

 violacea Hazen, 113. 

 Argentite, 61, fig. 1 b. 

 Argynna, gen. now, 41. 



polyaedron (Schw.), 41, 

 PI. II, fig. 14. 



Asimina triloba, the host of a fun- 

 gus, 43. 



Asochyta cornicola Sacc, 50-55. 

 Asteroidea; fossil of Cincinnati. 

 126. 



Asterostroma Massee, 38. 



pallidum, n. sp., $8, 

 PI. I, fig. 6. 

 Atactopora hirsuta Ulrich, 78. 



maculata Ulrich, 78. 

 tenella Ulr., 79, 80. 



Atactopora mundula Ulr., 79, 80. 



multigranosa Ulrich, 

 79, 80. 



Atactoporella multigranosa (Ulr.), 

 79, 80. 

 mundula (Ulr.), 79, 

 80. 



schucherti Ulrich, 



79, 80. 

 tvpicalis Ulrich, 79. 



80. 



Atrypa marginalis, 171, 193, 196. 



marginalismutistriata, 196 

 reticularis, 198, 199. 



Augite, 61. fig. 1 f, PI. IV. 



Autenheimer, F. A., resigned, 1. 



Ayres, Ph. W., member, 2. 



Azelacrinites, 186. 



Bail, H. E., member, 3. 



Barnes, Ch., resigned, 4. 



Barton, E. H., resigned, 4. 



Basiaeschna janata Say, 112. 114. 



Bettman, Dr. H. \V., member, 2. 



Belfast bed of Ohio, 161. 



Bigney, Dr. P. 11., trustee, 2; de- 

 ceased, 4. 



Blissus leucopterus, distribution 

 in Centr. & N. Am. PI. V. 



Blissus leucopterus, probable ori- 

 gin and diffusion, 141. 



Blissus leucopterus, area of great- 

 est abundance in N. A. 148, fig. 1. 



Bolbitius radians, n. sp., 36; PI. I, 

 fig. 1. 



Bolinia, 42. 



Bovista pila B. & C. 39. 



Call, R. K. : Illustrations of little 



known Uiiionidae, 157. 

 Callopora, 1 19. 



magnipora, 184. 



milfordensis James, 122. 

 Calloporella (?) verrucosa Ulrich, 



85- 



Calopteryx maculata Beaur, 113. 



aequabilis Say, 113. 

 Calvatia leiospora, n. sp., 39; PI. II, 

 fig. 8. 



hesperia, 39; PI. II, fig. 9. 

 Calvmene niagarensis, 185. 



vogdesi, 167, 169, 171, 195 



