Cincinnati Society of Xaturat History. 



Deer Creek sewage, cause of epi- 

 demic dysentery, 29. 



Dekayia, 155. 



Derniodium coiiicum, 134. 



Devonian, rocks of, in Ohio, 166; 

 chert in, 166; fossil forms of, 166. 



Dictydium, 136; genus defined, 

 142; D. cernuum, 142; longipes, 



143- 

 Diplotrypa, 155. 

 Donations, 2, 104. 

 Dust, promotes formation of fog, 



17; instrument for counting par- 

 ticles of. 18. 

 Dust and fog, 17. 

 Dury, Charles, on Limax maximus, 



62', 63; remarks on albino robins, 



103; Mordellidse of Cincinnati, 123. 

 Dyciie, Dr. D. T. D., remarks on 



roots and stems of crinoids, loi. 

 Election of officers, 60. 

 ICverhartia, 51 ; hymenuloides, 51. 

 Exchanges, domestic, 104; foreign, 



107. 

 Eaber, Chas. L. Paper read. Age 



of the Point Pleasant beds, 2. 

 Faber, Chas., (with :Miller, S. A.). 



Some new species and structural 



parts of fossils, 79. 

 Favistella, defined, 97 ; V . stellata, 



98; calicina, 99. 

 Favosites, 147, 152. 

 Ferris, A. A., report as trustee, 65. 

 Fistulipora, 155. 

 F'og, producer! by condensation of 



water upon finely divided matter, 



17; produced by products of 



combustion, 17; analysis of, 18; 



death rate increased by, iS. 

 I'ogs, effect of, on plants, 19; causes 



disease, 19; increases death rate, 



'9- 



Foreigners, predisposed to dis- 

 ease, 37. 



Fort Ancient, observations con- 

 cerning, by Dr. S. S. Scoville, in; 

 description of ground and water 

 courses in, in; suggestions as to 

 the builders, 120, 121; analogy 

 with great wall of China, 121 ; 

 this points to common origin, 

 121 ; not constructed at one time, 

 122; high ground enclosed by 

 fort probably occupied before 

 construction of walls, 123; used 

 by village inhal)itants as refuge, 

 123; direction of streams around 

 and in, n2 ; small streams in, not 



artificial ditches, 113; streams 

 deepened to strengthen works, 

 113; "peninsula" the true water 

 divide, n3 ; parallel walls, n4; 

 moats, 114; guarded way and 

 moats, purpose of, n4, ns; 

 mound used as observatory, n5; 

 guarded way a military structure, 

 n5 ; embankments on neck of 

 the peninsula, \\^\ height of 

 embankment, n5; highest em- 

 bankment, n6; even summit 

 range, n6; embankments not 

 originally higher than now, n7; 

 structure of embankments ob- 

 served, 117; wash of walls since 

 first built, 117; embankments re- 

 constructed, n7; north eastern 

 part an assembly ground, n8; 

 crescent, or semi - circle, u8 ; 

 part of a complete circle, 118; 

 gate ways, ng; use of, ng, 120. 



Fucoides, assemblage of various 

 fossils under this genus, 76. 



Fucoides, considered algit by Bron- 

 gniarl. 76. 



Gibson, Wm., life member, death 

 of, 2. 



(rlipodes sericans, 124. 



Grimsley, G. Perry, microscopical 

 study of Ohio limestone, 160. 



Halysites catenulata, 153. 



Ilelicoma, 45; H. larvale, 45; am- 

 biens, 46; polysporum, 46; re- 

 pens, 47; limpidum, 47; Ber- 

 keleyi,48; ambiguum, 48. 



Helicomyces, 39; H. olivaceous, 40, 

 41; gracillis, 40; cinereus, 41; 

 bellus, 42 ; scandens, 42 ; fuscus, 

 43; clarus, 44; elegans, 44. 



Helicuon, 49; H. thysanophorum, 

 49; sessile, 49; auratum, 50; 

 ellipticum, 50. 



Helicosponc, North American, 39. 



Heliolites, 150, 131 ; genus defined, 

 I.'i2; II. shepardi, 152. 



Heiiolilidie. 151. 



Henshall, Dr. J. A., report of Direc- 

 tor of Museum, 67; report as 

 Secretary, 68. 



Heredity, basis of life, 33; not 

 sufficiently considered in health 

 standards, 34. 



Heterotrypa, 155. 



Hippocrates, on effect of climate 

 on body, 6. 



Ilolocystiles affinis, 87 ; H. elegans, 

 87 ; Votnndus, 87 ; turbinatus, 87 ; 



