472 



Diatoms, habits of, 3(51. 



Dicladia capreolus, 79, 439. 



Dictyocha, sp, 81. 



speculum, 76. 



tibula, 76. 



Dighton rock, 305. 



Digits, supernumerary, in a cat, 3. 



Diplax, 3il; development of, 3i35. 



abjccta. 293, 294. 



aii'ibusta, 293, 294. 



asjimilata, 294. 



justiniana, 293. 294. 



ochracea, 293, 294. 



— rubicundula,294,297. 



rutiucrvis, 297. 



Dijitera in .salt water. Ill, 387; in petro- 

 leum. 111. 



Distorted wkull of child from Hawaiian 

 Islands, 70; distorted pebbles in con- 

 glomerate, 330. 



D.)lomede.s albineus, 103. 



lanceolatus, 103. 



sGxpunctatus, 103. 



Donations of Dr. Hryant, 214. 



Dulus (loniiiiicus, 92. 



Dvlheniis aMinalis, 293. 



— debilis, 293. 



dicrota, 292, 293, 300. 



didyma, 292. 



exhausta, 293. 



frontalis, 292, 293, 298. 



nreva, 293. 



pleurosticta, 292. 293, 298. 



rufinervis, 292, 293, 299. 



Earth, infusorial, fr,!m Peru, 75. 



Eclieneis romora, 325. 



Echinoderm fauna of the Burlington 

 Limestone of Iowa, 6. 



Echinoderms, classification of, 286. 



Economy, insect, 326. 



Edwards, A. M. Note on a point in 

 the habits of the Diatomaceze and 

 DesmidiacK, 361. 



Eels in cod, 364. 



Eggs of Diapheromera, longevity of, 88, 

 89. 



Election of Members, alteration of By- 

 Laws concerning, 284; election of 

 officers, .32, 84, 114, 187. 



Elcpha.s ])rimigenius, 304. 



Elm. svmmi'trv in leaves of, 313. 



E-\!Ki;s()X, G.'B. On the changes oc- 

 curring in the leaves of the cabbage 

 plant, 84. 



Encyonenia, 75. 



Ent.nnology, formation of section of, 87. 



Epelra, 287. 



alba, 108. 



aureola, 108. 



b imliyciuaria, 108. 



cancer, 108. 



caudata, 108. 



(aroli, 108. 



corniirera, 108. 



direcfa, 108. 



disiilieata, 108. 



domiciliorum, 108. 



fasciata, 108. 



Epeira foliata, 108. 



gibberosa, 108. 



hamata, 108. 



hebes, 108. 



heptagon, 108. 



hortorum, 108. 



iiifumata, 108. 



labyriutliea, 108. 



maiu-a, 109. 



mitrata, 109. 



nivea, 109. 



ol)esa, 109. 



])entagi>na, 109. 



placida, 109. 



pratensis, 109. 



liiMmi)ta, 109. 



ri]}aria, 109. 



rul)ella, 199. 



rubens, 109. 



riigosa. 109. 



sanguinalis. 109. 



scutulata. lo9. 



septiuia. loy. 



.spiculata, 109. 



stellata. 109. 



sutrix, 108. 



Thaddeus, 109. 



trif. ilium, 109. 



Vi'i-ruc:;sa, 109. 



vulgaris, 109. 



Ephydra, 387, 388. 

 Ejublemum faustum, 106. 

 Epigipa repeus, 115. 

 Episema gr.thica, 39. 

 Eiiithi'ca, £9i. 

 Ei)ithemia, 3 3. 

 Eristalis, 337. 

 Erythemis furcata, 293. 



^ longiiies, 293. 299. 



specularis, 293, 299. 



Eudamus IJathvUus, 381. 



Lvcidas, 381. 



Tityrus, .381. 



Eudorea albi'ulmiaftUa, 53. 



centurielia, 53. 



frifiidella. £3, 465. 



Eunotia Ehreubergii, 133. 



obtusa, 1.33. 



teti-a^ulun, 1-33. 



Euodia gibba, 77, 78. 

 Euplionia. 92. 

 Eupithecia gelidata, 46. 



liiteata, 4'5. 



Eupodiscus crassns, 81. 



punctulatus, 80. 



Euprepia caja, 83. 



Euptoieta Claudia, 379. 



Expedition to the Kevillagigedos Isl., 273. 



Falco peregrinus, 64. 



domniicensis, 90. 



Feathers, condition of, after long use, 



278. 

 Fire-sticks. 285. y.^ -^ ^ 

 Fish, habits of, 100, 125, 360. 

 Fish raising, 360. ^ ^ 



Fish-ways, construction of, 129. -^ 

 Fishes o"f Massachusetts, 318. '-- 

 Flabellaria ventricosa, 75. 



