616 
Annelida, 42. 
Annulata, 136. 
Anodonta, 486, 491. 
corpulenta, 287. 
grandis, 473, 488, 491, 558. 
Anodontoides, 486, 491. 
ferussacianus, 473, 488, 491. 
Anthophysa vegetans, 67, 68 
Anurea, 153, 157, 159, 165. 
aculeata, 147-149, 210, 328. 
var. brevispina, 149. 
var. curvicornis, 149. 
var. valga, 149. 
cochlearis, 149-154, 155, 292, 329. 
var. hispida, 151. 
var. irregularis, 151. 
var. macracantha, 
329. 
var. stipitata, 149, 152, 154, 329. 
var, tecta, 149. 1525153, 154, 292) 
329. 
var. typica, Lod, 152. 
hypelasma, 154-156, 292, 329. 
serrulata, 149. 
Aphanizomenon flos-aque, 19. 
Aphredoderus sayanus, 419, 437. 
also Pirate-perch. 
Aplexa, 492. 
149, 
See 
hypnorum, 454, 462, 464, A77, 481, | 
486, 488, 492. 
Aplodinotus grunniens, 390, 424, 437. 
See also Sheepshead. 
Apsilus lentiformis, 140. 
Arachnida, 283, 284. 
Arcella, 97-102. 
artocrea, 100. 
costata, 98. 
discoides, 98-100, 325. 
mitrata, 100. 
polypora, 100. 
stellata, 100. 
vulgaris, 98, 99, 100-102, 325. 
Arcidens confragosus, 288. 
Arctomys franklinii, 528. 
monax, 532. 
Argulus sp., 261. 
Ariophantine, 495. 
INDEX 
Arisema dracontium, 453. 
triphyllum, 363, 477. 3 
Arrow-head, Broad-leaved, 466. 
Arthrodesmus, 62. 
Arvicola austerus, 551. 
riparius, 551. 
scalopsoides, 556. 
Asclepias incarnata, 453. 
Ascomorpha ecaudis, 162. 
Aspen, American or Trembling, 451, 458, 
463, 466, 475, 479, 481. 
Aspidiogaster conchicola, 135. 
Aspidisca costata, 118. 
Aspidium cristatum, 466. 
thelypteris, 466. 
Asplanchna, 114, 124. 
brightwellii, 156-159, 160, 292, 330) 
ebbesbornii, 159. 
girodi, 160. 
herricki, 160. 
priodonta, 159, 160-162, 330. 
Asplanchnopus myrmeleo, 162. 
Asterionella. 35.) 45.040) 4:/en Sonn ov aes 
79. 
formosa, 43. 
gracillima, 43, 44-45, 317. 
Asterosiga radiata, 67, 68. 
Atalapha cinerea, 599. 
noveboracensis, 597. 
Atax, 283. 
Attheya, 43. 
Aulacopoda, 495. 
Auriculide, 494. 
Aves, 472. See also Birds. 
B 
Bacillariacee, 13, 14, 16, 20, 34-59, 63, 
64, 65, 66, 67, 220, 291, 292, 294, 296, 
297, 298, 299, 300, 307, 310, 317. 
Back-swimmer, 450, 454, 458, 461, 464, 
467, 470, 473. 
Bacteria. 1O;'6Sn1tiSe lillGnstet 7mluhe On 
QO DAS AD Sele Onn roe 
Bacteriacee, 13, 16, 18-19. 
Badger, 562, 574. 
Basommatophora, 492. 
