INDEX 431 
Najades, anal and branchial openings, 312 
anal siphon, 313 
anatomical investigations, 282 
arrangement of the ova and embryos 
in marsupium 297 
Bibliography, 338 
branchial opening, 313, 314 
bradytictic forms, 304 
breeding season, 302 
differentiating structures on edge of 
gills, 294 
discharge of the glochidia, 305 
division into families and subfamilies, 
322 
edge of the mantle in front of branchial 
opening, 315 
eye-spot, 318 
found in Pennsylvania, 334 
general structure of the gills, 284 
glochidia of, 299 
hermaphroditism, 308 
ova and larve (glochidia), 297 
of Pennsylvania, Monograph on, 279- 
347 
sex recognition in the young, 310 
structural features of the finer anat- 
omy of the gills, 290 
summer-breeders, 303 
supra-anal opening, 313 
suprabranchial or cloacal canal, 286 
tachytictic forms, 304 
water-tubes and septa dividing them, 
290 
winter-breeders, 303 
namiyei, Salarias, 203 
Narcine molini, 351 
Naseus, 391 
nuchalis, 381, 402 
rectifrons, 382, 406 
nasus, Dorosoma, 167 
nasuta, Lampsilis, 287, 296, 302, 312, 318, 
334 
Nebraska beds of Scott, 75 
Nebraska, Quarry of University of, 72 
. Nemipterus japonicus, 186 
matsubare, 186 
Nemipterus ovenii, 185 
virgatus, 186 
niger, Apolectus, 179 
nigrescens, Halichceres, 195 
nigricans, Cheetodon, 381 
Girella, 190 
nitidus, Liachirus, 201, 202 
Niu e, 198 
noteus, Lates, 374 
notata, Archamia, 181 
notatus, Apogon, 181 
Sparus, 181 
Notes on the Classification of Teleostean 
Fishes, 358 $ 
Notes on a Collection of Fishes from the 
Island of Formosa, 159 
upon the ‘‘Shuo Wén,” 1, 18-19 
Nothocyon annectens, 206 
novi-eboraci, Lampsilis, 317 
nuchalis, Naseus, 381, 402 
Pygzeus, 380 
nuda, Gymnosarda, 177 
nyctemblema, Choirodon, 195 
nyctereutes, Pempheris, 181 
nystromi, Leptocephalus, 172 
obliqua, Quadrula, 292, 314, 330, 331 
Obliquaria, 297, 315, 316, 326, 332, 333, 
334, 337 
reflexa, 287, 296 
obliquum coccineum, Pleurobema, 346 
oblonga, Mene, 367, 396 
oblongus, Ephippus, 380, 381, 402 
Obovaria, 297, 315, 316, 326, 332, 333, 338 
circulus, 287, 296, 302, 346 
ellipsis, 296 
ligamentina, 345, 346 
retusa, 287, 296, 302, 314 
occidentalis, Canis, 211-213 
ocellatus, Spheroides, 199 
ocyurus, Plectorhynchus, 187 
Odontaspis hopei, 352 
Odonteus, 391 
sparoides, 379, 406 
sparoides var. depressus, 379 
Odontorcion, 191 
