Index 



141; movements, 141, 148; mi- 

 gration, 142, 143-149, directions 

 of dispersal, 144, figures illus- 

 trating, 145, 148, influence of size 

 and sex, 148; fishing of, 142, 148, 

 effect on extinction of, 149; sex, 

 148, sex ratio, 131, 152; census 

 of, 149; reproduction, 149-151; 

 exuviation, 151. 



Parabasal body, definition, 194, 195, 

 229; nuclear behavior, 198; de- 

 velopment, phylognetie, 206-209, 

 in Haemoflagellata, 209-215, in 

 Bodonidae-Trichonymphidae, 215- 

 227-229; origin, 218, 228; evo- 

 lutionary development, 211, 212, 

 215, 221, 224, 225, 226; homology 

 with mitochondria, 226; with 

 chromatic basal rod, chromidial 

 bodies, kinetonuclei, 227; tropho- 

 nucleus, 227 ; nuclear value, 230- 

 232; basis for classification, 232- 

 233. 



Paradesmose, definition of, 207. 



Paraisotricha colpoidea, 96. 



Paralabrax maculatofaseiatus, 161. 



Paralepididae, 154. 



Paramecium, method of food-getting, 

 175. 



Paramoeba eilhardi, eentrosome in, 

 189. 



Parasitic forms, origin of, 208. 



Parasitism, effects on protozoan cell, 

 207, 208. 



Patellina corrugata, reproduction in, 

 190, 191. 



Pelomyxa, gamete formation, 192. 



Peridinium cerasus, food for cope- 

 pods, 177. 

 divergens, food for copepods, 177. 



Peromyscus manlculatus ganibeli, 23. 



Perophora, 443. 

 annectens, 464. 



Petalotricha ampulla, 66. 



ampulla, 66; figures of, 67. 

 entzi, 66; diagnosis, 66; descrip- 

 tion, 66; dimensions, 68; com- 

 parisons, 68 ; figures of, 67. 



Phallusia (ascidia), 442. 



Piroplasmida, binuelear condition, 

 203. 



Pizon, A., cited on asexual reproduc- 

 tion in Diplosoma listeri, 476. 



Plankton, nanno- or centrifuge, food 

 for copepods, 177, 181 ; food for 

 freshwater cladocera, 181. 



Plankton copepods, rhythm in geo- 

 tropism of, 393-400. 



Plankton organisms, responses (re- 

 actions), 382-389; necessity for 

 comparisons illustrated, 383-385 ; 

 effect of laboratory conditions, 

 385-387, of habitat, 386, 389. 

 See also Behavior; Copepods. 



Planktoniella, food for copepods, 178. 



Plasmodidae, binuelear condition, 203. 



Plasmodiophora brassicae, gametic nu- 

 clei, 192. 



Plasmodium, parabasal body, 203. 

 vivax, life cycle, 204. 



Playa del rey,"l57, 164. 



Plethodon, cultivation of tissues from, 

 56. 



Pleuromamma abdominalis, 179. 

 quadrungulata, 179. 



Pleuronichthys coenosus, 169. 

 ritteri, 169. 

 vertiealis, 168. 



Polycitoridae, 489. 



Polygyra armigera. 111. 

 Columbiana, 111. 

 armigera. 111. 

 pinicola, description, 110; type, 

 110; type locality, iii; remarks, 

 iii. 



Polymastix, 129, 134. 



bufonis, 131, 220, figs. 43-50, 222, 

 figs. 51-57; morphology, 131; 

 mitosis, 132, 134; figures" of, 130, 

 opp. 136, 138; division centers in 

 cell, 210; neuromotor apparatus. 

 214; description, 221; parabasal 

 body, 221; chromidial body, 223, 

 227. 



Folymastix and Monocercomoiias 127 ; 

 differences between, 134. 



Polystomella crispa, gametic nuclei, 

 190. 



Polyzoa, 443. 



translucida, superficial character- 

 istics, 460 ; zooids, 460 ; branchial, 

 and digestive, systems, 460 ; re- 

 productive system, 461 ; habitat 

 and distribution, 461 ; figures of, 

 opp. 494, 502. 



Prorocentrum, food for copepods, 187, 

 180. 



Protozoa, binuclearity, 189; classi- 

 fication, 189. 



Prowazek, S. von, binuclearity, of pro- 

 tozoa, 189, in Trypanosoma lew- 

 isi and T. brneei,"l97, 198. 



Prowazekia cruzi, parabasal body, 

 215, 218, 227; figures of, 216. 

 lacertae, 216 figs. 23-32; parabasal 

 body, 215, 218. 



Purington, Mrs. E. H., acknowledg- 

 ment. 96. 



Pyura (Halocynthia), 442. 



Quietula y-cauda, 164. 



Raja inoruata, 1-53. 



Redondo, 165. 



Ehizomastigina, life cj-cle of, 205. 



Rhizoplast, method of attachment, 

 213, illustrated, 213 fig. 18. 



Rhizopoda, life cycles, 204, 205. 



Ritter, W. E., 439; acknowledgment, 

 139, 153; cited on ascidian tax- 

 onomy, 446, on Metandrocarpa 

 dura, 459. 



[520] 



