INDEX. 



5 6l 



Diaptomus siciloides — Continued. 

 distribution of, 183. 

 eggs of, 155. 

 females of, 100. 

 signicauda, 98, 114, 120, 157, 159, 

 i6o, 164-166. 

 distribution of, 183. 

 signicaudatus, 164. 

 similis, 132, 182. 



species of, insufficiently de- 

 scribed, 181. 

 stagnalis, 97, 101, 113, 115, 136, 

 138-141, 142, 164. 

 contrasted with Diaptomus 



lintoni, 129. 

 distribution of, 183. 

 theeli, 101. 

 trybomi, 98, 112, 120, 158-160, 166. 



distribution of, 183. 

 tyrrelli, 99, 108, 119, 160, 176- 

 178. 

 distribution of, 184. 

 wierzejskii, 101, 107. 

 zachariasi, 99. 

 Diaspis amygdali, possible syno- 

 nym of, 398. 

 piricola, resemblance to Aspidi- 



otus ostreaeformis, 398. 

 snowi, resemblance to Aspidio- 

 tus ancylus, 398. 

 diastrophus, Chaetogaster, 443. 

 Diatoms, 12, 311, 421. 



as food of Opercularia irritabilis, 

 340. 

 of Protozoa, 311. 

 of Rotifera, 351, 373. 

 Didinium, 331. 



nasutum, 313, 331. 

 Difflugia, 274,305,306,312, 318,421. 

 aculeata, 313, 314, 320. 

 acuminata, 313, 319. 

 as food of fishes, 312. 

 corono, 313, 314, 320. 

 cratera, 336. 

 food of, 311. 



Difflugia — Continued. 



fragosa, 312, 313, 320. 

 figures of, 321. 



globulosa, 312, 313, 314, 318, 320. 

 as food of rotifers, 351, 364. 



lobostoma, 313, 314, 319, 320. 



pyriformis, 313, 314, 319. 

 compressa, 319. 

 vas, 319. 



tuberculosa, 313, 320. 



urceolata,3i9. 

 Diglena, 370. 



biraphis, 371. 



catellina, 370. 



forcipata, type of trophi of, 345. 



grandis, 370. 

 dilatata, Euchlanis, 374. 

 Dileptus, 331. 



anser, 332. 

 Dina, 533, 535. 



fervida, 535~537. 54Q, 541. 



annulation and metamerism of 



1 



compared with those of Er- 

 pobdella punctata, 535. 



color of, 537. 



diagnosis and general descrip- 

 tion of, 535. 



reproductive organs of, com- 

 pared with those of Erpob- 

 della punctata, 536. 

 mexicana, 541. 

 microstoma, 537-541. 



annuli and somites of, 539 541. 



color and reproductive organs 



of, 541. 



' diagnosis of, 537. 

 general description and metam- 

 erism of, 537-539- 

 Dineutes, Megalotrocha scmibul- 



lata eaten by, 361. 

 Dinifera, 329. 

 Dinobryon, 274, 323, 421. 

 sertularia, 312, 313, 323. 

 angulation, 323. 

 divergens, 323. 



