56r 



I 



Diaptonius siciloides — Continued. 

 distribution of, 183. 

 eggs of, 155. 

 females of, 100. 

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

 160, 164 166. 

 distributit)!! of, 183. 

 signicaudatus, 164. 

 similis, 132, 182. 



species of, insufficiently de- 

 scribed, 181. 

 stagnalis, 97, loi, 113, 115, 136, 

 138-141, 142, 164. 

 contrasted witli Diaptomus 



lintoni, 129. 

 distribution of, 183. 

 theeli, loi. 

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



distribution of, 183. 

 tvrrelii, 99, 108, 119, i6o, 176- 

 178. 

 distribution of, 184. 

 wierzejskii, loi, 107. 

 zachariasi, 99. 

 Diaspis amygdaii, possible syno- 

 nym of, 398. 

 piricola, resemblance to Aspidi- 



otus ostrezeformis, 398. 

 snowi, resemblance to Aspidio- 

 tus ancylus, 398. 

 diastroplius, ChiEtogaster, 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 — Con tin tied. ' 

 fragosa, 312, 313, 320. 



figures of, 321. 

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



as food of rotifers, 351, 364. 

 iobostoma, 313, 314, 319, 320. 

 pyriformis, 313, 314, 319. 

 compressa, 319. 

 vas, 319. 

 tuberculosa, 313, 320. 

 urceolata,3ig. 

 Diglena, 370. 

 biraphis, 371. 

 catellina, 370. 



forcipata, type of troplii of, 345. 

 grandis, 370. 

 dilatata, Euchlanis, 374. 

 I3ileptus, 331. 



anser, 332. 

 Uina, 533, 535. 

 fervida, 535-537, 540, 541. 



annulation and metamerism of^ 

 compared with those of Er- 

 pobdella punctata, 535. 

 color of, 537. 



diagnosis and general descrip- 

 tion of, 535. 

 repn)ductive organs of, com- 

 pared with those of Erpob- 

 della punctata, 536. 

 me.xicana, 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. 

 Dineutcs, Megalotrocha scmibul- 



lata eat'en by, 361. 

 Dinifera, 329. 

 Dinobryon, 274, 323, 421. 

 sertuiaria, 312, 313, 323. 

 angulatum, 323. 

 divergens, 323. 



