41 Orust. 
CRUSTACEA. 
its structure be fecundated ; in Polyphemus, the sexual female only pro- 
duces winter-eggs, and never other eggs without fecundation (pp. 110-214). 
The author discusses in a hypothetical manner the phylogenetic origin of 
those changes of generations, and their relations to other alternations of 
generation, pp. 214-264. 
An abstract of Kurz’s paper on limicolous Cladocera [Zool. Rec. xv. 
Crust, p. 39] in J. R. Micr. Soc. ii. pp. 153 & 164. 
SlDID^. 
Daphnella winchelli, sp. n., 0. L. Herrick, Rep. Geol. Surv. Minnesota, 
vii. p. 122, near Minneapolis. 
Daphniidj<i. 
Daphnia hairdi^ sp. n., Graham, Naturalist, ii. p. 217, Birmingham ; 
= Hyalodaphnia hahlhergiensis (Schodler) : E. Ray Lankester, J. R. 
Micr. Soc. ii. p. 877. D. spinosa^ sp. n., Herrick, 1 . c. p. 105, pi. xiii. 
fig. 1, Lake Calhoun, Minneapolis. 
Macrothrix agilis, sp. n., Herrick, 1 . c. p. 106, pi. xiv., Rocky Lake, near 
Minneapolis. 
Moina rectirostris (Baird). For history of development by Grobben, 
see above, in General Subject. 
Moina hathycola, sp. n., Vernet, Bull. Soc. Vaud. xv. [1878] pp. 528-530, 
pi. ix. fig. 23, Lake of Geneva, in deep water. 
Lynceidjj. 
Alona verrucosa, sp. n.. Lutz, MT. Ges. Bern, 1879, p. 38, Bern. 
Copechcete (Hesse) [Zool. Rec. xv. Crust, p. 41] ; abstract in J. R. Micr. 
Soc. ii. p. 424. 
POLYPHBMIDj;. 
Polyphemus occidentalis, sp. n., Herrick, 1. c. p. 122, Mud Lake, Minne- 
apolis. 
Bythotrephes asovicus, sp. n., N. Pengo, Monograph [see Titles], with 
general remarks on the genus, and plate. Sea of Azof. 
Corniger, g. n. [name preoccupied in Pisces]. “ Caput a corpore parva 
impressione disjunctum atque valde deorsum spectans ; testa testam 
corporis non attingente praeditum et in tubum, dua magna cornua 
gerentem, productum. Ramorum secundi paris antennarum unus tri- 
articulatus, alter quadri-articulatus, uterque setis septem, quarum quinque 
articulo ultimo et singulas unicuique posteriori adfixae, prseditus. Pedes 
omnes appendice externa tereti, setifera et interna dentata, ciliata. 
Aculei caudales magni, deflexi sursum versus. Setae caudales brevis- 
simae. C. mceoticus, sp. n., Pengo, 1. c. 10 pp., plate. Sea of Azof. 
Leptodora hyalina (Lillj.). Anatomy described by H. R. Forrest, 
J. R. Micr. Soc. ii. pp. 826-834, pis. xxiv. & xxv. Found in a deep pool 
near Birmingham ; Lubbock, Rep. Br. Ass. (Sheffield), 1879, p. 369. 
