21(3 
CRUSTACEA. 
fig. 6, California, clarhi (sp. n., id. 1. c.), p. 619, pi. iii. fig. 7, Ohio, &c., 
and 4 known species, including helfragii (Pack.), pi. iii. fig. 8. Apo- 
DiD^: Lepidurus glacialis (Kroy.), pi. iii. fig. 9; A pm cequalis (Pack.), 
pi. iii. fig. 10, and 3 other known species (A. ohtmatus, James, ? =; 
longicaudatm^ Lee.). Branchipodid^ : Artomia gracilis (Verr.), pi. iv. 
fig. 11, and 2 other species ; Branchinecta arctica and grcenlandica 
(Verr.) and coloradensis (Pack.), ^ > pl* iv. fig- 12, all possibly one 
species ; Euhranchipus^ 1 species, and Streptocephalus texanus (Pack.), 
pi. iv. fig. 13, ^ . 
Nehalia hipes (Fabr.), from E. Greenland, ? = A. geoffroyi (M. E.) ; 
Buchholz, 1. c. pp. 388 & 389. 
Apus sp., in Tibetan salt lakes ; Schlagintweit, Beisen in Hochasien, 
ii. (1872) p. 218. 
Lepidurus productus (Bose.). Notes on its habits and development, the 
latter requiring shorter time (about six mouths) than that of Apus 
cancriformis \ Brauer, SB. Ak. Wien, lix. pp. 130-141, with 2 pis. 
Artemia salina (L.). C. T. v. Siebold, from breeding experiments, states 
that parthenogenesis occurs in this species. The animal is sometimes 
viviparous, sometimes oviparous, and there are two sorts of eggs, one 
provided with a firm shell secreted in the ovisac, which can resist drying 
for a longer time, and the other only provided with a very thin pellucid 
envelope, and hatched within the ovisac. SB. bayer. Ak. 1873, pp. 
168-196. 
CLADOOEBA. 
Laterally hermaphrodite individuals of Daphnia pulex (L.) and 
schcefferi (Baird), and Alona guadrangularis (Mull.), described by 
W. Kurz, SB. Ak. Wien, Ixix. pp. 1-7, pi. i. The author observes that 
the males of the Cladocera make their appearance not only in autumn, 
but also at other seasons, when circumstances (such as fouling or dry- 
ing up the water) occur likely to endanger the life of the females. 
Daphniid^. 
Moina (Baird) is intermediate between the Daphniince and Sididee : its 
vas deferens opens outwards, not into the intestine. M. micrura, sp. n., 
Kuttenborg, Bohemia. JCurz, oqt. cit. Ixx. pp. 6-9, pi. i. fig. 1. 
Daphnia. 8 Bohemian species comparatively characterized, including 
D. vitrea, apic<iki, and ohtusa, spp. nn., galdlea (Sars), and psiUacea 
(Baird) ; id. 1. c. pp. 10-19, pi. i. figs. 2, 3-5, 6-7, & 10. 
Ceriodaphnia reticulata (Jurine) and rotunda (Straus) described, the 
latter figured ; id. 1. c. pp. 20 & 21, pi. i. fig. 12. 
Macroihrix tenuicornis^ sp. n., described comparatively with M. lati- 
cornis (Jurine), id. 1. c. pp. 25-28, pi. iii. fig. 1, Bohemia. 
Ilyocryptus sordidus (Lievin), notes ; id. 1. c. pp. 28 & 29. 
Leptodora hyalina (Lilljeb.). The structure, histology, and biology 
of this interesting genus are fully described by Aug. Weissmann, who 
considers it to be one of the most primitive forms of its family. It has 
been observed swimming freely in the Lake of Constance and in the 
