ISOPODA. 
Crust i 38 
are to be added, and 302 species, some new, but not described (they will, 
therefore, not be mentioned here). The author notes the species existing 
in the Museum of Copenhagen (95), and a part of those in the Berlin 
Museum. 
J. Schobl has continued his observations on the breeding of Oniscidae^ 
having kept a large number of living specimens (chiefly Porcellio scaber) 
in confinement. He describes the female orifices on the ventral part of 
the fifth segment, the oviducts, ovary, and receptaculum seminis, and 
the act of copulation ; those parts of the male which have been called by 
former authors accessorial, are the true intromitting organs ; after fecun- 
dation the female becomes very inactive, losing the female orifices and 
receptacula seminis at the next moult. The fecundated eggs penetrate 
from the oviducts into the abdominal cavity, and from this by a median 
cleft in front of the sixth segment into the cavity formed by chitinous 
processes at the under surface of the body (incubatory cavity). During 
incubation, another set of ovula is ripened in the ovaries, and fecundated 
by the spermatozoids which have remained in the oviducts or at the 
entry of the ovary, and a second brood is produced by the same female 
without fresh copulation. A new moult follows afterwards, by which 
the female orifices are again opened, and a new fecundation becomes 
possible. The spermatozoids are moveable in a certain degree. SB. 
bohm. Ges. 1879, pp. 339-351 ; also in Arch. mikr. Anat.xvii. pp. 125-140. 
Hemilepistus, subg. n. of Porcellio ; type, P. hlugi (Brandt), Budde 
Lund, 1. c. p. 4. 
MetoponorthuSy subg. n. of Porcellio ; type, P. glaher (L. Koch), id. 
ibid. 
Leptotrichus, subg. n. of Porcellio \ types, P. truncatus and ciliatus 
(Brandt), id. 1. c. p. 5. 
Stymphalus, g. n., near Styloniscus (Dana) ; type, dilatatus (Perty), id. 
1. c. p. 9. 
Syspastus, new name for Helleria (Ebner, 1868) [cf. Zool. Rec. v. 
pp. 522 & 520] ; id. ibid. 
Serolidjj. 
Serolis cornuta, sp. n., ovalisy sp. n., = septem-carinata (Miers, 1875), 
and latifrons (White), all from Kerguelen Island, fully described. They 
live oil sandy ground, half creeping, half swimming ; in the third species 
the last pair of abdominal feet are transformed into a knife-shaped 
sting, which can be spread outwards and fixed in position by an aceta- 
bulum-like notch in the caudal shield, like a clasp-knife, or the pectoral 
sting of many Siluroid fishes. Studer, Arch. f. Nat. xlv. pp. 19-34, pi. iii. 
figs. 1-19 ; knife-apparatus, figs. 20-23; medullar string, fig. 24. 
Cirolanid;e. 
Barybrotes (g. n.) indus and agiliSy spp. nn., Schiodte & Meinert, Nat. 
Tids. xii. p. 279, Indian Seas. 
Icochcea (g. n.) crassipesy sp. n., iid. ihid.y Indian Seas. 
