ISOPODA PHYLLOPODA. 
199 
mysticetus (L.), Behring Strait: spp. nn. Dali, P. Cal. Ac. Nov. 9, 1872; 
the second again mentioned, ihid. December. 
ISOPODA. 
ONiSCIDiE. 
r W. Ainslie Hollis has observed in Porcellio scaher and 
0?iiscus asellus that the newly formed tooth of the mandible 
forces its way along the hollow limb of the old mandible, and 
that the maxillae, with their palpi, have a similar mode of growth. 
J. Anat. Phys. (2) x. p. 398, pi. 18. 
Porcellio domesticus, sp. n., Fric, Arch. Landesdurchf. Bohni. ii. p. 262, 
woodcut. Podebrad,' Bohemia. 
Mgidm. 
Slahberma ayilis (G. O. Sars), shortly described by A. Metzger, JB. Ges. 
Ilannov. xx. p. 32, islands on the shore of East Friesland. 
CYMOTIIOiM. 
Cymothoa punctata, sp. n., Ulianin, Mat. Faun. Black Sea, p. 74, Black Sea, 
on Cliipea pojitica (Pnchw.). 
PHYLLOPODA. 
Branchipus. W. J. Schmankiewitsch has observed, near 
Odessa, that B. arietinus is larger and paler in slightly salt water, 
blit smaller and redder in strong salt water. By continued breed- 
ing he found that new generations can live in waters of very dif- 
ferent degrees of saltness (from 3° to 18° of Borne’s scale), in which 
the parents could not live, and that they then exhibited remark- 
able differenees in structure, such as the development of caudal 
lobes, the want or increased number of caudal spines, and even 
the increased number of abdominal segments, so that generations 
raised in water of a less degree of saltness in a remarkable degree 
resembled other distinct species which live in fresh water. Stri- 
king variations have also been observed in the sexual organs — 
females with stout horn-shaped lower antennae, like those of the 
males, and males with deformed sexual organs ; such individuals 
are also found in ponds of which the saltness has been diminished 
by copious rains. He has also observed parthenogcnetic repro- 
duction in the genus, which takes place in every case of un- 
usually increased or diminislied saltncss, producing only females ; 
only at a middle degree of saltncss are males sometimes to be 
found. Trans. 3rd meeting of Russ. nats. at Kiow, and Z. wiss. 
Zool. xxii. pp. 293-295. 
C. Vogt confirms Siebold’s statement that males of Branchipus diaplianus 
and Artemia salina are extremely rare {cf. Zool. Rec. viii. p. 179). Arch. 
Sci. Nat. 1872, p. 30; abstr. Ann. N, II. (4) x. pp. 405 & 406. 
1872. [voL. IX.] 
o 
