CRUSTACEA. 
523 
Ca'nvpeco'peM hirsuta (Montagu) and cranchii (Leach) British. Sp. Bate 
and Westwood, /. c. pp. 433-437. 
CYxMOTHOIDA5. 
Schkedte’s paper on the mouth of the sucking Crustacea (see Zool. 
Record, yoI. iii. p. 236) is translated in Ann. & Mag. Nat. Hist. i. pp. 1-25, 
with pi. 1. 
Serolis fahricii (Leach).' Plentiful about Sandy Point, in Magellan Straits. 
It crawls very sluggishly, hut paddles rapidly on its back along the surface of 
shallow pools. Rob. Cunningham, Ann. & Mag. Nat. Hist. i. p. 443. 
yEga spongiophilay sp. n., Semper, Wiogm. Arch. 1807, p. 87 ; Ann. & 
Mag. Nat. Hist. ii. 1868, p. 29. Lives in Euplectella aspergillum. 
JEga {Conilera) interrupta, sp. n., Borneo, in freshwater, on Notopterus 
hypselonotus (Bleeker). The fifth, sixth, and seventh segments of the thorax 
swollen and weakened. Martens, Wiegm. Arch, xxxiv. p. 58, pi. 1. fig. 3. 
Cirolana truncatay sp. n., Norman, Ann. & Mag. Nat. Hist. ii. p. 421, pi. 23. 
figs. 12, 13, Shetland, 40-60 fathoms, in mud. 
Anilocra mediterranea (Leach), British, found on small fish in rock-pools 
at Herm. Norman, 1. c. p. 422, pi. 23. figs. 14, 15. 
ENTOMOSTRACA. 
Cladocera. 
P. E. Muller has given, in the two memoirs mentioned above 
(p. 5 12) , a monograph of the Danish Cladocera. He begins with 
a list of papers on this order of Crustacea, and with general mor- 
phologieal and physiological remarks on the subjeet ; then he 
proceeds to a detailed account of the structure of the ovaries and 
two kinds of eggs of certain species, viz. Holopedium gibberum 
(Zadd.), Daphnia galeata (Sars), Leptodora hyalina (Lillj.), and 
of some others. Both papers are illustrated by fine plates, drawn 
by the author himself ; and although written in the Danish lan- 
guage, they are rendered more intelligible for foreign readers by 
a short Latin recapitulation of the chief results, and by a Latin 
explanation of the plates. 
With regard to the summer- and winter-eggs, the author states 
that both (although the first are produced without feeundation) 
are essentially similar in their histological genesis and develop- 
inent,both being formed in the same ovaria, from small vesieles, in 
a homogeneous mass. The development of the vitellus, the disap- 
pearance of the germinative vesicle, and the resorpUon of the 
vitelligene cells are the same, and occur in the same order. The 
first difference is to be observed in the composition of the nutri- 
tive part of the yolk, a drop of orange-coloured oil being seen in 
the vitellus of the summer-eggs of some Daphniidee (not Poly- 
phemid(B)y but never in their winter-eggs, and the yolk of the 
winter-eggs is usually larger and darker than that of the summer- 
eggs. These differences, and others occurring in the Polyphe- 
