24 Crust. 
CRUSTACEA. 
Neither are they indelible, as, after some moults, Paguri freed from 
parasites re-acquire male characteristics. Giahd (1, 2). 
Deep-sea Galatheids produce eggs, few in number and remarkably 
large. This probably indicates that deep-sea enemies are fewer. Id. ibid. 
Alpheus prcecox acquires adult characteristics twenty-four hours after 
hatching. A. heterochelia is the only other known species which presents 
abbreviated metamorphosis. The habits and colour-variation of Alpheus 
are also treated of. Herrick. 
Kingsley (2) deals with the development of Crangon. 
On early stages of the development of Lepas, see Nussbaum. 
Pereyaslawzewa, in treating of the development of Amphipoda , 
commences with that of Gammarus pcecilurus. 
Rossijskaja describes the development of Amphipoda generally, and 
of Orchestia littorea in particular. 
Rosseter writes on the male generative organs of Cypris . 
Miscellaneous. 
Grapsicepon edioardsi is the first example of a Bopyrid being found 
parasitic on a Crustacean living in other than quiet waters. Giard & 
Bonnier (1). 
The 1 Challenger ’ expedition has largely increased the number of 
known Munida. Henderson, p. 214. 
Abnormality in Platycarcinus pagurus ; Fischer. 
Hilgendorf treats of the orbit of Gecarcinus. 
Latreillopsis, a new genus of the Anomura y is of special interest as 
connecting Homola with Latreillia. Henderson, p, 212. 
Kcehler, in a preliminary note, gives a fairly complete summary of 
his researches on the structure of the stalk of Cirripedes. IIo promises 
a more extended work, with plates. 
Rosenstadt gives an account of the anatomy of Asellus aquations and 
other Isopoda. His conclusions are chiefly corroborative of Scholl and 
Brandt. 
Semenovsky describes the anatomy of a fresh-water Gammarid 
(Russian). 
Vascular System . • 
The blood-containing body cavity of Arthropoda (and Mollusca ) is a 
distended and irregularly swollen vascular system. It may be called 
“ heemocoele ” instead of “ coelom.” Each pair of valvular cardiac ostia 
represents a pair of ancestral tubular veins coming from the gills. 4 he 
ccelpin is represented by the generative glands and tubes, aud the excre- 
tory gjands and vesicles. There are remnants of coelom in Limulus , in 
the interr vascular spaces into which opens the nephridjum which be- 
comes the coxal gland. The tubular generative glands are perigonadial 
coelom communicating with the exterior by ipodified nephrjdia. Lan- 
kester. 
Jn the Crayfish, the Crab, aud the Hermit-Crab, the blood-fluid, in 
