11 Cmst, 
CRUSTACEA. 
when they are 25 millim. long. Zool. Anz. iii. pp. 152-157 ; some addi- 
tions, ihid. p. 233 ; abstract in J. R. Micr. Soc. iii. p. 630. . 
W. K. Brooks has observed the embryology and metamorphoses of 
Leucifer^ and recapitulates it as follows : — The egg undergoes total 
regular segmentation, and the lines of division extend to its centre, 
where a segmentation cavity is formed. There is an invaginate Gas- 
trula stage. The larva leaves the egg as a Nauplius. There is a Protozoea- 
stage, but no Elaphocharis-stage and no Acanthosoma-stage; the Protozoea 
changing into a Schizopod which has the same general form as the adult 
Leucifer. The' fifth thoracic segment is entirely wanting in all stages of 
development ; there is at no time any trace of it or of its appendages. 
Zool. Anz. iii. pp. 563- 567 ; abstract in J. R. Micr. Soc. (2) i. p. 42. 
Geographical Distribution. 
1 . Terrestrial and Freshwater Crustacea. 
F. Muller states the occurrence of an Entomostracon, Elpidium 
hromeliarum, fam. Cytheridce, in the tops of trees in Brazil; Kosmos, 
vii. pp. 386-388, with woodcut ; abstract in Nature, xxii. pp. 55 & 56, see 
special part. 
List of 14 species of Cladocera, 1 Ostracode and 11 Copepods found in 
lakes of Lapland by P. Trybom, in the Catalogue of the Swedish section 
of the International Exhibition of Fishery at Berlin, 1880, pp. 7-9. 
Three Phyllopods from Finland enumerated by J. Sahlberg, Not. 
Fenn. xiv. p. 317. 
List of 41 fresh and brackish water Ostracoda found in Scotland, 
chiefly Clydesdale and the western district, by D. Robertson, with 
special hints for collecting them. Cypris salina, Cypridopsis aculeata^ 
and Cytheridia torosa belong exclusively to the brackish water ; Cypris 
incongrua and Cypridopsis obesa as well in brackish as fresh water. P. 
N. H. Soc. Glasg. iv. ; abstract concerning the mode of collecting in 
J. R. Micr. Soc. iii. pp. 788 & 789. 
27 species of free freshwater Copepods, viz., 21 species of Cyclops^ 3 of 
Canthocamptus, 2 of Diaptomus^ and 1 TemorUy observed near Bremen, 
Northern Germany, and described, some figured, by H. Rehberg, Abh. 
Yer. Brem. vi. pp. 533-554, pi. vi. 
Observations on the Crustacea in the depths of several lakes of Switzer- 
land, by Asper, in the Catalogue of the Swiss section of the International 
Exhibition of Fishery at Berlin, 1880, pp. 131-140, & Zool. Anz. iii. 
pp. 132-134 & 200-206. Observations of those in 21 lakes of Italy, by 
Pavesi Zool. [Rec. xvi. Crust, p. 9], abstracted in Nature, xxi. p. 525, & 
J. R. Micr. Soc. iii. p. 413. 
Russian Armenia, Lake Tschaldyr-gol. Asellus sp., Gammarus sp., 
Daphnia hyalina, Leptodora hyalinay and Bythotrephes longimanus, near 
the surface at noon ; A. Brandt, Zool. Anz. iii. p. 114. 
Lake of Tiberias. A small shrimp and Telphusa fluviatilis ; Lortet, 
C. R. xci. p. 500. 
North America. Apus found only in the Central provinces, not in 
