ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
721 
and in many points it resembles Gammarus , while the mode of develop- 
ment of its digestive tract is similar to that of Gaprella. The history o*f 
A. picta has already been worked at by Rathke, who does not, however, 
make any mention of its dorsal organ ; on the whole, its history is very 
closely similar to that of S. valida. 
Addendum to Monograph of Caprellidae.* — Dr. P. Mayer has 
published an addendum to his monograph of Mediterranean Caprellidae. 
A large portion consists of systematic work, in which several new genera 
and species are described. In the anatomical and histological portion 
some space is given to the appendages, while the phylogenies of the 
Cyamidse and of the genera and species of the Caprellidae are briefly 
discussed. 
Cladocera of Neighbourhood of Moscow.f — Mr. P. Matile has a 
memoir on the Cladocera found in the neighbourhood of Moscow, in 
which he enumerates seventy-five species, a few of which are new ; this 
is a considerable increase on the forty-three species reported by the 
three naturalists who have before written on this subject. 
New Cypridinidae.l — Dr. G. W. Muller describes some new 
Cypridinidae collected by Hilgendorf on the coast of Japan, and by 
Chierchia on the cruise of the ‘ Vettor Pisani.’ Most of the members 
of this family of Ostracods frequent the sea-bottom at slight depths, 
though at times they may swim on the surface. But a number of species 
of Gypridina , grouped by the author in the subgenus Pyrucypris , are 
markedly pelagic, luminous, and strong in numbers. These surface- 
forms swallow Radiolarians, Infusoria, minute Heteropods, &c., and 
their oesophagus must be very extensile ; those which frequent the 
bottom eat diatoms and small organisms. After describing the shell 
and the appendages, Dr. Muller proceeds to the systematic part of his 
memoir, where he describes one new species of Gypridina , six within his 
new subgenus Pyrocypris, two of Philomedes , four of Asterope. Some of 
these species are brightly phosphorescent, and there is some evidence 
to show that the luminous material is exuded from glands on the 
upper lip. 
Halocypridae.§ — Dr. G. W. Muller describes the Halocypridse of 
Chierchia’s collection. They are pelagic in habit, though Conchcecia 
variabilis extends from the surface to a depth of 2000 fathoms, and they 
are among the swiftest entomostracan swimmers. The very uniform 
shell, the abundant glandular cells usually confined to the shell margin, 
and the appendages are described at length. Four genera are recog- 
nized : — Halocypris Dana (1 sp. n.), Halocypria Claus, Gonchoecia Dana 
(6 sp. n.), and JEuconcJioecia g. n. 
* 4 Fauna u. Flora des Golfes von Neapel,’ xvii., Berlin, 1890, 157 pp. and 7 pis. 
f Bull. Soc. Imp. Nat. Moscow, 1890, pp. 104-69, 3 pis. 
i Zool. Jahrb., v. (1890) pp. 211-52 (3 pis.). § T. c., pp. 253-80 (2 pis.). 
