MORPHOLOGY, PHYSIOLOGY, CLASSIFICATION. Gmst. 21 
case with the male, which more approaches the semi- parasitic form of 
Notodelphys. 
Canu (2) briefly discusses the stages of the development of the Noto- 
delphydcc and the Enterocolidce parasitic on Ascidians. The female appa- 
ratus of the Malacostraca is normally double, though fusion has taken 
place in most of the Decapoda. Of this gropp the Peneidce are the most 
primitive. Among the Brachyura vagina and receptaculum seminis are 
present, correlated with an intromittent organ iu the male. 
The female organs of various types are described in detail. Canu (1). 
IV.— PHYSIOLOGY. 
Blanchard (1) has investigated the colouring matter of the bright red 
Diaptomus bacillifer. It was obtained iu the form of a powder which, on 
exposure to air, gradually faded to a brick red, then to yellow, and finally 
to white, even when kept in the dark. Its behaviour under reagents 
strongly resembled that of Carotine. 
For the occurrence of cellulose in Arthropoda , see Ambronn (1). 
Rutherford discusses the microscopical appearances of the striped 
muscle of the crab and lobster. He maintains, in opposition to Melland 
and Gehuchten, that the sarcous matter essentially consists of contractile 
fibrils, with an interstitial substance between them. The protoplasm 
of the fibrils appears homogeneous, but it really forms a network 
with fluid in its interstices. Of the alternate segments of the fibrils, 
“ Bowman’s elements ” are the longest and the only really con- 
tractile. Their appearance and behaviour during contraction are 
minutely described. 
The metallic brilliancy of the Sapphirinidai is due to interference 
resulting from their films. The colours are not those of a grating. 
Beneath the chitinous investment there is a layer of crystals, which 
probably increase the intensity of the colours by furnishing a strongly 
reflecting surface. Ambronn (2). 
V.— CLASSIFICATION. 
Hansen discusses the characteristics of the Cirolana-Cymothoa group, 
which he divides, chiefly on the basis of their mouth structure, into the 
six following families : Cirolanidce, Corallanidai. Alcironidm , Bary- 
brotidoj, AEgidcc, and Cymothoidcc. The characteristics of each family 
are briefly given, and the Cymothoidce are then dealt with in detail. 
Bovallius (1) publishes a monograph on the Oxycephalids. A his- 
torical introduction, with a useful bibliography, is followed by a discussion 
of the systematic position of the group. On the basis of the shape, point 
of fixture, and flagellum of the first pair of antennae, he divides the 
Ilyperidca into — I, Rzcticorma ; n, Filicornia ; III, Curvicornia. The last 
