138 QUARTERLY CHRONICLE. 
Body elongated, tth cent. long, transparent, colourless ; 
ovisac and terminal forks of the tail vermilion; integument 
soft, dorsum arched, trunk compressed; abdomen half the 
length of the entire body, terminating in two long, horizontal, 
stalked, fimbriated spines. Head rounded behind, and above 
having an oval plate, and in the male presenting a frontal 
scute produced into a tubular process. First pair of antennz 
filiform, reaching as far back as the first pair of feet; second 
pair far forwards on the frontal scute, in the male half as 
long as the body, but divided into several segments, and 
terminating in two spines, one of which is very long, slender, ° 
and toothed; in front of the second joint a long cirrhus, and 
on the remainder of the length numerous palpal lobes (Tast- 
lappchen). In the female the antennz are long, lancet- 
shaped, with adpressed hairs (plattbehaart). Simple eyes, 
composed of two trapeziform segments. First pair of maxille 
large, almost angular beneath, bent inwards; the second leaf- 
like, with a slender, angular, internal process supporting a 
seta; third pair rudimentary, rounded, with long sete on the 
outer and anterior sides. Feet nearly all of equal length, with 
large branchial leaflets on the outer side, the upper serrated 
at the border and oval, and the lower digitate, and with an 
upper long, and median short lobe and three small inferior 
setigerous lobules; the inferior terminal lobes of the feet two 
in number, the internal wide and the outer slender. Ab- 
dominal sexual sac of the first and second segments on each 
side with a short cylindrical penis, with a slightly spinous, 
somewhat curved spicule on the mner side. Female with a 
long cylindrical ovisac terminating in an upwardly curved 
spine ; two ovaries on each side, a uterus or egg-receptacle, 
vitellarium with its canal; ripe ova large, brown, mulberry- 
like, with smooth chitinous shell. 
Monatsbericht der Akad. zu Berlin.—< On the Sap-currents 
Rotation and Circulation in the Cells of Plants, with reference 
to the question of Contractility.” By Professor REIcHERT. 
From a translation by Mr. Dallas, in the ‘Annals and Mag. 
Nat. History..—The result of my investigations may be 
summed up in the following paragraphs: 
1. In all vegetable cells with rotating, circulating, or rotato- 
circulating currents, two parts are to be distinguished in the 
contents of the cellulose capsule—namely, the central “ cell- 
juice” or “cell-fluid” situated between the axis and the 
“ mantle-layer’’ (Mantelschicht) diffused between this and 
the cellulose capsule. 
2. The “ cell-fluid”’ is colourless, or coloured as in Trades- - 
cantia virginica, not very tenaciously fluid, and without albu- 
