On the Anatomy and Embryology of the Phalangiide. 397 
yellow central fascia, irregularly edged on both sides with 
purplish, more oblique than that in B. crassicornis, Walk., 
and much narrower on the inner margin than on the costa ; 
space before the hind margin pale clear yellow, with a fine 
dark line from before the apex round the hind margin, beyond 
which the fringes again are yellow. Hind wings with 
only the costa pale, the rest of the wing being dark fuscous ; 
fringe yellowish. Head, face, thorax, and abdomen pinkish 
cinereous. Underside of abdomen whitish; pectus pale 
yellow ; palpi pale yellow, unspotted ; tibia: all spotted alter- 
nately purplish and white. 
Expanse of wings 28 millim. 
One female, Port Darwin. 
[To be continued. ] 
LX.—On the Anatomy and Embryology of the Phalangiide. 
By Victor FAUSsEK *. 
My Russian memoir has just appeared, under the title 
“Studien iiber die Entwicklungsgeschichte und Anatomie 
der Afterspinnen (Phalangiide)” (Arbeit. Petersb. Naturf, 
Gesellschaft, Abt. Zoologie, Bd. xxii. Lief. 2 [Arbeit. aus 
dem zootomisch. Kabinet d. Petersb. Universitiit]), and in 
order to render my paper more readily accessible to readers 
abroad I offer the following résumé of the more important 
results of my investigations, some of which have already 
been published in two smaller provisional communications T ; 
I shall at the same time refer to the figures which accom- 
pany my memoir. 
1. My researches were conducted upon the ova of two 
species of Phalangium—Cerastoma cornutum, L., and Opilio 
parietinus, Herbst. The ova of these differ from one another 
in the structure of the chorion and in certain conditions 
necessary for their development. The ova of C. cornutwm 
are of a yellowish colour, which is due to a multitude of 
yellow granules covering the chorion ; in the case of Opilio 
parietinus the chorion possesses no yellow granules and the 
ova are pure white. The ova of Cerastoma cornutum, which 
* Translated from the ‘ Biologisches Centralblatt,’ xii. Bd. no. 1 (Jan, 
15, 1892), pp. 1-8. 
+ Biol. Centralbl. viii, 12 (1888); Zool, Anzeiger, no, 353 (1891), 
