On the Anatomy and Embryology of the Plialangiidre. 397 



yellow central fascia, irregularly edged on both sides with 

 purplish, more oblique than that in B. crassiconu's, Walk., 

 and much narrower on the inner margin than on the eosta ; 

 space before the hind margin pale clear yellow, with a fine 

 dark line from before tlie apex round the hind margin, beyond 

 which the fringes again are yellow. llind wings with 

 only the costa pale, the rest of the wing being dark fuscous ; 

 fringe 3-ellowisli. Head, face, thorax, and abdomen pinkish 

 cinereous. Underside of abdomen whitish ; pectus ])ale 

 yellow ; palpi pale yellow, unspotted ; tibiai all spotted alter- 

 nately pur})lish and white. 



Expanse of wings 28 millini. 



One female, Port Darwin. 



[To be continued.] 



LX. — On the Anatomy and Embryology of the Phalangiidae. 

 By Victor Faussek *. 



My Russian memoir has just appeared, under the title 

 " Studien iiber die Entwicklungsgeschichte und Anatomic 

 der Afterspiunen (Phalangiidae)" (Arbeit. Petersb. Xaturf. 

 Gesellschatt, Abt. Zoologie, Bd. xxii. Lief. 2 [Arbeit, aus 

 dem zootomisch. Kabinet d. Petersb, Universitiit]), and in 

 order to render my jiaper more readily accessible to readers 

 abroad I oiFer the following resume of the more important 

 results of my investigations, some of which have already 

 been published in two smaller provisional communications f ; 

 I shall at the same time refer to the fisrures which accom- 

 pany my memoir. 



1. My researches were conducted upon the ova of two 

 species of Phalangium — Cerastoma cornutum, L., and Ojnli'o 

 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. cornutum 

 are of a yellowish colour, which is due to a multitude of 

 yellow granules covering tiie chorion ; in the ease of Opilio 

 parietinus the chorion ])ossesses no yellow granules and the 

 ova are pure white. The ova of Cerastoma cornutum^ which 



* Translated from the ' Biologisclies Centralblatt,' xii. Bd. no. 1 (Jan 

 15, 1892), pp. 1-8. 

 t Biol. Centrdbl. viii, 12 (1883); Zool. Auzeiger, no. 353 (1891). 



