228 - Miscellaneous. 
We may refer to figs. 1 and 2 for more ample details as to 
the scaling of the head. 
Coloration.—The upper parts exhibit a fine golden-yellow tint ; 
an elongated black spot covers the occiput ; a black streak is con- 
tinued upon the dorsal line from the region of the fore limbs as far 
as the anterior third of the tail ; on both sides the back is covered, 
down to the flanks, with a large-meshed black network, having 
a very pretty effect ; the upper surface of the limbs presents a 
similar pattern. The head and the temples are variegated with 
black ; beneath each eye a great number of small black spots form 
an elongated spot, which is prolonged from the fourth to the last 
of the labials. A black line follows the lateral margin of the 
tail from the base. The lower parts are of a uniform white or 
whitish tint. 
Dimensions.—Total length 112 millims.; head 17, trunk 13, 
tail 57. 
Habitat.—Mossamedes. A single individual. 
We have received from the same locality, through M. d’An- 
chieta, several rare and interesting reptiles, such as— 
Sauria: Chameleo namaquensis (Smith), Homodactylus Bibroni, 
Euprepes Oliviert, E. Merremit, Mochlus afer, Anelytrops elegans. 
Ophidia: Cerastes caudalis, Psammophis, sp.? 
Batrachia: Dactylethra Miillert, Bufo spinosus. 
Lisbon, July 9, 1867. 
MISCELLANEOUS. 
On the Development of the Ctenophora. 
By A. KowaLewskry. 
Tue author has carefully traced the development of the egg in 
various Ctenophora, and has arrived at some very curious results, 
especially with regard to the first phases of evolution. 
In the Eschscholtzie (and the other Ctenophora seem to be in 
the same case) two layers may be distinguished in the vitellus,—the 
external one very thin, formed of true protoplasm, the other central, 
consisting of an emulsion of large fatty drops. Acetic acid produces 
a granular precipitate in the former, but has no action on the 
second. The distinction of these two layers is important, as the 
former alone plays the part of a formative vitellus, the second behaving 
as a vitellus of nutrition. 
The segmentation into two and then into four and eight parts is 
effected in such a manner that each of the spheres of segmentation 
presents the two layers, like the original vitellus. These spheres are 
completely destitute of nuclei. At this period a remarkable pheno- 
menon takes place. In each of the eight spheres of segmentation 
