54 PBOGRESS OF MICROSCOPICAL SCIENCE. ['^jo^S! jJnSyTim ^ 
numerous carefully drawn sketches of the general structure of these 
molluscoids and describing the development of the statoblast. — See 
Heft IV. 
The Spontaneous Formation of White Blood- Globules (^Leucocytes). — 
M. Onimus gives us an excellent summary of his investigations on 
this point in the ' Journal de 1' Anatomic.' He believes he has proved 
that a perfectly amorphous liquid, like that formed under the ampulla 
of the epidermis, raised by a blister, is capable of developing cor- 
puscles identical with those of the chyle and blood. In his first 
experiments the liquid from a blister, previously filtered, was injected 
under the skin of a warm-blooded animal. In a short time the 
liquid was found full of leucocytes. In the present paper M. Ominus 
gives full details of more elaborate experiments, and combats the 
arguments urged against him. He states that many of the inquiries 
have been conducted under the eyes of MM. Legros and Eobin, who 
have verified them ; and he quotes some observations of M. Bernard 
which endorse his views. In his latest experiments he separated the 
liquid to be experimented on from the blood by means of parchment 
or membrane, and he thinks that the white globules could not have 
made their way through this. There is, however, reason to believe 
from other observations that this passage is at least within the range 
of possibility. — See Nos. for November and December. 
A New Species of Sarcoptidce, of the Genus Glyciphagus^ is recorded 
in the above-mentioned journal, by M. Eobin. This he has called G. 
EericiuSj and he states that its character leads to a revision of the 
diagnostic features of the genus. It lives on the liquid which bathes 
the peculiar ulcerous growth of trees, such for instance as the elm 
(Ulmus campestris). The locomotion is slower than that of other 
species, and when walking it bends the rostrum downwards nearly 
at a right angle with the axis of the body. The movements of the 
males are more active than those of females, or nymphs. They 
multiply with great rapidity. The ova are deposited before seg- 
mentation has commenced. M. Eobin describes minutely the anatomy 
of the skeleton, the integument, its appendages, the anus, and the 
reproductive system. Several plates accompany the paper, and dis- 
play illustrations of the perfect animal and of the structure of the 
different systems. — Ibid. 
The Spiral Lamina of the Cochlea of Man and Mammalia. — This is a 
long and very valuable memoir in. the above journal, from the pen of 
M. B. Lcewenberg. It extends over nearly thirty pages, and is illus- 
trated by two handsome plates. 
The Brain in Edentala is an excellent anatomical memoir in the 
same journal. It is by M. Ponchet, and is to be continued. 
The Functions of the Boots of Plants. The Annales des Sciences 
Naturelles (Botanical Section), t. IX., contains the continuation of 
M. Corenwinder's memoir on this subject, M. Corenwinder in the 
main concludes that the functions of the root have been very fairly 
expressed by Baron Liebig in his ' Natural Laws of Husbandry.' He 
