ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
33 
Nervous System of Mecopo&inse.* — M. L. Bordas lias made a study 
of the stomatogastric nervous system of this tribe of Orthoptera. He 
has had the advantage of examining a large species — Platyphjllum 
giganteum. The stomatogastric system of this species consists of a frontal 
ganglion, a subcerebral ganglion, a pair of latero-oesophageal or intes- 
tinal ganglia. The large number of centres and the numerous branches 
which are given off from them, indicate clearly enough that this system 
must play a large part in the accomplishment of the digestive functions, 
and especially of those movements which are necessary for the complete 
trituration of the food. The author gives a sufficiently detailed account 
cof the facts of the anatomy of this species. 
£. Myriopoda. 
Notes on Lysiopetalidse/j’ — Dr. C. Yerhoeff describes Lysiopetalum 
lendenfeldi, a new species from Bosnia. Among his many detailed 
results, we note that the copulatory apparatus of Lysiopetalidae is formed 
from a single pair of segmental appendages, that the parts previously 
called Vorderarme are differentiations of the coxal parts, and that the 
Lysiopetalid® are, as regards their copulatory organs, far removed from 
lulidae, but near Polydesmidae. 
H. Arachnida. n 
Dermatobia noxialis.f — Dr. B. Blanchard has published some new 
'observations on the larvae of this creature. Dermatobia noxialis is dis- 
tributed throughout the whole of intertropical America, but may extend 
north and south beyond the tropics. Notwithstanding the many obser- 
vations which have been made in the most varied countries and on the 
most diverse animals, and, notwithstanding the variety of names under 
which it is known, the cuticolar larvae of the genus Dermatobia , observed 
until now in man and domestic animals, belong to one species only — 
Dermatobia noxialis ; the two larval forms which have such distinctive 
characters are only two successive stages in the development of one 
species, and are separated the one from the other by an ecdysis, which 
ttakes place in the tumour where the larvae is developed. Another species 
of Dermatobia is found in South America, and, although apparently 
widely distributed, its larva is not yet known. It does not appear to 
attack either man or domestic animals. 
e. Crustacea. 
Byes of Decapods.§ — Herr B. Rosenstadt has studied the eyes of 
numerous Decapods, especially as regards (1) the pigmentation and its 
displacement, and (2) the relation of the crystalline cones and the optic 
rods (rhabdoms) to one another and to their matrix cells. Species of 
Lucifer , Sergestes , Virbius, Palsemon, Astacus , Pagurus, Ac. were included 
in his investigations. 
In each ommatidium there are (a) four iris-pigment-cells beside the 
* Comptes Rendus, cxxiii. (1896) pp. 562-4. 
t Zool. Anzeig., xix. (1896) pp. 465-77 (4 figs.). 
X Bull. Soc. Centr. Med. Vete'rinaire, 1896, 14 pp. and 3 figs, (separate copy). 
§ Arch. f. Mikr. Anat., xlvii. (189G) pp. 748-70 (2 pis.). 
1897 
D 
