188 PROGRESS OF MICROSCOPICAL SCIENCE. [ JoumJ iwlrXiS^ 
which contains no sugar. He has figured the species found by him, 
which is really only Mycoderma vini. The objection to his experi- 
ment is that the time during which the urine had stood after discharge 
from the bladder is not stated. — Vide Journal de VAnatomie, No. I., 
1869. 
The Fecundation of Cephalopods. — This process has been very care- 
fully studied, and is described in a memoir (Linnean Society of 
Bordeaux, 1868) by M. A. Lafont. The author states that of thirty 
specimens of OmmastrepJies sagittatiis examined by him, four females 
bore at the base of their branchicTe a packet of spermatophores, divided 
into two bundles, fixed in the internal wall of the sac by an oval 
placenta, and so placed as to be in contact with the nidamentary 
glands, at the level of the opening of the oviduct. A fifth female 
also bore spermatophores, but the bundle was fixed upon the nida- 
mentary glands, and a little above the opening of the oviduct. The 
spermatophores were united by a sort of gelatinous matter, which 
bound them together. In all the males, he found at the base of the 
penis-orifice a large pouch filled with spermatophores, united by their 
bases into bundles placed in stages one over the other. At the side of 
this pouch, and in communication with it, was found a sort of convo- 
luted gland communicating with the testes. He found in the upper 
part of this organ, and in the canal of communication with the penis- 
pouch, very long spermatophores, free and in course of formation, 
while the lower part (like the deferent canal) contains only free sper- 
matozoa. 
The Nerves of the Bladder and Sphincter Ani. — This very important 
point in human histology has a paper devoted to it by M. Masius. 
Vide Bull, de VAcad. Boyale de Belgique, 2® serie, t. XXV., No. 5. 
The Anatomy of the Crayfish. — In the third part of his fine memoir 
on the anatomy of this crustacean, M. Victor Lemoine deals with the 
glandular system generally, — the cutaneous pigment, the blood cor- 
puscles, the intestinal glands, hepatic gland, testicle, and the " green 
gland." This last structure has puzzled most anatomists, but the 
author has given a very elaborate description of it. — See Annales des 
Sciences Naturelles, t. X., 1868. 
TJie Anatomy of the Trichodactylus.—'M.. A. L. Donnadieu has an 
article on this genus of the Acari in the number of the '^Annales' referred 
to above. The author gives a detailed account of the external anatomy 
of the genus, and supplies some excellent illustrations. He thinks 
that Trichodactylus, Sarcoptes, and Psoroptes, approach each other by 
common characters, which place them in a distinct group from the 
Tyroglyphce, for these latter have four pairs of limbs, terminated by 
hooks or suckers, while the former have one or both pairs of posterior 
feet terminated by one or more long hairs. 
A New Crustacean of the Genus Limnoria has been described by 
M. Hesse, who calls it Limnoria xylophaga. The author describes its 
zoological characters and its anatomical structure very minutely, 
giving several drawings of them. He states that the habits of the 
