Annales des Sciences Naturelles. 
animals described by Captain J. C. Ross as natives of Boothia. 3. George Col- 
gate on the Husk or Hoore in Cattle 4. A. H. Haliday, M. A., An Epitome 
of the British genera in the order Thysanoptera, with indications of a few spe- 
cies. 5. J. V. Thompson, F. L. S. Deputy- Inspector of Hospitals. Natural 
History and Metamorphosis of an Anomalous Crustaceous parasite of Carcinus 
mcenas, the Sacculina carcini. An interesting notice of an extraordinary para- 
sitic animal, apparently " less perfect and more simple in its last stage than in 
that of its larva :" it is desirable, however, that the intermediate stages of the sup . 
posed larva should be more accurately traced 6. Extracts of letters from C. 
Darwin, Esq. to Professor Henslow. From these extracts, much may be expect- 
ed from the assiduity of Mr Darwin. 7. Notes on various insects by lonicus. 
8. Francis Walker, Monographia Chalcididum, (continued from page 206.) 
9. G. R. Waterhouse, Curator to the Museum of the Royal Institution, Liver- 
pool, A few observations on the habits of some species of Bees 10. Ed- 
ward Newman, Entomological Notes, (continued from Vol. ii. p. 516.) 11. 
Notes on the Cheese and Bacon-hoppers, and the Cheese Mite 12. List of 
Entomological Works. 13. Varieties. 
TRANSACTIONS AND PERIODICALS Foreign. 
Annales des Sciences Naturelles. Zoologie, MM. AUDOUIN et MILNE- 
EDWARDS. Botanique, MM. AD. BRONGNIART et GUILLEMIN. 
(From page 102.) Crochard and Co. Paris, Fevrier 1836. 
1. Zoology. 
FLOURENS' Recherches sur les communications vasculaires entre la mere et le 
foetus. M. Flourens' experiments appear to prove, that there exists a vascular 
communication between the foetus and the mother, and e contra a like communi- 
cation between the mother and the foetus, in all animals which have a single pla- 
centa ; while in animals, such as the sow, which have several placentae, there is 
no vascular communication, and the connection between the mother and foetus 
is one merely of contact. His experiments on ruminating animals,' which have 
a peculiar confirmation of the placenta, were less decisive, but an attentive exa- 
mination convinced him, that they were in this respect like the Pachydermata, 
' or multi-placentular animals. F. G. PICTET, Memoire sur le genre Sialis de 
Latreille, et Considerations sur la classification de fordre des Neuropteres, an 
interesting essay. The following is an outline of M. Pictet's classification of 
the Neuroptera. 

2 -i 
{* N. a demi-metamorphoses. 
5 Termitines propr ........ Termes. 
I Psocides ................... Psoques. 
l Perles. 
PERLIDES. 
" \ Nemoures. 
( Ephemerides ............. Epheme'res. 
SUBULICORNES. \ ( Libellules. 
( Libellulines ........... J #!shnes. 
( Agrions. 
NO. II. 
