42 QUARTERLY CHRONICLE. 
dealing with micro-zoology, which will, therefore, interest our 
readers :—Professor Grube, “ On the Genera Estheria and 
Limnadia, and on a New Apus.’ Dr. J. E. Schédler, “ Di- 
agnoses of some Daphnide.” Professor Fritz Miiller, “ On 
the Cumaceans.” 'This appears to be a very valuable contri- 
bution to our knowledge of these remarkable little Crusta- 
ceans, which have been already written of by Kroyer, Van 
Beneden, Milne-Edwards, Goodsir, Spence Bate, and others. 
The two most interesting papers, however, are by Profes- 
sors Leuckart and Mecznikoff, the one “ On the a-sexual 
Reproduction of the Larve of Cecidomyia,’ and the other 
on the development of the same larva. The results of 
Herr Hanin’s paper on the same subject we have already 
given above, and intend to return to Professor Leuckart’s 
paper hereafter. 
A short but interesting communication from Professor 
Mayer, ‘‘ On the Chorda Dorsalis in Fishes,” completes the 
list of microscopical papers in this journal. 
Hedwigia——We have two numbers (6 and 7, of 1865) of 
this spirited little journal before us, which is devoted to eryp- 
togamic botany, and is printed in the German characters. 
No. 6 contains a paper by Dr. Ferdinand Cohn, of Breslau, 
“On Two New Beggiatoe.” The first of these is Beggiatoa 
(Oscillaria) mirabilis, the second B. pellucida. Dr. Cohn 
also describes a variety B. alba, var. marina. The species 
are carefully drawn in a plate accompanying. 
In No. 7 Dr. Cohn describes a form of Chlamydomonas, 
C. marina, which he obtained, as also his Beggiatoe, from his 
marine aquarium. The Chlamydomonas, which is of very © 
simple structure, and colours water green by its presence, is 
illustrated in a woodcut. The same number contains a re- 
view of Mr. Mordecai Cooke’s little book, “ On Rust, Smut, 
Mildew, and Mould.” 
FRANCE.—Comptes Rendus.—A communication from Pro- 
fessor Kuhne, “ On the Nervous Lamine (pldques) of Motor 
Fibres,” occurs in the ‘ Proceedings of the French Academy’ of 
the 16th of October. The nervous laminz, which the author 
described as the continuation of the cylinder axis in the 
nervous cones of the muscles, has been contested by some 
authors. Thus, M. Rouget (an abstract of whose researches 
will be found in our Chronicle of last April) believes that it 
is produced only by a series of fissures, of vacuoles, and 
coagulations, which form after death. He rests the prin- 
cipal proof of his explanation on the fact that some parts of 
the lamina offer no continuity with the nervous fibre. Kuhne 
found this also himself, but believes that all the parts of the la- 
