QUARTERLY CHRONICLE OF MICROSCOPICAL 
SCIENCE. 
GERMANY.—Kolliker'’s und Siebold’s Zeitschrift. Fourth 
Part, 1865.—< New Researches on the Reproduction of the 
Viviparous Dipterous Larve,’ by M. Hanin, Prosector in the 
University of Charkow. The author of this paper, which 
deals with a most interesting subject, gives the following con- 
slusions to be drawn from his observations:—1. That the 
development in these animals does not result from the corpus 
adiposum. 2, That the young larve originate from eggs, 
which develop in an ovary. 3. That the process of egg 
formation presents some resemblance to the formation of the 
egg among some mature Diptera (Musca vomitoria, Sarco- 
phaga carnaria). The egg originates from more cells, and is 
further distinguished from the egg of mature insects by the 
deficiency of the germinal vesicle. 4. That the egg, before it 
becomes fertilised, commences to develop embryos, and that the 
commencement of the development of the embryo has some 
likeness to the development of the same among some perfect 
Diptera. The development of the embryo proceeds from one 
part of the primitive embryonal mass. And finally, 5. That in 
consequence of what has been said, the phenomenon of the 
increase of the larve, instead of being an enigma, as it appears 
according to Wagner’s interpretation, receives a very natural 
explanation. 
“ Contributions to a nearer knowledge of the Young Forms 
of Cypris ovum” is the title of a paper by Dr. C. Claus. His 
results are as follows :—1. The Ostracoda pass through a kind 
of metamorphosis, in so far as in the various steps of their 
free state of existence they possess a varying form of 
shell, and first acquire the full number of their limbs by 
gradual development. 2. The youngest stages are shells 
bearing Nauplius-forms, with three pairs of limbs for move- 
ment, namely, the two antennz and the mandibular “‘append- 
ages. 3. There are in Cypris ovum nine successive stages, 
which are distinguishable from one another ; of these the last 
VOL. VI.—NEW SER. D 
