'292 Archiv fur Anatomie, Physiologie, $*c. 



small and very numerous in the Ph. alter tii folium, but very large, and conse- 

 quently few in number, in the Archidium Animadvcrsiones botanica non- 



nullce novorumque generum et specierum diagnoses, auct. F. E. L. Fischer et C 



A. Meyer Septieme Notice sur les plantes rares du Jardin de Geneva, par 



MM. A. Pyr, et Alph. De Candolle. 



Archiv fur Anatomie, Physiologie, und Wissenschqftliche Medicin, 

 SfC. Von Dr Johannes Muller. G. Eichler. Berlin, Heft, 

 ii. 1836. 8vo. (Continued from p. 196.) 



This number contains an article on the Anatomy of Fishes by Henry Rathke. 

 During a scientific tour in the southern provinces of the Russian empire, per- 

 formed in 1833, the author had an opportunity of making observations on the 

 internal structure of thirty-six species of fish, which he procured along the shores 

 of the Black Sea. He has given a brief but very accurate account of the gene- 

 rative organs of several of these species, and he intends in four or five subse- 

 quent numbers, to detail in order the anatomy of the urinary vessels, the swim- 

 ming bladder and alimentary canal, and the circulating system. These memoirs 

 are intended as a brief continuation of the description of the same organs in the 

 fishes of the north of Germany, already published by the author, partly in his Con- 

 tributions to the History of the Animal Kingdom, ( Part 2) and partly in Meckel's 

 Archives for 1826. There is also an elaborate paper by the same author on the 

 generation of the Decapods, founded principally on an examination of fourteen 

 species inhabiting the Black Sea, wdiich he procured at the same time as the fishes 

 before-mentioned. He also announces the publication, in the course of a few 



weeks, of a work in which the subject is treated more at large —A paper by Dr 



Pockels of Brunswick on the gestation of the Roe (Cervus Capreolus) accom- 

 panied by an engraving, gives the result of a very accurate examination of the 

 uterus from the time of impregnation till the foetus had attained the length 

 of from three to three and a-half inches. He proves by this investigation, that, 

 contrary to the received opinion, the ovum remains dormant in the ovarium dur- 

 ing a period of five months. The rutting season continues from the end of 

 July till the end of August, but the developement of the ova does not commence 

 till December, by the end of January the embryo had attained the length above 

 specified -The number concludes with two letters from Mauro Rusconi, (ad- 

 dressed to Professor E. H. Weber) in answer to the critique of M. von Baer, upon 

 his history ofthe developement ofthe spawn of frogs. These letters are illustrated 

 by two plates showing the successive changes which the spawn undergoes. The 

 points which Rusconi endeavours to establish are briefly these : That the skin and 

 the slimy matter which surrounds the egg, do not contribute towards its develope- 

 ment ; that the egg of the frog differs from that of birds, inasmuch as the cicatricula 

 is wanting, from which point the vivifying process commences. The punctum 

 saliens in the egg of the frog is the whole yolk, which by degrees changes into 

 the larva. This change is hastened or retarded, according to the temperature of 

 the water in which the egg is deposited. That the semifluid material of the 

 yolk changes into a bag of little globules, or elementary molecules, before the 

 organization begins. That the skin is the first part of the larva that becomes 

 organized ; then follow in succession the spinal chord, the brain, the aorta, the 

 muscles ofthe back, the peritoneum, theheart, the liver, and lastly, the alimen- 

 tary canal. 



