Bibliographical Notices. 293 



(from MuUer's ' Archives *). — M. de Quatrefages on the Synhydra 

 parasites, a new genus of Polypes near Hydra (with a fine plate) ; an 

 interesting memoir on a very anomalous animal. The reproduction 

 of hydroid polypes by bulbils, which the author supposes he is the 

 first to discover, has long been known to British zoophytologists, and 

 is described in the writings of Johnston and others. Several points 

 in this, as well as former excellent papers of M. de Quatrefages, 

 show that he is unacquainted with much that has been done on this 

 side of the Channel. 



Botany. — Mr. Robert Brown on the plurality and development of 

 Embryos in the Seeds of Coniferce will appear in the next number 

 of the ' Annals.' — M. Gaudichaud's reply to M. Mirbel. — Dr. Le- 

 veille on the genus Sclerotium. The genus Sclerotium, constituted 

 by Tode in 1790, has been made a receptacle for all kinds of ano- 

 malous fungoid productions, many of them only states of diseased 

 vegetable tissue. M. Leveille in this memoir investigates the nature 

 of these problematical vegetables with care. He regards them with 

 Martins and Corda as asporous, and as only forms of undeveloped 

 fungi, in fact mycelia. Two plates accompany the paper. — Count 

 Jaubert and M. Spach, Conspectus subgeneris Armeriastrum. Twenty 

 species of Statice of this subgenus, mostly from Persia and Western 

 Asia, are recorded. 



Nov. — Zoology. — M. F. Dujardin on the habits of a captive Dor- 

 mouse. — M. Kcelliker's inaugural thesis on the Genesis of Insects 

 (with three plates). A portion of this valuable memoir is devoted to 

 a comparison of the evolution of the Articulata with that of the Ver- 

 tebrata. The concluding sentence of this paper embodies an import- 

 ant proposition : " Articulatum nobis est animal vertebratorum em- 

 bryoni simile, in quo et laminae dorsales non coaluerunt, et systema 

 ossium cum membris lateralibus primis vestigiis tantum formatum 

 est." — M. Leon Dufour on the metamorphoses of Eledona agaricicola 

 (with a plate). A notice of the interesting habits of the fungivorous 

 larva of this beetle is given among the miscellaneous articles of the 

 present number of this journal. — M. Leon Dufour on the meta- 

 morphoses of Diaperis Boleti. The larva of this insect has the same 

 habit with the last. — Second part of Dr. Chossat's researches on 

 Lianition. 



Botany. — MM. Mirbel and Spach on the Embryogeny of Pinus La- 

 ricio and sylvestris, of Thuya occidentalis and orientalis, and oiTaxus 

 baccata (with plates). — Mr. Webb on the genus Retama. Eight spe- 

 cies are described. — MM. Corson and Germain on Filago and Logfia 

 (with a plate). A new species of Filago, nearly allied to F. germa- 

 nica, is described in this paper under the name of Filago Jussieei. It 

 is said to be distinguishable at first sight from the former species, by 

 the foliaceous involucre of the glomerules exceeding the capituli; 

 by the larger size of the capituli, which are fewer in each glomerule 

 (being eight to fifteen, rarely twenty, in Filago Jussicei, and twenty 

 to twenty-five in the common species), and by their not being buried 

 in a thick tomentum. The new species flowers later (in November) 

 than F. germanica. It appears to be common in France, and occurs 



