Bibliographical Notices. 433 



furthest to 1|"'. Although Vogt describes this annehde as 

 new, it appears to be identical with Ch(Etogaster, Von Baer 

 (Beitrage zur Kentniss der niederen Thiere, tab. 2.). Von 

 Baer also found his Cluetogaster parasitic on freshwater mol- 

 lusca ; not on Ancyhis it is true, but on Limnceus, Planorbls, 

 and Physa. In size, colour and form it agrees perfectly Avith the 

 Matzia, and from the description and figure there cannot be 

 the slightest doubt as to the identity of both animals. I have 

 also found in the neighbourhood of Berlin, in the mantle- 

 cavity of young specimens of Planorbis communis, an annelide 

 which agrees exactly with Vogt's representation of the Matzia 

 hetero dactyl a. The latter name must be abandoned, and that 

 of ChcEtogaster, being the oldest, adopted. 



With respect to the more accurate relations of affinity of 

 this genus, the spiny feet affixed to the flesh-hooks, and the 

 mode of propagation by means of gemmation and division, 

 connect it with the Naiades, from which however it differs in 

 the absence of eyes. It is most nearly allied to Acleosoma and 

 Pristinuj Ehrenb. (Symbol. Phys. Evert.). 



BIBLIOGRAPHICAL NOTICES. 



Annales des Sciences NatureUes. 



Feb. 1843. — Zoology. — The remainder of M. Joly's very valuable 

 paper on Caridina Dcsmurestii. Among the results of his research 

 are the following important conclusions : the Caridina quits the 

 t^g under a different form from that wliich it presents when adult, 

 wanting many organs which afterwards are fully developed. The 

 changes which it undergoes are true metamorphoses, much more com- 

 plete metamorphoses than those presented by Orthopterous, Hemi- 

 pterous, and some Neuropterous insects. A comparison of M. Joly's 

 observations with those of J. V. Thompson and Capt. Du Cane leads 

 him to conclude, that almost all, if not all, Decapodous Crustacea 

 exhibit similar transformations. — Dr. Martins on Arvicola nivalis, a 

 new species from the region of perpetual snow in the Swiss Alps. — 

 Andral and Gavarret on Respiration. — A translation of Mr. Bowman's 

 admirable memoir on the structure and use of the Malpighian bodies 

 of the kidneys. 



Botany. — Dr. Montague's descriptions of Exotic Cellulares, con- 

 tinued. — M. Nageli on Fungi living in the interior of vegetable 

 cells (from the 'Linnaea'), with a good plate. — Professor Morren on 

 the movements and anatomy of the labellum oi MegacUnium falcatum 

 (extracted from the 15th vol. of the new memoirs of the Brussels 

 Academy). — Spach's monograph of the genus Amygdalus. Out of 

 seventeen species thirteen are inhabitants of Asia only, one of Europe 

 only, one common to Europe and Asia, and two doubtful. Nine of 

 these are new. M. Spach also enumerates seven dubious species. 



March — Zoology. — M. Leon Dufour on the Liver of Insects. 

 A long and important paper with excellent plates. — M. Quatrefages 



