146 Bibliographical Notices. 



in the group, though some points of especial difficulty will probably 

 still occupy his attention. Corda's observations as to the origination 

 of the spores from sporophores and their moniliform arrangement, 

 though something of the kind was figured by Unger, deserve further 

 attention. The fact, then, that the Entophyta are true Fungi is com- 

 pletely set at rest, though at present we do not think that their affi- 

 nities are clear. 



Next in point of interest are the observations on Stilbospora, Me- 

 lanconium, &c, in which the spores are shown to spring from sporo- 

 phores. This is easily seen in Stilbospora piriformis, a generally 

 distributed species. A similar structure prevails in the analogous 

 genus Diplodia. When these observations are more extended we 

 trust that some light will be thrown on many Fungi now arranged 

 in Sphccria, but differing materially in structure. Acrospermum, again, 

 appears to be very near to Sphceronema, an affinity which could 

 scarcely be suspected from the place long assigned to the genus in 

 the neighbourhood of Sclerotium. The last three plates are devoted 

 to the structure of Hymenomycetes ; and though there is little novelty, 

 they are not without interest. We would again express an anxious 

 hope that the work may meet with due encouragement. 



Plantes Cryptogames de France. Fasc. 21. Par J. B. H. J. Des- 



mazieres. 



This beautiful work, too, we have already noticed, but the present 

 Number is so peculiar, as exhibiting nearly a monograph of Cera- 

 miacece, of which it contains fifty species, and is so admirably got up, 

 that we should deem it unpardonable not to call the attention of our 

 readers to it. The specimens have been collected in great part by 

 Messrs. Crouan, who have so diligently investigated the Hydrophytes 

 of Brest, and they have been conjoined with M. Desmazieres in the 

 digestion of the materials. 



No pains have been spared in ascertaining the synonyms and re- 

 conciling the species of Agardh and Duby, who have considered the 

 subject as if the memoir of Bonnemaison on the articulated Hydro- 

 phytes had not existed. The learned authors are most anxious to 

 have the most perfect materials possible, with a view still more ac- 

 curately to reconcile all differences, and would, we know, feel highly 

 obliged to any British Algologist who would send them specimens of 

 British s Ceramiace<e, especially of such species as are described in the 

 English Flora, but have not hitherto been figured. 



Monographia Tuberacearum, Auctore Carolo Vittadini. Mediolani, 



1831. 



To those who are acquainted only with the species of Tuber and 

 its allied genera, as described by Fries in the ' Systema Mycologicum/ 

 the present work will afford no little surprise and pleasure. It is, 

 indeed, quite extraordinary to see the number of well-defined species 

 and genera which are here characterized ; some of which present a 



