45 



V. Neuroptera, Orthoptera et Polypos ; 



VI. Reptilia; 



VII. et VIII. Pisces, et Hymenoptera ; 



Monographies D'Echinodermes vivans et Fossiles, par 

 L. Agassiz : — 



1. Livraison, contenant Les Sal^nies ; 



2. Les Scutelles ; 



8. Les Gal^rites et Les Dysaster, par E. Desor ; 



4. L'Anatomie du genre Echinus, par G. Valentin, (avec 

 un Atlas de 8 planches in folio, et 1 pi. in 4to.) 



Description des Echinodermes Fossiles de la Suisse; par 

 L. Agassiz : — 



Premiere partie, Spatangoides et Clypeastroides ; seconde 

 partie, Cidarides. 4to., Neuchatel, 1839. 



Traite Elementaire de Pal^ontologie ou Histoire Naturelle 

 des Animaux Fossiles, par F. J. Pictet. 4 vols. 8vo., Paris, 1844. 



Description des Coquilles et des Polypiers Fossiles des Ter- 

 rains Tertiaires de la Belgique, par P. H. Nyst. 4to., BruxeUes, 

 1844. 



The Chairman stated that these valuable books on Natural 

 History, hadbeen purchased by the Council on very advantageous 

 terms, and for practical purposes as well as for reference, consti- 

 tuted a most desirable accession to the Library. 



One of the specimens of brain-coral (Meandrina), presented 

 at a former meeting by Randall Hatfeild, Esq., was upon the 

 table ; and Mr. Charlesworth stated that upon chipping away 

 portions of the base so as display the interior, it was found to 

 contain a colony of boring MoUusca, among which he had 

 determined the following genera: Lithodomus, Gastrocheena 

 (two species), Petricola (two species), Modiola, and Area. Most 

 of the above were so beautifully displayed in situ, that Mr. C. 

 regarded the specimen as by far the most valuable and instruc- 

 tive of the kind he had seen. 



The following communication was then read from "W. C. 

 Williamson, Esq., entitled, " On the scaly vegetable heads or 



g2 



