CONTENTS. IX 



shelled Polygastrica from Patagonian Guano, by Prof. Ehrenberg: 

 Extensibility of Membrane and Muscle in the Serpent Tribe : 

 Observations on the Nummulites, by Messrs. Jolie and Leymerie 

 Description of the Caligus Slromii, by W. Baird, M.D., F.L.S. &c. ; 

 Fossil Infusoria in Amber; Obituary — Carl Johan Schonherr; 

 Meteorological Observations and Table .389 — 100 



NUMBER VI. 



XLII. On a proposed new Order of Gasteropodous Mollusca. By 

 Joshua Alder and Albany Hancock. (With two Plates.) 401 



XLIII. Notes, &c. on th^e genus of Insects Anihonomus ; with a de- 

 scription of one new species. By John Walton, F.L.S 416 



XLIV. Some Notes on the Botany of Sinde. By Capt. N. Vicary, 

 2nd European Regiment 420 



XLV. Reply to Mi - . Smith's Remarks on Dr. Mantell's Account 

 of the Ventriculites 435 



XLVI. Reports on the Progress of Physiological Botany. No. 4. 

 On the Multiplication of Vegetable Cells by Division. By Arthur 

 Henfrey, F.L.S. &c 436 



XLVII. Descriptions of Aphides. By Francis Walker, F.L.S.... 443 



XLVIII. Corrections of "Critical Remarks on Mi - . Gray's Cata- 

 logue of Mammalia and Birds presented by B. H. Hodgson, Esq., to 

 the British Museum," Ann. and Mag. N. H. vol. xx. p. 313. By E. 

 Blyth, Curator to the Museum of the Asiatic Society, Calcutta 454 



New Books: — Recherches sur les Animaux Fossiies, par L.de Koninck. 

 — Monographia Heliceorum Viventium, sistens Descriptiones sy- 

 stematicas et criticas omnium hujus familiae generum et specierum 

 hodie cognitarum, Auctore Ludovico Pfeiffer, Dr.Cassellana...457 — 460 



Proceedings of the Linnaean Society ; Botanical Society of Edin- 

 burgh 460—465 



On some Microscopic Organisms found in the Stomach of a Peruvian 

 Freshwater Fish, by Prof. Ehrenberg ; Discovery of the Maxillary 

 Organs of the Iguanodon ; Description of a new British Mould, 

 by George Johnston, M.D. &c. ; Meteorological Observations and 

 Table 465—469 



Index 470 



Ann. § May. N. Hist. Ser.2. Vol. i. 



