CONTENTS OF VOL. XVII. 



[SECOND SERIES.] 



NUMBER XCVII. 



1 age 



I. On the Conjugation of Cocconeis, Cymbella and Amphora; 

 together with some Remarks on Amphiphora alata (?), Kg. By H. 

 J. Carter, Esq., Assistant-Surgeon H.C.S., Bombay. (With a 

 Plate.) 1 



II. Description of a new species of ClausiUa from the neighbour- 

 hood of Cheltenham. By A. Schmidt . 10 



III. Memoir on the Indian species of Shrews. By Edward Blyth, 

 Esq. With Notes by Robert F. Tomes, Esq 11 



IV. On the Mechanism of Aquatic Respiration and on the Struc- 

 ture of the Organs of Breathing in Invertebrate Animals. By Thomas 

 Williams, M.D. Lond. (With a Plate.) 28 



V. On the Origin of the Geographical Distribution of Crustacea. 



By Mr. James D. Dana 42 



VI. On Anthracosia, a Fossil Genus of the Family Unionidce. By 

 William King, Professor of Mineralogy and Geology in Queen's 

 College, Galway. (With a Plate.) 51 



VII. On the Genus .^ssimjma 57 



New Books : — Recherches sur les Crinoides du Terrain Carbonifere de 

 la Belgique, par L, de Koninck et H. le Hon. — A Lecture on the 

 Geological History of Newbury, Berks, by T. Rupert Jones, 

 F.G.S. 58—61 



Proceedings of the Zoological Society; Botanical Society of Edin- 

 burgh 62—74 



Observations on the Blistering Beetles of the neighbourhood of 

 Montevideo, by M. A. Courbon ; Unusual Dearth of Algae in 1855, 

 by John Cocks ; Observations on Echini perforating the Granite 



