4 REVIEWS. 



while Stauroneii pkcenicenteron is equally abundant in Britain, Sicily, and Nova 

 Scotia. 



" These notes of localities will give some idea of the wide distribution of our 

 fluviatile Diatomacese; more numerous gatherings would, no doubt, greatly extend 

 the list, and the following circumstance will show how generally our commoner 

 British forms are diffused throughout European localities that have been care- 

 fully examined. During a tour in Languedoc and the Auvergne, in the spring 

 of 1854, I made upwards of forty gatherings from the rivers, streams, and lakes 

 of the district I traversed ; in these I detected one hundred and thirty species, 

 described in the present work, and but one form not yet determined as indigenous 

 to Britain. If this be the case with a district, much of whose Phanerogamous 

 flora is so different from our own, it bears out the view I have taken, that these 

 organisms eojoy a range of distribution far more general than the higher orders 

 of plant life. 



" Nor is the distribution of marine species less notable for its extent and uni- 

 formity. Coscinodisciu eccentricus and Coscinodiscus radiatus range from the 

 shores of Britain to those of S. Africa. Grammatophora marina and Grammato- 

 phora maeilenta are found in almost every marine gathering from the Arctic 

 Ocean to the Mauritius. Stauroneis pulchella, Cocconeis scutellum^ and Biddulphia 

 pulckella are equally abundant on the European, the American, and the African 

 coasts ; while Rhabdonema adriaticum belies its name by its occurrence in the 

 Indian, Atlantic, and Pacific oceans. During the researches already mentioned 

 in the South of France, I made several prolific gatherings on the shores of the 

 Gulf of Lyons ; but of thirty-three forms occurring in these, Hyalosira delicatula 

 Kuetz. was the only one not familiar to me as a British species." 



In our notice of the first volume of "The British Diatomaceae," we 

 ventured to predict the rapid discovery of new forms, which would result 

 from having so valuable an aid placed in the hands of the investigator. 

 Our prophecy has turned out true. In proof of this, we have only to refer to 

 the appendix of the present volume, where the reader will find no less than 

 seventy-two species described, belonging to genera contained in the first 

 volume, and all of which have been discovered by various observers since 

 that volume was published. 



We cannot conclude the present notice without a word regarding the 

 thirty-seven plates with which it is illustrated. These plates, like those of 

 the former volume, are engraved by Mr. T. West. They are even superior, 

 as works of art, to the plates contained in that volume, and deserve our 

 highest praise as specimens of Natural History iconography. G. J. A. 



Elements of Entomology ; an Outline of the Natural History and 

 Classification of British Insects. By William S. Dallas, F.L.S. 

 London : Van Voorst. 

 A work bearing the above title is now in course of publication. It is 

 to be completed in fifteen monthly parts, three of which have already 

 appeared. When we add that they are brought out at the very low price 



