38 REVIEWS. 



Menge, in the Transactions of the Natural History Society of Dantzig, is 

 noticed elsewhere, in the Reviews of Foreign Serials. 



Annelida. The Embryology and Alternate generations of the Intestinal 

 worms have been yet further elucidated in various quarters, chiefly by 

 Siebold, Kuechenmeister, Leuckart, Beneden, and Philippi. An interesting 

 popular sketch of the recent discoveries in this province of Natural History, 

 which have excited such a lively interest, has also been given by Mr. De 

 Quatrefages, in the Revue des Deux Mondes. The Prize in Physical 

 Science, which was offered for the best account of the structure and develop- 

 ment of the common Earthworm, having been awarded to Mr. Udekem, his 

 essay has been included in the publications of the Belgian Academy. 



Protozoa, etc. The phenomenon of Encystment has been demonstrated, 

 in some additional instances, among the Infusoria. For a valuable contri- 

 bution to the Natural History of Spongilla we must refer the reader to the 

 original paper by Lieberkuehn, in Mueller's Archives of Anatomy, which 

 we have noticed elsewhere, among the Foreign Serials. 



A translation into English, from the German edition, of Van den 

 Hoeven's Manual of Zoology, by W. Clark, and also one by Dr. Knox, of 

 Milne-Edwards' Elementary Course of Zoology, from the latest French 

 edition, have recently appeared. Of the two volumes which compose the 

 former work only one has yet come out in the English, embellished with 

 the same plates as the German edition, and costing, singly, as much as the 

 latter does complete. Milne-Edwards' admirable text-book is now, for the 

 first time, given, in an English dress, in its integrity — even the most glar- 

 ing blunder of an unlearned compositor being faithfully reproduced ; — but it 

 has long been familiar to us, in substance, through the medium of extracts 

 copied into other popular works — openly, and with- due acknowledgment, 

 on the part of some authors ; — in other cases clandestinely, to deck some 

 Jackdaw of science with the borrowed plumes of an unearned reputation. 

 More important, than either of those two translations, for the promotion of 

 scientific Zoology among English scholars, is that of Siebold's Comparative 

 Anatomy of Invertebrate Animals, by the late Dr. Waldo Burnett, which 

 we have received from the other side of the Atlantic. The publication 

 there of a work so purely scientific, and of which no version has been 

 adventured in England, is but one of many proofs of the deep hold which 

 the Natural Sciences are taking in North America, even side by side with 

 the fierce excitement of gold-winning in some of the newly settled States 

 A new and enlarged edition of the original work, in German, is also com- 

 menced ; but the appearance of the volume of Invert ebrata, by Siebold, 



