234 Bibliographical Xoticea. 



sjnivs orange; antennae formed anrl coloured as in aiihrnhra, 

 the flagellum ferruginous beneath : tegulaj piceous, with a 

 dark Ferruginous pateli ; first recurrent nervure joining first 

 submarginal cell a little before its end; thoracic spine &c. as 

 in suhruhra ; abdomen oval, not tapering apically, apical 

 segment not produced. Otherwise about as in suhruhra. 



Hah. Picacho Mountain, Mesilla Valley, New Mexico, 

 lilarch 25, 1900, at flowers of Sphmralcea Martii. The plant 

 \vas also new and was described in ' Botanical Gazette,' 

 July 1901, p. 60. 



East Las Vepas, New Mexico, U.S.A., 

 Feb. 4, ll'02. 



BIBLIOGllAPHICAL NOTICES. 



A Treatise on Zoologtf, Edited by E. Ray Lankester, M.A., LL D., 

 F.R.S. — Part IV. The Platj/hehnia, Mesozoa, and Nemert'uti. By 

 W. Blaxland Beniiam, D.Sc. (Lond.), M.A. (Oson.). London : 

 Adam & Charles Black, 1901. 



The present volume — the fourth in order of the complete series — is 

 by Prof. Benham, who is to be congratulated on having fulfilled a 

 very arduous task in a most successful manner. Singularly un- 

 attractive animals, and mostly parasitic in habit, it is not surprising 

 that their study is attempted only by those keenly interested in 

 the advancement of zoological science or in the investigation of the 

 many and often very painful devastating diseases which are inflicted 

 on mankind and the lower animals as a result of this parasitism. 



Condensed into a surprisingly small compass, the author has con- 

 trived to embody practically everything that is known of these 

 animals ; so that this volume will form a source of reference of the 

 highest value alike to the systematist, the morphologist, and the 

 physician. 



The historical sections of the various chapters are extremely 

 interesting reading, and bear eloquent testimony to the extreme 

 difficulty which besets the correct interpretation of the structure of 

 these animals and the many pitfalls in the path of the investigator. 



The !Mesozoa of Van Beneden are very fully dealt with in an 

 appendix to the Platyhelminths, being regarded by the author as 

 degenerate forms of this phylum — a view shared by Whitman and 

 others — and therefore not needing the formation of a special grade 

 to contain them. To this appendix the editor adds a very interesting 

 paragrnj)h on four new species of Orthoneetids parasitic in Cha^to- 

 pods and Xemertines. 



The work having been somewhat delayed in the press, a few notes 

 have been added to the chapter on the Xemertines by Mr. B.C. 

 Punnctt, of St. Andrews, in order to bring the work completely up 



