570 SUMMAET OF CUREENT EBSEABCHES BEIATING TO 



and to whicli lie applied the name of Pseud.aUus ovis-j>ulmonalh. The 

 males are brown, the females milky white in colonr ; the latter lays 

 its eggs in the finest branches of the bronchi, and the palmonarj 

 alveoli ; the young escape by the trachea, and the sexually mature 

 forms enter by the same passage. The young make their way into 

 mud or water, and thence pass first of all into the stomach of the 

 sheep ; to return again to the gullet and so to get into the larynx. 

 The author beKeves that he has here to do with a diminutive form of 

 S. rufescens, which, by constantly living in the finest terminations of 

 the bronchi, has accommodated itself to the dim i n i shing calibre of 

 these vessels. 



Free -living Nematodes.* — Up to the present the free-living 

 Nematodes have received comparatively little attention ; absolutely 

 nothing is known about the exotic forms, and but few notices have 

 been published of the forms that occur in Europe. In England 

 Dr. Bastian has published an elaborate memoir of the free- swimming 

 Nematodes, chiefly the marine forms : while on the Continent Eberth, 

 Schneider, Marion, and Butschli have contributed largely to our 

 knowledge of the group. The Monograph of De Man deals exclusively 

 with those species that are found in the Netherlands. The work is 

 divided into two parts, a general and a systematic ; in the first is treated 

 the history of the group, their organization, mode of life, capture, 

 methods of preparation, and their geographical and seasonal distribu- 

 tion in the Netherlands. The second half contains a description of 

 all the species found in the Netherlands, as well as a notice of all 

 the free-living species that have been described, with references to the 

 published descriptions. The text concludes with two tables showing 

 the distribution in the Netherlands of the different species, and a 

 classification of the species according to the size of the body. The 

 Monograph is illustrated by thirty-four plates. 



TricMna and Trichinosis. j — This work is the result of a duty 

 intrusted to J. Chatin by the French Grovemment, who desired exact 

 information as to the character of the preserved meats imported from 

 America. The author concludes that " in the name of public hygiene, 

 as well as in that of agricultural interests, public opinion demands a 

 careful examination of all animals that enter the country, whether 

 they be alive or dead." But he points out that it is for the legislator 

 to prescribe the measures which are necessary for preserving the 

 public health, and that the business of the naturalist is concluded 

 when he has investigated the history and development of the j>araBite, 

 and has dra'mi from these conclusions as to prophylactic methods. 

 The work is one which should be known to all who are engaged in 

 either the physical or legislative problems which surround the ques- 

 tion of diseased meats. 



* ' Die frei in der reinen Erde und im sQssen Waeser lebenden Nemaloden der 

 niederlandischen Fauna.' Leiden. 1884. 34 pis. Cf. Biol. CentralLL. iv. (1^4) 

 pp. 191-2. 



t *La Trichine et la Trieliinose.' Paris, 1883, Sto, 257 pp. (15 pis.). 



