October 26, 1883.] SCIENCE. 571 



PACKARD'S PHYLLOPOD CRUSTACEA. 



A monograph of the phyllopod Crustacea of North 

 America, with remarks on the order Phyliocarida. 

 By A. S. Packard, Jun. Author's edition, 

 extracted from the twelfth animal report of 

 the U. S. geological and geographical survey. 

 Washington, 1883. 298 p., 39 pi., map. 8°. 



Although Professor Packard began publish- 

 ing upon the Phyllopocla long ago, and has for 

 several years been well known to be engaged 

 upon a monograph of the North-American spe- 

 cies, the bulk of the work just published, and 

 the profusion of its illustrations, are a great 

 surprise. It is the most extensive, and in 

 man}' ways the most important, monographic 

 contribution to American carcinolog^' ; and, 

 however we may criticise the execution of the 

 work, every student of the American fauna 

 must feel grateful to the author for undertak- 

 ing and accomplishing it. 



The work is much more than a systematic 

 monograph of North- American Phyllopoda, 

 as the following table of contents will show : 

 I. Classification of the living Phyllopoda, 

 which includes the systematic description of 

 the North- American species ; II. Geological 

 succession, including descriptions of the North- 

 American fossil species ; III. Geographical 

 distribution ; lY. Morphology and anatomy ; 

 V. Development, metamorphoses, and gene- 

 alogy ; VI. Miscellaneous notes on the repro- 

 ductive habits of Branchipodidae, b}' Carl F. 

 Gissler ; VII. The order Phyliocarida, and its 

 systematic position ; VIII. Bibliograph}^ ; Ap- 

 pendix, consisting of translations or abstracts 

 by Gissler, of papers by C. T. von Siebold, 

 on Artemia fertilis from Great Salt Lake, and 

 on parthenogenesis in Artemia saliua ; and by 

 Schmankewitsch, on the relation of Artemia 

 salina to Artemia Muehlhausenii and to the 

 genus Branchipus, and on the influence of ex- 

 ternal conditions of life upon the organization 

 of animals. There is some confusion between 

 the titles of the principal divisions, which are 

 given above, and the table of contents in the 

 work itself. Scarcely an}' of the titles are the 

 same ; and, in place of ' Miscellaneous notes 

 on the reproductive habits of Branchipodidae,' 

 _we Jiaye,_ jnjLhe table of contents, ' Relation 



