72 Recent Litrrafiir^. \ Un 



' laxness ' or ' compactness ' of structure of the group under consideration, 

 since, as among mammals for example, differences that in one group (as in 

 the Pinnipedia) are looked upon as merely specific, or at most subgeneric, 

 would in other groups be considered of generic or of perhaps even higher 

 importance. Hence among the Passeres we are hardly to look for, and 

 much less to demand, as the basis for families such differences as we meet 

 with among the lower orders of the class Aves. 



Mr. Lucas's paper is an important contribution to the subject under 

 discussion, which treats not only of the affinities of the Ccerebidie, but 

 also of such equivocal forms as the genera Certhidea, Myadesfes, Phceornis, 

 and Phainofepla. — J. A. A. 



Rhoads's Reprint of Ord's North American Zoology.' — Mr. Rhoads 

 has done good service through his reprint of George Ord's North Amer- 

 ican Zoology, of which for many years not a copy appears to have been 

 anywhere accessible, either in this country or abroad. Formerly a 

 mutilated copy existed in the librarj' of the Academy of Natural Sciences 

 of Philadelphia, but later it disappeared. The perfect copy from which 

 Mr. Rhoads's reprint is made was discovered by him in the private 

 library of Dr. J. S. Cohen of Philadelphia, who kindly placed it at Mr. 

 Rhoads's service. 



The importance of Ord's ' Zoology ' results from the fact that in this 

 work a number of new North American animals were for the first time 

 here named, principally mammals. Of the eight new names which Ord 

 (in this work) appears to have given to birds, only four * prove tenable, 

 and these were long since duly incorporated into the nomenclature of 

 North American ornithology. Ord's list of bird names was compiled, as 

 Mr. Rhoads duly states, chiefly from Turton's edition of Linnieus's 

 ' Systema Naturte,' published in 1807, with the addition of the species 

 described by Alexander Wilson. Although purporting to relate to 

 " North America," many European and a larger number of South Amer- 

 ican species are included. The list proper (pp. 315-319) consists of 



' A Reprint | of the | North American Zoology, | by | George Ord. | Being 

 an exact reproduction of the part originally compiled | by Mr. Ord for Johnson 

 and Warner, and first | published by them in their | Second American Edition 

 I of I Guthrie's Geography, | in | 181 5. | — | Taken from Mr. Ord's private, 

 annotated Copy. | To which is added an Appendix on the more important | 

 scientific and historic Qustions [sic] involved. | By | Samuel N. Rhoads. | 

 — I Published by the Editor. | Haddonfield, New Jersey. | 1894. — 8vo., pp. 

 X ( = introduction), 290-361 ( = reprint), 1-90 ( = appendix). 



'^ Phasiamis colunibianus = Pediocates phasianellus columbianus (Ord); 

 Sterna Philadelphia = Lartts Philadelphia (Ord) ; Larus delawarensis = Larus 

 delawarensis Ord; Anas columbianus = Olor columbianus (Ord). 



