November 22, 1912] 



SCIENCE 



717 



divided into two families in which are in- 

 cluded fifty-two genera; the Paradermaptera, 

 in which there is but one family, including 

 two genera; and the Eudermaptera, divided 

 into three families, containing seventy-seven 

 genera. 



Dr. Burr is recognized to-day as the most 

 eminent student of this order of insects, which 

 until recently has been somewhat neglected, 

 but with which, thanks to his patience and 

 learning, no entomologist need now claim ig- 

 norance for lack of adequate and authoritative 

 treatises upon the subject. The end of Dr. 

 Burr's labors has not, however, been reached, 

 and he intimates that he is preparing a still 

 more complete and elaborate work, which will 

 deal with all known species from all parts of 

 the world. When this task shall have been 

 completed no order of insects will have been 

 more thoroughly monographed than this. 



The plates illustrating the present work are 

 excellent, and with the exception of a few 

 errors in punctuation the tjrpography is as 

 good as the illustrations. 



W. J. Holland 



College Zoology. By Robert W. Hegner. 



Macmillan. 1912. Pp. xxv + Y33. 



In this book " (1) Animals and their organs 

 are not only described, but their functions are 

 pointed out; (2) the animals described are in 

 most cases native species; and (3) the rela- 

 tions of the animals to man are emphasized." 

 The discussion of each phylum is introduced 

 by an account of one or more types. The 

 general plan is not unlike that in Parker and 

 Haswell's " Text-book of Zoology." Hegner's 

 book will, however, probably prove to be better 

 suited to American students because it dis- 

 cusses types they may meet every day. 



The book is progressive and up-to-date. 

 Such topics as the recent work on the hook- 

 worm in the United States, and the investiga- 

 tions of the United States Department of 

 Agriculture on bird foods are considered. 

 Many old familiar names are replaced by more 

 modern terms and we find TricMnella for 

 Trichina, Amelia for Amoeha, DoUchoglossus 



for Balanoglossus, Anthozoa for Actinozoa, 

 Branchiostoma for AmpMoxus, etc. The 

 derivation of all scientific terms is given, and 

 there is full citation of the authorities for 

 figures. Pew of the figures are original, but 

 have been largely selected from other works. 

 They are good for the most part. 



Evidences of carelessness or hasty prepara- 

 tion appear in several places. Por example, 

 it is said that in the Metazoa, " the entoderm 

 becomes the epithelium of the digestive tract, 

 pharynx and respiratory tract" (p. 89) — a 

 statement that will not hold true for all in- 

 vertebrates; the aboral pole of crinoids is said 

 to be " Usually with cirri or sometimes with 

 a stalk " (p. 190) when the opposite is true ; 

 the eyes of the crayfish are said " to produce 

 an erect mosaic or ' apposition image ' " (p. 

 286), which would doubtless lead a student to 

 believe that the two types of images were the 

 same ; on page 300 " Cyclops " is referred to as 

 a species; Branchipus stagnalis is said to be a 

 form of Ariemia salina (p. 293), a view that 

 has long been given up; Polychosrus is listed 

 as a triclad turbellarian (p. 156) ; the peri- 

 cardium is affirmed to be a part of the coelom 

 (p. 406). The book is remarkably free from 

 typographical errors. 



In the opinion of the reviewer this work is 

 the best general college text-book of zoology 

 that has been written up to the present time 

 for use in the United States. The publishers 

 have done their part in excellent fashion; the 

 text is generally clear and understandable; 

 the figures are good; and there is a fine index. 

 The book contains many loose statements and 

 some small errors; the writer has evidently 

 been actuated by a desire to get out a good 

 book quicTcly and has not always made con- 

 servative statements nor cheeked errors care- 

 fully. Nevertheless these defects are not 

 serious enough to detract from the general 

 value or usefulness of the work and it will 

 doubtless continue to be popular for several 

 years. A second printing has already been 

 issued. 



A. S. Pearse 



Univeesitt op Wisconsin 



