AGASSIZ'S ZOOLOGICAL NOMENCLATOR. 41 



habitual condition. The author arranges monstrosities under 

 four primary classes : those of volume, of form, of disposition, 

 and of number. These are divided, the first class into mons- 

 ters by diminution of volume (Atrophy), and by augmenta- 

 tion (Hypertrophy) ; the second class into monsters by alter- 

 ation of form, whether irregular (Difformation) or regular 

 (Pelorias), and monsters by the transformation of one organ 

 into another (Metamorphosis) ; the third class into monsters 

 by the abnormal connection of parts, or by the disunion of 

 parts habitually united, and into those caused by change of 

 situation, or displacement ; the fourth class into monsters by 

 diminution of number, or abortion, and those by augmentation 

 of number. Under these heads the monstrosities of the dif- 

 ferent organs of plants are considered in detail, and in a phil- 

 osophical and very interesting manner. This brief notice 

 of the plan of Moquin-Tandon's work, we are confident, will 

 suffice to commend it to the attention of the botanists of this 

 country. 



AGASSIZ'S ZOOLOGICAL NOMENCLATOR. 



This great work, 1 which must have cost an extraordinary 

 amount of labor, is now almost completed. Trusting that some 

 one of our able zoologists will duly give an account of a work 

 which is indispensable to every votary of their science, we pro- 

 pose at this time merely to call attention to the preface, pub- 

 lished last year with the ninth and tenth fasciculi, and to ex- 

 press unqualified admiration of the manner in which a subject 

 of interest to all naturalists, that of nomenclature, is there 

 treated. While botanists are enjoying the benefits of a sedu- 

 lous adherence to the wholesome rules imposed by the father of 

 natural-history nomenclature, and of nearly unanimous agree- 

 ment in the few changes which the progress of science and the 

 multiplication of its objects have rendered needful, the zoolo- 



1 Nomenclator Zoologicus, cnntinens Nomina Systematica Generum Ani- 

 malium, tarn viventium quamfossilium, etc. Auctore, L. Agassiz. Soleure, 

 1842-46. (American Journal of Science and Arts, 2 ser., iii. 302.) 



