Miscellanies. 396 



DOMESTIC. 



1. Professor Jacob Green's Monograph of the TriloUies of North 

 America, with colored models of the species. — The author, in his in- 

 troduction, after stating the general characters by which these fossils 

 may be recognized, enumerates the genera established by previous 

 authors, viz. five genera from Brongniart, one genus from Dr. DeKay 

 and three genera from Prof. Dalman. The essential characters of 

 all these genera are concisely given, so that those who may wish to 

 examine this subject, may do it without resorting to the rare and ex- 

 pensive works of the French and Swedish naturalists. A tenth 

 genus is here added by Prof. G. to include some curious foreign 

 trilobites. A list of all the species heretofore described is then added 

 and the introduction closes with some speculative remarks. 



In addition to the ten genera in the introduction, five other genera 

 are proposed by the author, all supposed to be peculiar to North 

 America ; he also noticed two others suggested by Prof. Eaton. 



The species described as natives of North America are thirty three 

 in number; twenty two of which are supposed to be now described for 

 the first time. The work then terminates with some brief observa- 

 tions on the nature of the trilobites, in which there is a notice of a 

 recent trilobite, now in the Albany Institute. It is to be regretted 

 that that animal has remained so long undescribed. 



The monograph is admirably illustrated by the colored models, 

 done in plaster by Joseph Brano, whose success in this effort, must 

 give full confidence that his talents can be advantageously employed 

 on other occasions in the service of natural history. 



We are happy to see this application of the art of modelling thus 

 favorably introduced into this country ; it must be of great utility to 

 cabinets, and teachers, as well as to original investigators. Mr. Bra- 

 no's models are beautifully done, and are worthy of the monograph 

 to which they belong. 



Prof. Green appears to us to have executed his work with fidelity, 

 ability and good taste, and it cannot fail to aid in promoting our geo- 

 logical researches. It is worthy of being mentioned that the mon- 

 ograph is got up in a very neat style, and forms a very convenient, 

 volume, either for the desk or the pocket. The minute and exact 

 examinations and descriptions of natural history are very important 

 in the discrimination of species and genera, as well as of their various 

 other relations. We should be very glad to see a complete set of 



