Morphology of Invertebrate Types 



Bv ALEXANDER PETRUNKEVITCH, Ph.D. 



Assistant Professor of Zoology in tlio Sliefifield Scientific Scliool of Yale 

 Uni\'crsity 



A laboratory guide which will enable the student to 

 lay the foundation for a knowledge of invertebrate anat- 

 omy. It is intended for use in the course in Invertebrate 

 Zoology which is preceded by the course in General 

 Biology or Elementary Zoology. 



The treatment of the subject differs somewhat from 

 the usual. Each chapter consists of two parts — a mono- 

 graph in which a description is given of the animal 

 selected as representative of its class, and instructions 

 for the student to follow in dissection. The descriptions, 

 while short, are sufficientl}' detailed to include obvious 

 structures of specific value. The monographs are based 

 partly on work done by others, partly on the author's 

 own dissections and investigations. 



The species used are almost all American, and, with 

 the exception of the earthworm, are entirely different from 

 those used in the General Biology course. 



THE MACMILLAN COMPANY 



Publishers 64-66 Fifth Avenue New York 



