71 



VITA. 



The writer, Plenry Farnham Perkins, v;as born ^'lay 10, 

 1S77, in Burlington, Vermont. He is the son of George Hen- 

 ry Perkins, Ph.D., Yale, 1867, Howard professor of Natural 

 History at the University of Vermont; and of Mary Harnham 

 Perkins, of Galesburg, Illinois, A.B., Knox College, 1869. 



The degree of A.B. was received from the University 

 of Vermont in 1898, at the completion of the regular four 

 years' course in classics, literature, mathematics and the 

 sciences. During the four years since October, 1898, the 

 writer has been enrolled as a graduate student in the Johns 

 }Iopkins University, in the department of Biology, Phys- 

 iology and Physics were taken as subordinate subjects. The 

 summers of 1899, 1900, and 1901 were spent in research at 

 the sea-coast of tliis country and the Bahama Islands. Two 

 papers have been published giving in abstract some results 

 obtained while investigating the development of the Hydro- 

 medusa CTonioneina I'urbachii , the subject of this disserta- 

 tion. A third paper appeared in the University Circulars 

 on a jelly-fish found at Nassau, N.P.Id., not previously 

 known on this coast. 



