594 The American Naturalist. [June, 
The Marine Biological Laboratory at Woods Hall, Mass, 
INCORPORATED IN 1888. SrxTH Season, 1893. 
OFFICERS OF INSTRUCTION. 
C. O. Whitman, Director, Head Professor of Zoology the University 
of Chicago ; Editor of the Journal of Morphology. 
ZOOLOGY. 
A. Investigation. 
Howard Ayers, Director of the Allis Lake Laboratory, Milwaukee ; 
J. Playfair McMurrich, Professor of Biology, University of Cincinnati ; 
E. G. Conklin, Professor of Biology, Ohio Wesleyan University ; E 
R. Lillie, Fellow in Zoology, Chicago University. 
B. Instruction. 
H. C. Bumpus, Professor of Comparative Anatomy, Brown Univer- 
sity; W. M. Rankin, Instructor in Zoology, Princeton College; Pierre 
A. Fish, Instructor in Physiology and Anatomy, Cornell University ; 
A. D. Mead, Fellow in Zoology, University of Chicago. 
BOTANY. 
W. A. Setchell, Instructor in Botany, Yale University; W. J. V. 
Osterhout, Brown University. 
PHYSIOLOGY. 
Jacques Loeb, Assistant Professor of Physiology, University of 
Chicago. 
Ryoiche Takano, Artist; F. W. Walmsley, Collector; G. M. Gray, 
Laboratory Assistant. 
In addition to the regular courses of instruction in Zoology, Botany, 
Embryology and Microscopical Technique, consisting of lectures and 
laboratory work under the constant supervision of the instructors, 
there will be a number of lectures on special subjects by members of the 
staff. A course of lectures in Embryology will be given by Professor 
Whitman; on the Morphology of Vertebrate Head, by Dr. Ayers, and 
two or more courses in Invertebrate Zoology, by Drs. Bumpus, Mc- 
-Murrich, Rankin and Morgan. 
There will also be ten or more evening lectures on biological subjects 
of general interest. Among those who may contribute these lectures 
may be ee in addition to the instructors above-named, the fol- 
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