348 M. ETHEL COCHRAN. 



8. The eggs are laid beneath stones in July and early August. 

 One of the parents, usually the female, broods them. The young 

 hatch with three pairs of gills which shrivel in about a day. 



My acknowledgments are gratefully given to Dr. Clifton 

 F. Hodge for suggesting the problem, for his active interest 

 and help during the year, to Miss Louise Gulick for aid in col- 

 lecting specimens and photographic work, to Mr. William 

 T. M. Forbes for help in identifying insects, and to Dr. Newton 

 Miller for his excellent and painstaking work in photography. 

 I aslo wish to thank the many people, who by their interest, 

 advice and criticism have aided in the work. 



BIBLIOGRAPHY. 

 Abbott, C. C. 



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