No. 107. Gaige, Helen Thompson. — A New Gastrotheca from Vene- 

 zuela. 



No. 108. Williamson, E. B. — Notes on Celithemis with Descriptions 

 of Two New Species (Odonata). (2 plates.) 



No. 109. Dice, L. R., and Sherman, H. B. — Notes on the Mammals 

 of Gogebic and Ontonagon Counties, Michigan, 1920. (3 plates.) 



No. 110. Allen, Glover M. — Bats from Palawan, Philippine Islands. 



No. 111. Baker, H. Burrington. — The Mollusca of Dickinson 

 County, Michigan. (1 map.) 



No. 112. Ortmann, A. E., and Walker, Bryant. — On the Nomen- 

 clature of Certain North American Naiades. 



