Vol. II. No. I. 



BULLETIN 



FROM THE 



LABORATORIES OF NATURAL HKTORY 



OF THE 



State University of Iowa. 



/. THE PSELAPHID^ OF NORTH AMERICA, 

 A Monografh, 



By E. Brendel, M. D., and H. F. Wickham. 

 — Concluded. 



II. NOTES ON TRICHINA, 



By S. Calvin. 



///. THE LCESS AND ITS FOSSILS, 



By B. Shimek. — Concluded. 



PUBLISHED 



BY AUTHORITY OF THE REGENTS. 



IOWA CITY, IOWA. 

 November, 1890. 



