

SMITHSONIAN INSTITUTION. 



UNITED STATES NATIONAL' MUSEUM 



OBSERVATIONS ON THE ASTACID^ IN THE 



UNITED STATES NATIONAL MUSEUM AND 



IN THE MUSEUM OF COMPARATIVE 



ZOOLOGY, WITH DESCRIPTIONS 



OF NEW SPECIES. 



WALTER FAXON, 



Museum of Comparative Zoology^ Cambridge, Massachusetts. 



From the Proceedings of the United States National Museum, Vol. XX, pages 643-694 

 (with Plates LXII-LXX). 



[No. II36.] 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



