SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE. 

 242 . 



LUCEENAHIJ^ 



AND THEIK ALLIES. 



A MEMOIR Oi\ TUE ANATOMY AND PHYSIOLOGY 



HALICLYSTUS AURICULA, 



AND OTHER LUCERNARIANS, 



DISCUSSION OP THEIR RELATIONS TO OTHER ACALEPH^; TO BEROIDS, 



AND POLYPI. 



BY 



HENIIY JAMES CLARK, B.S., A.B. 



WASHINGTON": 

 S M ri' II S O X I A N I X 8 T I T U T I N. 



1878. 



