54 



HANDBOOK OF INVERTEBRATE ZOOLOGY. 



which run off from the four corners of the stomach to- 

 wards the edge of the umbrella. These are very diflScult 



&1 



Fig. 27. 



Fig. 27. — Oral surface of the same medusa. (DrawTi from nature by 

 W. K. Brooks. ) 



a. Manubrium, b. Neck of manubrium, c. Radiating chyraiferous 

 tubes, d. Reproductive organs, e. Enlarged bases of tentacles. /. Oto- 

 cysts. g. Velum. 1. Radial tentacles. 2. Median inter-radial tentacles. 

 S. Tentacles which carry otocysts. 



