MUSEUM OF COMPARATIVE ZOOLOGY. 89 



EXPLANATION OF THE PLATE. 



a. Axis. 



a a. Float. 



/). Contents of polypite (Alga?). 



c. " Peronise." 



cl. Extension of bell cavity into the " velarium." 



e. Projection of tlie bell margin near an otocyst. 



/ Mouth (opening into a gastric cavity). 



g. Projection into the bell cavity from which the stomach hangs. 



h. Hood. 



i. Cluster of nematocysts. 



k. Annulations formed by rows of nematocysts on the tentacles. 



/. Lips. 



//). Labial papillas. 



m. Mouth. 



7nl. Marginal lappets. 



m s. Muscular bands. 



oc. Otocyst. 



;). Polypite. 



/)/(. " Phacellen." Sexual filaments. 



s. Sexual organs. 



i. Tentacles. 



/ 1. Tentacular appendages. 



r. Velum. 



Fig. 1. Rhizophjisa Eijsenhardtii Geg. 

 " 1". Portion of a tentacle of R. Eysenhardtii. 

 " 2. Young of an unknown INledusa. 

 " 3. The same from below. 

 " 4. Larva of Tamoj/n punctata, sp. nov. 

 " 5. Older larva of the same. 

 " G. View of T. pinictata from below 

 " 7. Larva of an unknown Tubularian. 

 " 7^. The same from below. 

 " 8. Oceaniopsis IJcnnudeiisis gen. et sp. nov. 

 " it. View of half of the same from below. 



" 10. The same, from larva somewhat older. 



