PLATE 9. 



Fig. I. Cladonema perkinsn. Nassau Harbor, Bahamas. 



Fig. 2. Cladonema mayen. Moat of Fort Jefferson, Tortugas, Florida, 



July, 1905. 

 Fig. 3. View looking down upon the aboral end of the stomach of ClaJont ma 



mayeri, showing the arrangement of the radial-canals. 

 Fig. 4. Margelopsts gibbesn, male. Beaufort, South Carolina, December 



24, 1904. 

 Fig. 5. Margelopsis gibbesn, male. Oregon Inlet, Pamlico Sound, North 



Carolina, November 12, 1904. 



Fig. 6. Margelopsis gibbesn, female. Cape Fear, North Carolina, Decem- 

 ber I, 1904. 



Fig. 7. Tentacle of Margelopsis gibbesii. 

 Figs. 8 and 9. Stomotoca dinerna, young females. Agassiz Laboratory, 



Newport, Rhode Island, July, 1892. 

 Fig. 10. Stomotoca dinema, young male. Agassiz Laboratory, Newport, 



Rhode Island, Septemper 15, 1896. 



Fig. I, copied from a drawing by Prof. Henry F. Perkins. 

 Figs. 2 to 10, from life, by the author. 



