62 SCIENCE FROM AN EASY CHAIR 



about the same size (Fig. 5) but very different in shape 

 and tentacles was discovered in the great African fresh- 

 water lake Tanganyika in enormous numbers, and was 

 named Limnocnida Tanganyika. Only five years ago 

 the same jelly-fish was discovered in the Victoria Nyanza, 

 and a little earlier in backwaters of the Niger. It is a 



FIG. 5. The African fresh-water jelly-fish (Limnocnida) found in 

 Tanganyika, Victoria Nyanza, and the Niger. 



curious and significant fact bearing upon the history of 

 these three areas of fresh water connected with the three 

 greatest African rivers the Congo, the Nile, and the 

 Niger thatthe same little jelly-fish is found in all of 

 them. 



And now we have just been reminded of Limnocodium, 

 the Regent's Park jelly-fish, from a remote and unexpected 



