124 MEDUSA. SEA-NETTLE. Class VI. 



ney, in the Philosophical Transactions, in a very 

 ingenious dissertation upon luminous animals, 

 contribute greatly to give that phosphoric appear- 

 ance to the sea which is so generally observed, 

 and which has been attributed to so many 

 causes. The former are found in such quanti- 

 ties in Milford Haven, that a pint of these 

 Medusce have been obtained by filtration from a 

 gallon of the sea- water in a luminous state. Ed. 



9. Mqmo- Gm. Lin. 3153. Mem. Wern. Soc. 558. 



REA. 



* M. orbicular, somewhat plane; margin in- 

 flected, villose, tentaculated. 



Found in the Orkney and Shetland islands. 



10. AuRiTA. Gm. Lin. 3153. Mem. Wern. Soc. 558. 



* M. orbicular, with four cavities beneath. 

 Orkney and Shetland isles. 



11. Cruci- Gm. Lin. 3153. Turton Br. Faun. 139. 



ATA. 



[M. body like a transparent jelly; margin 

 fringed with fine fibres; disk marked with a 

 white cross, each arm of which has a blackish 

 spot. 



Found on the Sussex coast. 



