Class VI. MEDUSA. SEA-NETTLE. 123 



Borlase's Cornwall, p. 257. tab. xxv. fig. 13, 14. 6. Simplex. 



Armless. 



M. with a plain circumference -, four apertures 

 beneath; no tentacula. 



Macartney in Ph. Trans. 1810. part ii. p. 265. 7, Scintil- 



lans. 



[M. nearly spherical, with an irregular depres- 

 sion on one side, formed of an opaque sub- 

 stance, projecting a little way inwards; mi- 

 nute; luminous. 



Mull. Zool. Dan. i. 22. tab. Macartney in Ph. Trans. 1810. g. Hemi- 

 7. ^g-. 1.5.? j5ar£ ii. p. 266. 



SPHiERICA. 



[M. of a faint purple color; diameter about 

 three quarters of an inch ; margin of the um- 

 bella undivided, and surrounded internally by a 

 row of pale brown spots, and numerous small 

 twisted tentacula; four opaque lines cross in 

 an arched manner from the circumference to- 

 wards the centre of the animal ; an opaque 

 irregular sloped process hangs down from the 

 middle of the umhelia, divided at the extremity 

 into four tentacula, covered with little cups or 

 suckers. 

 These two species described by Mr. Macart- 



