386 busk's thaumantias. 



diameter of the body ; their tips adhere with force to 

 other substances, and moor the animal : their bulbs 

 contain a yellow undefined nucleus. A colourless 

 ocellus between each tentacle-bulb and the next. 

 (Fig. 7). 



Sub-umbrella moderately high, with a narrow veil. 

 Ovaries small, oval, around the radiating vessels; 

 each with a yellowish nucleus ; one was lengthened 

 and constricted in the middle; and one was wanting. 

 In others the ovaries contained globular ova with clear 

 centres in various degrees of development. (See figs. 

 9 and 10). 



Stomach small, quadrangular, almost colourless, 

 with thickened edges not frimbriated. (Fig. 8.) Ra- 

 diating and circular canals very slender. 



The tentacles vary much in number, sometimes 

 eight in each quadrant, at others not more than five : 

 some of the bulbs are often small, without filaments, 

 and as if developing. Sometimes two ocelli are be- 

 tween one pair. An ocellus occasionally has two 

 spherules in it. 



This little creature, which is very active in captivity, 

 has occurred about the shore in the neighbourhood of 

 Ilfracombe. I have little doubt that it is the species 

 which forms the subject of a valuable memoir by Mr. 

 Busk, in the Transactions of the Microscopical Society. 

 (Vol. iii., p. 22.) I would therefore propose to dedi- 

 cate it to that gentleman, under the appellation of 

 Tkaumantias Buskiana. 



The length to which the tentacles of the Medusae 

 can be extended is very great. I have seen those of 

 this little Thaumantias about an inch long, though 



