,3/0 Proceedings of the 



germinal vesicle clearly distinct, under a power of 600 diame- 

 ters. 



I placed a number of the medusoids in a flat and deep 

 glass saucer of pure sea-water, and in about a week young 

 Campanularias were found attached to the bottom of the 

 saucer, each of which consisted of two polyp-stalks, united by 

 a creeping fibre. 



The various stages of development in the ova were not ob- 

 served, on account of their extreme minuteness. 



In confirmation of these observations, Mr Alder writes me, 

 in answer to my statement of the fact above mentioned to him, 

 that Mr Hincks made similar observations at the Isle of Man, 

 in autumn last. And further, my friend Mr Dallas, Edin- 

 burgh, informs me, that he also observed a number of young 

 produced in a vessel containing Campanularia Johnstoni in 

 spring last. 



2. Ephelota coronata. (Mihi). 



In the seventh volume of the " Annals of Natural History" 

 (1851), Mr Alder has described three new animals, belonging 

 to the Protozoa, two of which are marine, and found parasitic 

 on Sertularia, while the third is an inhabitant of fresh water, 

 and a parasite on Paludicella. Mr Alder gave no names to 

 these animals. It therefore fell to Mr Pritchard (who, in 

 his work on the Infusoria, has included them in the family 

 Enchelia) to invent a name for them. Mr Pritchard chose 

 the designation Alderia, and specified the animals as apicu- 

 losa, ovata, and piriformis. " Alderia" had, however, been 

 previously appropriated to one of the nudibranchiate Mollusca, 

 so that the animals still remain without generic names. On 

 carefully reading Mr Alder's descriptions, and comparing 

 them with the descriptions and figures given by Ehrenberg of 

 Podophrya fioca and Acineta Lyngbyei, I have concluded 

 that Mr Alder's animals should be placed in two genera; that 

 Pritchard's two species, ovata and pyriformis (the tentacles 

 of which are slender and capitate, or knobbed) belong, together 

 with Acineta Lyngbyei, to the genus Podophrya ; whilst 

 apiculosa (the tentacles of which are pointed) must be referred 



