728 Proceedings of the Royal Irish Academy. 



Tiaropsis multicirrata (Sars). 



Tiaropsis multicirrata, Haeckel, 1879, p. 179. 



In 1895, two specimens taken in April; both very early- 

 stages, about 1 mm. in diameter. 



In 1897, a solitary young stage taken in April. 



This Medusa appears to be very rare at Valencia ; but it is 

 not uncommon in other parts of the British area. 



Greene (1857) has recorded it for Belfast under the name of 

 TJiaumantias pattersoni. 



It is not uncommon at Port Erin, Isle of Man, in the spring. 



Yallentin (1897) found this species very abimdant in Falmouth 

 Harboui' during May and June, 1895. "The sea, in certain 

 protected places in the harboui', was almost solid with examples." 



Order. — Tkachomedtjs^. 



Aglantha rosea (Forbes). 



Circe rosea, Forbes, 1848, p. 34, pi. i. 



Aglantha rosea, Browne, 1897, P. Z. S., p. 833, pi. xlix. 



In 1895, only a few specimens were taken during April and 

 May. The Misses Delap sent me a specimen in July, and 

 informed me that it was abundant during September. 



In 1896, a solitary specimen was taken on January 8th. 

 During my visit in the summer it was by no means common. 

 In 1897 and 1898, not a single specimen was seen. 

 Aglantha rosea has eight marginal sense-organs, which dis- 

 tinguish it from A. digitalis, with only foui" sense-organs. 



This species has been recorded from Shetland Islands, St. 

 Andi'ew's, and Heligoland. It is an inhabitant of the Atlantic 

 Ocean, and an occasional visitor to our shores. 



Xiriantha appendiculata (Forbes). 



Geryonia appendiculata, Forbes, 1848, p. 36, pi. 5. 

 Liriantha appendiculata, Haeckel, 1879 ; Browne, 1896, P. Z. S., 

 p. 495. 



Only a few young stages were taken in August and ]S"ovem- 

 ber, 1896, and in iS^vember, 1897. 



It is an Atlantic Medusa which occasionally visits the 

 British coasts. It was first taken by Forbes in the English 

 Channel in 1846. I found it very abundant at Plymouth in 

 1893, but scarce in 1897. 



