Browne — Flora and Fauna of Valencia Hayhour, Ireland. 697 



genus have been finally determined. There may he only one species, 

 or Beveral. According to Agassiz it has a Hydi-oid form {Lafoea 

 calcarata, of Agassiz), found in Buzzards Bay, on the Atlantic coast of 

 JS'orth America. The Hydroid has yet to he found on this side of the 

 Atlantic. The Medusa may he easily recognized hy its sensory clubs 

 (cordyli) on the margin of the umbrella. It has been rarely recorded 

 in British seas. Forbes and Goodsir, I believe, found specimens in 

 1851 on the west coast of Scotland; a solitary specimen was taken by 

 me at Port Eria in May, 1894 -^ and one specimen was found in my 

 examination of Dr. Powler's collection from Kirkwall Bay in 1896. 

 These are the only British records that I know of, and up to the 

 present time it has not been taken' in the English Channel.- This 

 species has occurred every year (1895-98) at Yalencia. It appears to 

 be an inhabitant of the Atlantic coast of Ireland and Scotland. 

 The Port Erin specimen probably di'ifted down through the IS'orth 

 Channel. 



I am inclined to add Polycanna forslcalea as a fourth species, found 

 at Yalencia, and not at Plymouth. It has occurred regularly at Yalencia, 

 1896-98, whereas I have only seen a single specimen of the JEquoridae 

 at Plymouth (June, 1898). It was a few mil lim etres in diameter, and too 

 young for the determination of the species. At present there is the 

 usual difficulty about determining the different species of the genus ; 

 and, until this is done, a distribution list is useless. Eorbes certainly 

 found this species in the outer Hebrides (1851) ; and young stages of 

 ^quorea have been recorded by Greene for the south-west coast of 

 Ireland. According to Goodsii', this large Leptomedusa has a hydi'oid 

 stage. 



At Port Erin the following Leptomedusa have not been recorded, 

 but some of them ought to be found there in the summer : — Agastra 

 caliculata (the Hydroid Campamdaria caliculata of Hincks is recorded 

 for the Isle of Man by Miss Thornely), Dipleurosoma typicum, JEiicM- 

 lota pilosella (probably occurs in the summer),^ Octorchis gegenhauri, 

 and Polycanna forslcalea. 



All the Tracho medusae may be regarded as true Atlantic foi-ms ; 



1 Laodice calcarata, taken at Port Erin in May, 1899. Chadwick, H. C. 13th 

 Ann. Rep. L. M. B. C, p. 35. 



2 laodice calcarata. Intermediate stages were common in the Scilly Islands. 

 July, 1899.— E. T. B. 



2 Eitchilota pilosella, taken at Port Eiin, from June to August, 1899. Chadwick, 

 H. C. IStli Ann. Rep. Liverpool Mar. Biol. Com., p. 35. 



