1896.] BRITISH HYDROIDS AND MEDUSE. 475 
Haeckel gives Corymorpha nana, Alder, as the hydroid belonging 
to Huphysa aurata. Iam stil] of the opinion that this is not the 
right hydroid, as the meduse are quite distinct. 
Disrripution, Mediterranean, Haeckel. Atlantic, about 50 
miles N.W. of Scotland, Maas. 
Scotland—Shetland Islands, Forbes. St. Andrews, Holt; Craw- 
ord. 
: England—Isle of Man, Browne. 
Treland—Valencia Island, Z. T. B. 
Fam. TIA RID. 
AMPHINEMA DINEMA (Péron et Lesueur). 
Oceania cinema, Péron et Lesueur (1809); Eschscholtz (1829). 
Dianea diadema, Lamarck (1817). 
Campanella dinema, Blainville (1834). 
Saphenia dinema, Forbes (1848); Peach (1849); Cocks (1849). 
Saphenia titania, Gosse (1853). 
Stomotoca dinema, Agassiz (1862). 
Amphinema titania, Haeckel (1879) ; Garstang (1894), 
At Plymouth I found this species fairly abundant during 
September 1893. Many of the specimens which I took were 
immature, about 1 mm. in length. One specimen measured 3 mm. 
in length and 2 mm, in width. The tentacles of this medusa are 
able to expand to a great length, often to ten times the length of 
the umbrella. The larger specimens have about two dozen minute 
marginal bulbs. Stomach yellowish brown. The base of the 
tentacles is of a crimson or purplish colour. 
I again took a few specimens at Plymouth during September, 
1895, but not so many as in 1893. 
DistriputTion. Scotland—Shetland Islands, Forbes. 
England—Portland, Forbes. Plymouth, Garstang; E. J. B. 
Cornwall, Forbes. Fowey, Peach. Falmouth, Cocks. Ilfracombe, 
Grosse. 
Fam. MARGHELLIDA, 
Lizzia BLONDINA, Forbes. 
Lizzia blondina, Forbes (1848) ; Peach (1849); Haeckel (1879) ; 
McIntosh (1890) ; Vallentin (1893); Browne (1895). 
Inzzia claparedei, Claparéde (1860); Haeckel (1879). 
Dysmorphosa minima, Haeckel (1879) ; Browne (1895), 
The specimens taken at Plymouth in 1893 and 1895, and at 
Valencia in 1895, clearly show that the earliest stage is similar to 
the medusa described by Haeckel as Dysmorphosa minima. The 
chief difference between Dysmorphosa minima and Lizzia blondina 
exists in the number of tentacles, which increase in number 
during the growth of the medusa. 
Dysmorphosa minima has four single perradial tentacles and 
four single interradial tentacles, 
