1896.] BRITISH HYDROIDS AND MEDUSZ. 463 
Fam. PoDOCORYNID4. 
PoDOCORYNE CARNEA, Sars. 
Hydroid Form. 
Podocoryne carnea, Sars* (1846); Hincks* (1868); Allman* 
(1872) ; Duerdin (1893); Garstang* (1894). 
Podocoryne albida, Sars (1846). 
Medusoid Form. 
Podocoryne carnea, Crawford (1895). 
Dysmorphosa carnea, Haeckel (1879); Browne (1895). 
Inzzia blondina, Bohm (1878). 
Sars first described both the hydroid and medusoid forms of 
Podocoryne carnea. Haeckel has, however, given the name 
Dysmorphosa carnea to the medusa. The medusa of Podocoryne 
carnea must not be confused with Dysmorphosa minima, Haeckel, 
which I believe to be the earliest stage of Lizzia blondina, Forbes. 
The latter has its stomach upon a peduncle, and medusa-buds are 
usually present upon the walls of the stomach in the early stages. 
At Plymouth, in September 1893, and again in 1895, I tried to 
rear the young meduse budded off from the hydroid colonies kept 
in glass jars. The experiments did not yield any results, as the 
meduse died off within a week. 
The young meduse do not all leave the hydroid colony with the 
same number of tentacles. All have four single perradial tentacles, 
but the number of interradial tentacles shows variation. The 
usual number is either two or three, but I have.seen a specimen 
with only one tentacle. The interradial tentacles do not appear 
in any definite order. In some specimens the two interradial 
tentacles are opposite one another, in others they occupy adjacent 
quadrants of the umbrella. 
I have not seen a specimen with eight tentacles amongst those 
reared in my jars, but have taken specimens in the tow-net. 
At Valencia, on April 10th, 1895, I took a specimen of the 
medusa with eight tentacles. 
Distrisution. Norway, Sars(H). Naples, Sars (H). 
Scotland—St. Andrews, M‘Intosh (M); Crawford (M). Firth 
of Forth, Allman (H). 
England—Plymouth, Garstang and E. T. B. (H, M). Isle of 
Man, Browne (M). 
Ireland—Long Island Bay, Duerdin (H). Valencia Island, 
E. T. B. (M). 
Fam. CORYMORPHIDA. 
CoRYMoRPHA NuTANS, M. Sars. (Plate XVI. fig. 1.) 
Hydroid Form. 
Corymorpha nutans, M. Sars* (1835); Forbes and Goodsir 
(1840); Johnston (1847); Sars* (1859); Hodge* (1861); 
Allman * (1863) (1864); Hincks* (1868); Allman * (1872); 
