1896»] BttMisti; 4ri)ft6iDs kUd itBDUS^. 463 



Tam. PODOOOBTNIDiB, 



PoDOCoRyNB OARNBA, Sars. 

 Hydroid Form. 



Podocoryne camea, Sars* (1846); Hiucks* (1868); Allman* 

 (1872) ; Duerdin (1893) ; Garstang* (1894). 



Podocoryne albida, Sars (1846). 



Medusoid Form. 



Podocoryne camea, Crawford (1895). 

 Dysmorpliosa camea, Haeckel (1879); Browue (1895). 

 Lizzia blondina, Bohm (1878). 



Bars first described both the hydroid and medusoid forms of 

 Podocoryne camea. Haeckel has, however, given the name 

 Bysmor^ihosa camea to the medusa. The medusa of Podocoryne 

 carnea must not be confused with Dysmorpliosa 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 tlie stomach in the early stages. 

 At Plymouth, in September 1893, and again in 1895, I tried to 

 rear the young medusse budded oif from the hydroid colonies kept 

 in glass jars. The experiments did not yield any results, as the 

 medusae died ofi within a week. 



The young medusae do not all leave the hydroid colony vidth 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 

 I 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. 



Distribution. Norway, Sars (H). Naples, Sars (H). 

 Scotland — St. Andrews, M'Intosh (M) ; Crawford (M). Firth 

 of Forth, Mlman (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. CoRYMORPHIDiE. 



CoETMOEPHA NUTANS, M. Sars. (Plate XVI. fig. 1.) 

 Hydroid Form. 



Corymorplia nutans, M. Sars* (1835) ; Forbes and Goodsir 

 (1840); Johnston (1847); Sars* (1859); Hodge* (1861); 

 Allman* (1863) (1864); Hincks* (1868); Allman* (1872); 



