376 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



the same species. I took two specimens off Port Erin in 

 August, 1892. The contents of the tow-nets were unfor- 

 tunately preserved at sea, so that the colour of the medusa 

 was destroyed. In shape and size they resemble the 

 figures given by Forbes of Steenstrupia. Haeckel regards 

 Steenstrupia galanthus as the medusa of the hydroid 

 Gorijmorpha nutans, of AUman and Hincks, but not of 

 Sars. The various species of Corijmorpha and their 

 medusae require careful revision. 



Euphysa aurata, Forbes (9). 



A single specimen of this medusa was taken on May 

 5th, 10th, and 20th ; and five specimens on June 5th," 

 1893. 



The umbrella of the largest specimen measured 4^ 

 mm. in length and S^ mm. in width ; the smallest 3 J mm. 

 long and 2 mm. wide. One specimen taken on June 5th 

 with ring-canal coloured in several places with a crimson 

 pigment. The three bulbs, without tentacles, had their 

 centres coloured with a brilliant crimson pigment, but 

 the basal bulb of the large tentacle was very faintly 

 coloured with crimson. 



One specimen, taken on March 22nd, 1894, the first 

 day of tow-netting, measured 35- mm. in length and 

 2 mm. in width. None seen until April 18th when three 

 were captured, the largest 6 mm. in length and 4J mm. 

 in width. After this date a few were regularly taken in 

 the tow-net. 



The umbrella is always longer than wide, and laterally 

 very thick ; the latter a characteristic feature by which 

 this species may be readily distinguished from other 

 uni-tentacular medusse. The ex-umbrella has a few 

 scattered nematocysts. 



Forbes (9) in his description of this species writes : — 

 *' The orifice (of the umbrella cavity) is rather contracted 



