L.M.B.C. MEDUSA. 253 



believed that these medusae were probably the same as 

 those taken by Steenstrup. The chief difference consists 

 in the number of tentacles. Haeckel (15) considers that 

 they are distinct species and places them in his genus — 

 Amphicodon, which consists of three species — A.fritillaria, 

 A. globosus, A. amphipleurus . 



At Port Erin in 1893, on the first day of tow-netting, 

 (April 29th), I obtained specimens of Amphicodon. They 

 were fairly plentiful during the first few days of May and 

 disappeared about the 10th. Altogether I collected about 

 50 specimens. The umbrella is about 2 to 3 mm. in 

 length and not quite so broad. The opening of the 

 umbrella cavity is small as the velum is fairly wide, and 

 the large tentacle-bulb projects a little across the opening. 

 There are three non-tentacular bulbs and one large 

 bulb on the longest side of the umbrella which may carry 

 one, two, or three tentacles, usually two are present. 

 From the large tentacle-bulb medusae are budded off, and 

 often two, three or more buds are present in various 

 stages of development. I saw one young medusa break 

 away from its parent, which it resembled in every detail 

 except size. The former was about 1 mm. in length 

 and the latter was nearly 3 mm. Both carried two 

 tentacles on the large bulb. The majority of specimens 

 were without medusa-buds and had ova or spermatozoa 

 upon the manubrium. The sexes are separate. At the 

 end of March, 1894, I again visited Port Erin for the 

 purpose of collecting more specimens. The first specimen 

 was taken on March 29th, and during the whole of April 

 Arnphicodon was very abundant in the Bay. 



All the specimens have the five longitudinal rows of 

 nematocysts as described by Steenstrup. The colour 

 of the tentacle-bulbs shows a considerable amount of 

 variation. In the young specimens yellowish brown is 



