274 TKANSACTIONS LIVEKPOOL BIOLOGICAL SOCIETY. 



octopunctatum. The number of tentacles in each group 

 is as follows : 



3 specimens — Perradial 3333. 

 Interradial 1111. 



The oral tentacles are without the lateral clusters of 

 nematocysts, but one specimen has a few nematocysts 

 which mark the position and origin of these clusters : 

 3 specimens— Perradial 3333 3333 3333. 

 Interradial 1112 1312 2232. 



The second tentacle in the interradial groups is very 

 small compared with the other, and has just commenced 

 to grow. 



All the specimens have medusa-buds upon the manu- 

 brium. Tentacle-bulbs yellowish brown. Diameter of the 

 umbrella about one millimetre. 



At Port Erin on the 22nd March, 1894, the first day of 

 tow-netting, I found early stages of Margellium octopunc- 

 tatum, and on every occasion on which the townet was 

 used specimens of this medusa were taken. At the end 

 of April it was very abundant and the specimens had 

 reached the Bathkea-st&ge, with three tentacles in all the 

 groups. As I left Port Erin at the beginning of May I 

 did not meet with the later stages which I obtained at 

 the end of May and the beginning of June in the previous 

 year. Mr. G-arstang obtained his specimens at Plymouth 

 during February and March, and the medusa disappeared 

 in April, which probably accounts for bis not obtaining 

 specimens with more than three tentacles in each group. 

 I took many specimens similar to those taken in the 

 previous year, showing a similar arrangement in the 

 groups of tentacles. There is no need to repeat the list 

 again. One specimen however, is exactly like one taken 

 at Plymouth on Feb. 24th, with the tentacles arranged 

 thus— perradial 3333, interradial 2111. I think that the 



