St. Andrews Marine Laboratory \ 303 



which does not seem to correspond with anything named. 

 It had numerous brick-red and comparatively large ocelli. 



It is no wonder that the Medusoids of this type are so 

 abundant in St. Andrews Bay, since Obelia, Clytia, and the 

 Campanularians are so common. 



Clytia Johnstoni. 



The gonozooids are characteristically plentiful in April, 

 issuing from the stock in swarms. Moreover the old poly- 

 pites and thecie were thrown off and new ones reproduced. 

 JLo Bianco observes that at Naples the formation of the 

 Medusoids occurs in the gonophores from October till March, 

 while the free Medusoids are procured in January. 



In July numerous minute Medusoids, some probably per- 

 taining to Obelia, were captured in the bottom-nets. They 

 had perhaps only recently gained freedom, and, along with 

 the various planulaj, frequented the lower regions of the 

 w T ater. Medusoids are very common all round the British 

 shores during this month, and the water is sometimes ren- 

 dered phosphorescent by the swarms from Obelia alone. 

 These frequently occur at the surface as well as throughout 

 the water. 



Tima Bairdii, Johnst. 



In January specimens were captured fully 2 inches across 

 and almost colourless, the peduncle alone showing a whitish 

 tip, with a faint brownish hue at the base of the tentacles. 

 The reproductive elements were well advanced, so that the 

 spawning-period could not be far distant. Only a single 

 small example was procured in February in the midwater- 

 net. In May a few comparatively young specimens also were 

 obtained. It is noteworthy, however, that no very small ex- 

 amples have been seen, though occasionally in its earliest phases 

 it may have escaped observation or have been confounded with 

 other forms, especially as the young is unlike the mature form. 

 Only two small examples, one within and one without the bay, 

 were got in August. Both small (f inch) and fairly grown 

 forms (about 1^ inch) appeared in the midwater-net in Septem- 

 ber, as also the small abnormal one formerly described *. All 

 were immature. The same remarks apply to October, the 

 largest, however, being only lj inch in diameter. In Decem- 

 ber Tima reached its maximum size, a specimen fully 3 inches 

 across being captured in the midwater-net. A few of medium 

 * Vide Aim. & Mag. Nat. Hist. January 1890, p. 41. 



