29(3 On the Medus(e of ^i. Andrews Bay. 



Leptomedus.e. 



The Leptomedusaj were numerous and seem to be the 

 predominant order in the bay, and, indeed, in the North 

 Sea. The chief forms were Thaumantias hemisphferica {incon- 

 spicua, Forbes), ocellata^ and Laodice cruciata {Thaumantias 

 pilosella), with marginal cirri and clubs. Both swarmed 

 throughout August, and continued in diminishing numbers 

 till November. 



The interesting vesiculate form Tima Bairdii, with its 

 characteristic long peduncle, was familiar throughout the 

 autumn and winter, although generally brought in only one 

 at a time. A specimen more than 2 inches in diameter 

 occurred on 21st January ; after that it disappeared. 



A form evidently allied to Tima^ but with shorter peduncle, 

 with more numerous tentacles, and with the reproductive 

 organs only on a portion of the canals, was found in great 

 numbers in August, but not later. This is probably the 

 Irene pellucida of Ha3ckel {Geryonopsis pellucida, Forbes). 



The ocellate Melicertidium octocostatum {Stomobrackium 

 octocostatum) , with its eight canals, was found in August and 

 again (ripe) in January. In each case there was only one 

 individual. 



Trachomedus^. 



The Trachomedusse were unrepresented in August ; but 

 Aglantha diyitalis {Circe rosea) made its appearance about 

 the end of September, and was numerous and ripe in January. 

 Not the slightest tinge of the colouring from which it gets its 

 name was noticed in any of the specimens. 



Naecomedusje. 



One individual of Polyxenia cyanostylis [Polyxenia Alderi, 

 Forbes) was brought in on 18th August. 



ACRASPEDiE. 



The Tesseridge were represented by Lucernaria^ found 

 plentifully in the seaweed in the rock-pools below the labora- 

 tory, and the Ephyroniaj (Discomedusee) by Cyanea and 

 Aureliuj only too common in the sea and along the sliore. 



Planul^. 



There were some fine series of Cyanea planula in the 

 laboratory in November. 



