The Canadian Field-Naturalist. 



[Vol. XXXV. 



Staurophora mertensii Brandt. 



This is the only large Hydroniedusan of 

 the bay. It attains a diameter of as miu-h 

 as 20 centimetres, and is a eonspieuoiis 

 object with a very distinct cross, formed 

 by the extension of the lobes of the mouth 

 from the centre of the animal along the 

 four radial canals well toward the margin. 

 In the summer of 1910 it was observed 

 commonly in the channels leading into the 

 bay as well as elsewhere in the vicinity. In 

 1912 it was observed floating in the bay 

 and stranded on the sliore at 8t. Andrews. 



bay, appearing regularly every spring and 

 being so abundant during the summer as 

 to clog the planktcm nets. Cijanea, on the 

 other hand, is rare and comes into the bay 

 only periodically. For several years it has 

 been very rare or absent altogether, but 

 during this past summer (1920) it has 

 been fairly common. It did not make its 

 appearance, however, before July, and it 

 had quite evidently been brought in by 

 currents from its home in outer waters. 

 The sea anemone, Pcachia porasifica \'err., 

 that lives fastened to it. was found this 



Fig. 1. G^ellius arcoferus, the mat-sponge, from a photograph (A.G.H.). 



Since then it has not been seen until July 

 and August of this year (1920), when it 

 was found very generally in the passages 

 leading to the bay, in the bay itself, and 

 also in the tributary Avaters of the Maga- 

 guadavic and St. Croix rivers and St. 

 Andrews harbour. 



Cyanea capillata, var. arctica Per. et Les. 



This arctic form is the large red jelly- 

 fish that occurs commonly in the Gulf of 

 St. Lawrence. Aurelia flavidnla Per. et 

 Les., our other Scyphozoan medusa, is a 

 constant inhabitant of Passamaquoddy 



year attached to large specimens just as 

 w^hen Cjanea was abundant a number of 

 years ago. In that year (1913) young 

 haddock {Melanogrammns) about 5 cm. 

 long were found living commensally with 

 the Cyanea, one or two of the fishes being 

 taken from each large jellyfish. 



Polydora ciliata (Johnston 1838). 



This tubiculous annelid worm is no 

 rarity, but its zoogeographical value is 

 great, being almost cosmopolitan in dis- 

 tribution. It occurs all round the British 

 islands ; Spitsbergen ; Scandinavia ; coast 



