The C'Axadiax Field-Naturalist. 



[Vol. XXXV 



Staurophora innfe)isii Brandt. 



This is the only large Hydromedusan of 

 the bay. It attains a ^liameter of as mucli 

 as 20 centimetres, and is a e(uispic'Uons 

 object with a very distinct cross, formed 

 by tlie extension of tlie lobes of the mouth 

 from the centre of the animal along the 

 four radial canals well toward the margin. 

 1)1 the summer of 1910 it Avas observed 

 commonly in the channels leading into the 

 bay as well as elsewhere in tlie vicinity. In 

 1912 it was observed fl<>atiiig in the bay 

 and stranded on the shore at !St. Andrews. 



bay. aiipearing regidarly every .spring and 

 being so abundant during the s nimer as 

 to clog the plankton nets. Cyanea, 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 (|iiite evidently been brought in by 

 currents from its home in outer waters. 

 Tlie sea anemone. Peach in parasiticd \'err., 

 that lives fa.stened to it, was found this 



Fig. ]. — fjf'llius arcofeiu 



tlie nial-sponge, from 



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 waters of the Maga- 

 guadavic and St. Croix rivers and St. 

 Andrews harboui-. 



('ifniiffi r(i)}ill(ila. var. (irrlicd IVr. el Les. 



This arctic form is the large red .jelly- 

 fish that occurs commonly in the Gulf f)f 

 St. Lawrence. Aurelia flnvidida Per. et 

 Les., our other Scyphozoan medusa, is a 

 constant inhabitant of Pa.ssamaquoddy 



ye-AY attached to large specimens just as' 

 wheii Cyanea was abundant a number of 

 years ago. In that year (1913) young 

 haddock (MekDiogrannnus) about o cm. 

 long were found living commensally with 

 the Cyanea, one or two of the fishes being 

 taken from each large jellyfish. 



Poh/flora rilidla (John.ston 1838). 



This tnbiculoiis annelid Avorm is no 

 rarity, but its zoogeographical value is 

 great, being almost cosmopolitan in dis- 

 tribution. Tt occurs all round the British 

 islands; Spit.sbergen ; Scandinavia; coast 



