No. 5.] WHITEAVES — DEEP-SEA DREDGING. 265 



^M. producta St. On the Milne Bank we dredged quantities of 

 the common E china rachnius ; an abundance of fine Hydroids and 

 Polyzoa ; a few shells ; and some small algae. 



Between Cape Boar and Pictou Island the bottom is sandy, 

 with shells and a few small stones. Three kinds of sponges were 

 collected here, many hydroids, echinoderms (all common forms), 

 annelids, Crustacea, and tunicates. Among the latter are speci- 

 mens of '^Molgula littoralis Y . Shells were particularly abundant, 

 among them are Pecten temiicostatus, Modlola modiolus. Ci-enella 

 Jiigra, Astarte tmdata Gould, Cyprina Islandica, CalUsta con- 

 vexa, Pandora trilineata, Crepidida fornicata, Lunatia tri- 

 seriata, Mamma immacidatn, and several species of JBela. 



The fauna of the region north of Pictou, between the west 

 coast of Cape Breton and the east of Prince Edward Island, is 

 essentially of an Acadian type. To the north, northwest, and 

 west of Cape Breton, the deep water assemblage has probably an 

 Arctic character. 



In the marine slip at Pictou, I collected specimens of Teredo 

 navalis burrowino- into the black birch of which the roller 

 frames of the cradle are composed. At Souris, (Prince Ed- 

 ward I.), the common periwinkle of England (^Littorina Jittorea') 

 was plentiful, and it was subsequently observed at Charlottetown. 

 An Arguhis, closely allied to A. Alosce of Gould, if not identical 

 with it, was taken off Pictou Island, in towing nets, attached 

 to Gasfe7'osteus hiacideafus ? and other small fishes. Idotea 

 irrorata Say, was common on the surface at the same place, 

 and was subsequently obtained at Shediac Bay, and else- 

 where. On the shores of the Magdalen Islands it is tolerably 

 common. 



Cruise 4. — In the last cruise we endeavored to explore both 

 sides of Northumberland Straits, and dredged from Pictou as 

 far to the northwest as Miramichi B;jy. Leaving Pictou on the 

 19th of August, we first dredsed a little to the N.N.W. of Pictou 

 Island, and were then compelled by stormy weather to take 

 shelter in Shediac Bay. Being detained at Point du Chene for 

 two days, we availed ourselves of the opportunity to examine the 

 oyster beds of Shediac Bay. On these beds, from low water 

 mark down to three fathoms, the following species were met with : 



Crustacea. 

 Cancer irroratus Say. fGammarus ornatus Edrf. 



Crangon vulgaris Fab. Idotea irrorata Say. 



