264 THE CANADIAN NATURALIST. [Vol. vil 



Cruise 3. — Leaving Pictou on the 13th of August, we dredged 

 to the S.W. and S.S.W. of Pictou Island, then to the N.E. and 

 N.N.E. of Cape George (N. S.), and from there to a little dis- 

 tance off Port Hood, C. B. We next stood over to the east point 

 of Prince Edward Island, dredging at intervals on the way. 

 After this we examined the Milne Bank, also various parts of the 

 bottom from there to Cape Bear (Prince Edward I,), and to the 

 north of Pictou Island, and got back to Pictou on the 16th of 

 August. 



From Pictou to Port Hood and along the west side of Cape 

 Breton, the sea bottom consists of red clayey mud, in which 

 annelids are remarkably numerous and often of large size. At 

 almost every cast of the dredge, tangled masses of tubicolous 

 annelids (inhabiting tubes of from the yLth to a quarter of an 

 inch or more in diameter, and from one or one and a half inches 

 to nearly eight inches in length) came up in handfulls. These, 

 together with hirge naked species, are so abundant as to form 

 more than two-thirds of the whole number of specimens taken. 

 One specimen of jDiasftjlis qiiadrispmosvs Or. 0. Sars, was 

 dredged off Pictou Island, Hydrozoa and Polyzoa are tolerably 

 abundant, and sometimes very fine, in the red mud; these have 

 not yet been examined, but among them are SertuJarid argentea 

 of unusually large size, and a bushy species of Gemellcn'ia. 

 Alcyonium carneinn Ag., is one of the characteristic species of 

 the eastern part of this area, as is also an apparently undescribed 

 species of Pruqwhis, very distinct from P. cdndutns. Tunicates 

 are not unfrequent in the red mud ; the commonest of which are 

 Peloiiaia arenifera and Eugi/rtf j^ilnlarts, while '^Glandula fibrosa 

 St., occurred more rarely. With these, about sixteen species of 

 shells were collected; they are all characteristic Acadian species. 

 The temperature of the mud seems to range from 40*^ to 42*^ Fahr. 

 Off Port Hood, two large specimens of a Holothurian were taken, 

 which exactly agree with the drawing and de^^cription of the 

 Cucwnai'ia penfactes of 0. F. Miiller, as given by E. Forbes in 

 his British Starfishes. 



Off the east point of Prince Edward Island the bottom is 

 sandy, and as the depth where we dredged does not exceed fifteen 

 or twenty fathoms, the summer temperature is high, being 

 affected by surface conditions. Two small specimens of Eupi/rgus 

 scaber Lutken, and one of Molpadia volitica Pourtales, were 

 collected here, as well as examples of ^^Molgula pxipiUosa V. and 



