Echinoderms. 5 c 



Station 20g. Port Clarence, Alaska; 2-3 fathoms; sandy grey mud, with 

 algse (thread algse, Laminaria, etc.); August 4, 1913. 



Three specimens, ranging in size from 65 mm. in horizontal diameter and 

 31 mm. in height to 7 mm. in horizontal diameter and 3 mm. in height. The 

 test and tube feet are dull purplish, the spines dull olive, beneath becoming 

 tinged with dull purplish in the distal half. Mr. Johansen notes that of the 

 specimens collected at this station only the extremes in size were kept. 



Station 20m. Beach at Port Clarence, Alaska; August, 1913. 



One specimen, measuring 20 mm. by 10 mm. 



Station 37p. Beach at Bernard harbour, Northwest Territories; October, 

 1914. 



One specimen, measuring 47 mm. by 24 mm. 



Station 41. Outer harbour, Bernard harbour. Northwest Territories ;110 

 metres; sandy mud with Laminaria and Delesseria; bottom temperature 32°, 5 

 Fahrenheit; July 20, 1915. 



One specimen, measuring 37 mm. by 18 mm. 



Station 43c. West of Cockburn point. Dolphin and Union strait, North- 

 west Territories; 20-30 metres; grey mud with many stones and algse {Lamina- 

 ria, Delesseria, SLnd Lithothamnion) ; September 14, 1915. 



Ninety-four specimens, of which the largest is 53 mm. by 28 mm. These 

 are very dark in colour, deep dull purple, lighter and brighter beneath, the 

 spines above usually dark olive, sometimes deep dull purple, below dark purple 

 distally, becoming gradually olive in the proximal half or two-thirds, and often 

 with a broad subterminal dusky band. 



Station 44c. Beach at cape Barrow, Coronation gulf, Northwest Territories ; 

 August 3, 1915. J. J. O'Neill collector. 



Five specimens, the largest measuring 49 mm. by 23 mm- 



Station 44e. Kannuyuk island, Bathurst inlet. Coronation gulf. Northwest 

 Territories; 1 fathom; September 2, 1915. R. M. Anderson, collector. 



One specimen, measuring 46 mm. in horizontal diameter. The colour is 

 purple, with green spines. 



Class HOLOTHUROIDEA. 



Order Paractinopoda. 



Family SYNAPTID^. 



Subfamily MYRIOTROCHINy*. 



Myriotrochus rinkii Steenstrup 



Station 37e. Inner harbour at Bernard harbour. Northwest Territories; 

 about 2 fathoms; sandy mud with algse; September 1, 1914. 



One specimen. 



Station 41. Outer harbour at Bernard harbour. Northwest Territories; 

 about 5 fathoms; sandy mud and Laminarioe; July 20, 1915. 



Six specimens. 



Station 41c. Outer harbour at Bernard harbour. Northwest Territories; 

 3-8 fathoms; grey mud with Laminaria and Delesseria; July 28, 1915. 



Thirty-nine specimens. 



Station 43a. Off Cockburn point. Dolphin and Union strait; about 50 

 fathoms; sandy mud with pebbles, and no algse; September 13, 1915. 



Three specimens. 



Mr. Johansen writes that from the results of the investigations at Stations 

 37e, 41, 41c, and 43a it appears that Myriotrochus rinkii, the only holothurian 



