NATURAL HISTORY. ].mxxv 



from a depth of eighty fathoms off Ehzabeth Harbour. It was also found in 

 considerable numbers near the island of Igloolik on a preceding voyage. 



6.— HIPPOLITE POLARIS. 



ALPIIEUS POLARIS.— .S'ai : Sitpp. to Parry's 1st Voyage— ^. ccxxxviii., pi. 2, figs. 5—8. 

 Ross, App. to Parry's Polar Voyage — p. 206. 



A. thoracis dimidio posteriore lavi, anteriore cariiiato serrato ; clielis el unguibus apice nigris. {SaOine.) 



The excellent description and plate referred to above, render any further remark 

 unnecessary, except that the rostral dentations are usually more numerous, both above 

 and beneath. 



It is an abundant species in the Arctic Seas, 



7.— MYSIS FLEXUOSUS. 



MYSIS FLEXUOSUS.— iam .- Hist. Kat. Anim. sans Verl.—vo\. v., p. 200. 

 CANCER FLEXUOSUS.— il/«M : Zool. Dan.— vol ii., p. 34, pi. 66. 

 CANCER MVLTIPES.— Montague, in Trans. Linn. Soc.—vo\. ix., tab. 5, fig. 3. 

 CANCER OCL LATUS.— Fai .- Faun. Grwnl.—p. 245, pi. 1, figs. A and B. 

 PRAUNUS FLEXUOSUS.— Leaf//, in Edin. Encycl.~vo\. vii., p. 401. 



Though but sparingly found in the seas of Europe, it inhabits some parts of ihc 

 Arctic Ocean in amazing numbers, and constitutes the principal food of the prodigious 

 shoals of salmon, that resort thither in the months of July and August, and upon 

 which the inhabitants of Boothia depend, in a great measure, for their winter store of 

 provisions. It is also tlie chief food of the whale, by which sucli a prodigious 

 quantity of fat is produced in the body of that immense animal. 



During the summer they assemble in vast myriads at the mouths of rivers, but in ihc 

 winter are more generally distributed along the whole line of coast, and, together with 



