1898-1902. No. 18.] CRUSTACEA. 13 



Fam. Eusiridse. 



45. Eusirus cuspidatus, KROYER. 



A solitary specimen of this arctic form was taken on July 12, 1900, 

 in the bay at Last End. 



46. Rhachotropis aculeata (LEPECHIN). 



Some specimens of this characteristic arctic form are in the col- 

 lection, these having been taken in 3 different places. 



Fam. Calliopiidse. 



47. Calliopius Rathkei (ZADDACH). 



Several specimens collected on July 31, 1899, off Disco Island. 



48. Pontogeneia inermis, KROYER. 

 Found occasionally in 2 different places. 



49. Amphithopsis glaciah's, HANSEN. 



Some more or less mutilated specimens of this genuine arctic form 

 are in the collection, these having been taken in 5 different places, in 

 some cases near the surface of the sea. 



Fam. Atylidse. 



50. Atylus carinatus (FABR.). 



This characteristic arctic form was taken in no less than 16 diffe- 

 rent places, in some of them rather abundantly. 



Fam. Gammaridse. 



51. Gammarus locusta LIN. 



Collected in 7 different places, in one of them very abundantly. 



52. Amathilla homari (FABR.). 



Several specimens of this form were secured, having been found 

 in 5 different places. 



