330 
B. nobilis is a true arctic species, that has never been found South 
of the ridge in the Davis-Strait; my 3 first localities for B. nobilis 
(St. 431: 63° 24' N, 53° 10' W, 892 m., trawl. — St. 337: 64° 05' N, 
52° 20' W, 1100 m., trawl. — St. 407—08: 64° 14' N, 55° 55' W, 
839 m., clay, trawl) are thus to be referred to B. tridens. 
20.-2.-1913. 
