178 PROCEEDINGS OF THE ACADEMY OF [Feb., 



Station 50. Karnah, 30-40 fathoms. .30 sijeciraens. 



Station 51. Robertson Bay, 35-40 fathoms. 20 specimens. 



Station 52. Robertson Bay, 5-15 fathoms. 53 specimens. 



This was by far the most numerous Oi)hiurid found by the 

 expedition, and indeed one of the most common forms brought 

 up by the dredge or trawl. The series contains individuals ranging 

 in size from 2 mm. (Station 34) to 15 ram. (Station 45), disk- 

 diameter. 



Distribution. — Arctic and Sub-Arctic: coast of Massachusetts, 

 northeast Atlantic (1,207 to 2,435 fathoms. Porcupine Ex.), 

 Greenland, Discovery Bay, Hayes Point, Franklin Pierce Bay 

 (Nares Ex.), Assistance Bay (Penny's voyage), Iceland, Jan 

 Mayen Island, Faroe Channel, Lofoten Islands, Spitzbergen, Nova 

 Zembla, Kara Sea. Range in depth, 5-4,453 meters (Ludwig). 



15. Ophiopholis aculeata Gray. 



OpMopJioliis aculeata Gray, Radiate Animals of the British Museum, 



p. 25, 1848. 

 OphiophoUs hellis Lyman, 111. Cat. Mus. Comp. Zoo)., I, p. 96, PI. I, 



figs. 4-6, 1865. 



Station 60. Battle Harbor, Labrador, 12-14 fathoms. 1 speci- 

 men. 



This widely distributed species is represented by a single small 

 specimen (3.5 mm, disk-diameter), and thus not strictly among 

 the Greenland collections. 



Distribution. — Arctic and Sub-Arctic, Circumpolar: North 

 American coast as far south as Cape Hatteras, Greenland (Nares 

 Ex., lat. ()0°), Godhavn (Hayes Ex.), British coasts, Faroe 

 Islands, Iceland, Jau Mayen Island, Si^tzbergen, Kara Sea, 

 Bering Straits. 



Range in depth, to 1,829 meters (Ludwig). 



16, Amphiura sundevalli (Mailer and Troschel). 



Opiiiolepis sundevalli Miiller and Troschel, Syst. der Asteriden, p. 93, 



1842. 

 Amphiura sundevalli Ljungman, Oph. Viveutia of K. Akad. p. 320, 



1866. 

 Amphiura Jiolbbli Liitken, Vid. Meddel., November, 1854, p. 98. 

 Amphiura holboli Lyman, 111. Cat., etc., p. 118, 1865. 



Station 27. Off Cape Chalon, 35 fathoms. 1 specimen. 

 Station 45. Barden Bay, 10-40 fathoms. 4 specimens. 

 The disk-diameter of these specimens is from 8 to 9 mm. 



