JAMES A. GRIEG. [2nd ARC. EXP. FRAM 



Sept. 20, 1900. Head of Gaase Fjord; 40— 6 m. Small stones and clay. 



July 5, 1901. The Sound. 



July 8, 1901. Ren Bay. 



July 12, 1901. Bay at Land's End. 



July 19, 1901. Gaase Fjord. 



July 19, 1902. North Devon, outside the camping-ground; 14—6 m. 



Ophiacantha bidentata, which is one of the most characteristic 

 brittle-stars in Spitzbergen, was found by the Fram Expedition only in 

 Havne Fjord in any great quantity. In the other localities explored by 

 the Expedition, it occurred sparsely. 



The largest specimens have a disc-diameter of 17 mm. As already 

 pointed out by Mortensen (27, p. 86), the inner tentacle-pores may 

 often have two papillae. In one specimen, I found even three. 



Gorgonocephalus eucnemis, Muller & Troschel. 



Locality. 

 July 22, 1900. Winter harbour, Havne Fjord; about 60 m. Small 



stones. 

 July 23, 1900. Winter harbour, Havne Fjord; about 40 m. Small 



stones. 

 Aug. 4, 1900. Sjopolse Ness; 50 m. 

 July 17, 1901. Gaase Fjord. 



This species has not previously been found in the waters north 

 and west of Baffin Bay. Only Gorgonocephalus agassizi has hitherto 

 been recorded from that quarter (Duncan & Sladen, 5, p. 468, 6, p. 69). 



The disc of one of the specimens from Havne Fjord measures 6.5 

 mm. in diameter. It very much resembles a Gorgonocephalus agassizi, 

 measuring 5.5 mm., from Norman Light, Labrador, which I have men- 

 tioned in "Gronlandske Ophiurider" (12, p. 10), although the primary 

 plates on the abactinal side of the disc are not yet all covered with 

 granulse. The arms branched 5 times. 



The remainder of the Fram Expedition specimens have a disc- 

 diameter of from 14 to 47 mm., the length of the arms between the 

 first and the fifth branch is from 35 to 79 mm., the thickness of the 

 arms between the first and second branchings from 2.5 to 8 mm. The 

 disc of the Gorgonocephalus agassizi taken by the Fram Expedition 

 measures 39 mm., the length of the arm 78 mm., its thickness 4.5 mm. 



