COASTS VISITED BY THE ARCTIC EXPEDITION. 585 



calice ; probably the septa did unite to form a central fascicle or 

 columella. Diameter of the calice 3 inches. The height of our 

 specimens we are not able to determine, only the expanded calice 

 being left ; probably it was about the same as OmpJiyma or PiycJio- 

 phyllum. 



Loc. Bobbin Bay, lat. 79° 40'. Upper Silurian. Collected by 

 Dr. Coppinger. 



Genus Calophylltjm, Dana, 1848. 



Calophylltjm phragmoceras, Salter. 



CalopTiyllmn pTiragmoceras, Salt., Sutherland's Journ. vol. ii. p. 

 ccxxx, t. 6. f. 4. 



I refer this specimen to Calophyllum pJiragmoceras, Salt. The 

 corallum occurs in clusters composed of conical corallites, which 

 rapidly enlarge at the calico, and often measure an inch in diameter. 

 The tabulae are closely set and slightly concave ; the edges of the 

 calices are not crenulated, but have very short thin lamellae or 

 septa ; the costae equal the septal laminae in number, are coarsely or 

 strongly marked and interrupted at intervals by transverse slightly 

 indented lines. Our specimen shows no evidence of calicular 

 gemmation within the edge of the older corallites. 



This coral resembles in appearance externally a compound Za- 

 phrentis, owing to the somewhat expanded nature of the calice and 

 habit of growth. The surface or epitheca is commonly striated 

 longitudinally, and intermittently constricted like Zaphrentis. The 

 tabulae 1 am not able to see, and therefore fail to notice the resem- 

 blance to Amplexus described by Salter, loc. cit. Dr. Sutherland's 

 specimens came from Wellington Channel. 



Loc. Cape Hilgard, lat. 79° 41'. 



Genus Arachnophylltjm, Dana, 1846. 



Arachnophyllum Richardsoni, Salter. 



Arachnophyllum Richardsoni, Salter, Sutherland's Journ. vol. ii. 

 p. ccxxxii, t. 6. f. 10. 



Mr. Hart, of the ' Discovery,' obtained this fine species at Cape 

 Hilgard ; it was first discovered by Dr. Sutherland at Point Eden, 

 south side of Baring Bay, lat. 76° 20'. It is well figured in the 

 volume above mentioned. The range of this species in space is 

 considerable, Mr. Hart having obtained his specimen at Cape Hil- 

 gard, in lat. 79° 40', on the east coast of Grinnell Land, 3° 20' further 

 north than Dr. Sutherland. Strephodes Austini, Salter, and Calo- 

 phyllum phragmoceras, Salter, appear to have been collected with 

 Arachnophyllum llkhardsoni at Cape Hilgard, thus showing that the 

 Baring-Bay beds must be upon the same horizon as those of Cape 

 Hilgard, 3° further north. 



Mr. Salter described and figured what appears to be this coral 

 from the Sutherland collection, loc. cit. The genus closely resem- 



