554 Professor Emerson on HalVs Geological Collections. 



at a point t\ hich Mr. Hall says is a mountain of fossils similar to the limestone 

 bluff at Cincinnati, with which he is familiar."* 



These specimens came manifestly from the ridge at the head of the bay, to 

 ■which Hall gave the name Silliraan's Fossil Mount, and which in his Narrative he 

 compares to the Cincinnati bluff. Another portion of the collections was stored 

 at I^ew Loudon, and, after the departure of Hall upon his second visit to the Arc- 

 tic Eegions, was presented to the cabinet of Amherst College by Mr. J. J. Copp, of 

 Groton. Conn., a graduate of the college. It was contained in three large boxes, 

 weighing about two hundred pounds; they had not been opened since they were 

 packed by Hall in Eescue Harbor, Field Bay. The collection i)resented, on its 

 opening, a verj* unpromising appearance. Having been packed with greasy and 

 sooty papers in the igloos of the natives or upoa the deck of the whaler, and hav- 

 ing remained untouched for so long a time, it was covered with mold, and many 

 of the labels were illegible. Fortunatelj^, the most interesting specimens had the 

 locality marked in ink or pencil upon the surface of the rock itself, and in other 

 cases, a study of Hall's jSTarrative enabled one to restore with a good degree of 

 certainty the exact localities from which they came. The localities, however, 

 quoted in the following paper are, in all cases, those given by Hall himself.t 



*Eeport on tlie geological and miueralogical specimens collected by Mr. C. F. Hall in Fro- 

 bisher Bay. — Am. Jour. Sc, 2d series, vol. 35, 1863, pp. 293, 294; also "Hall's Arctic Eesearchcs," 

 App. X, p. 594. 



tThe boxes contained specimens from other Arctic Regions besides Baffin's Land, viz: (1) 

 Several from Holsteinborg, Greenland, picked up by Hall when liis ship visited that port, and 

 (2) several from Melville and Beechy Islands, manifestly collected by McClintock's Expedition in 

 18.53*, and a number from both shores of Smith's Sound. I think it probable that they were pre- 

 sented to Captain Hall in Holsteinborg and packed by him with his other things in Eescue Har- 

 bor. It is certain that the boxes were not opened after their arrival in this country until they 

 came into my possession. 



The specimens were as follows : 



HOLSTEINBORG. 



l.t Gray translucent quartz. 



2. White granular orthoclase. 



3. Gabbro, a rock of medium grain, consisting of a green compact feldspar resembling 

 Baussurite, pearl-gray to greenish-gray diallage, brown biotite in abundance, quartz sparingly, 

 and carbonates, as indicated by long-continued effervescence with acids. 



The brown mica is arranged in one plane, giving the rock a complete gneissoid structure, 

 making the rock in fact a middle form between gneiss and gabbro. Two narrow quartz veins 

 traverse the rock, one in the plane of lamination and the other at right angles thereto. 



4. Pale flesh-colored black mica gneiss. 



5. Dark gray thin-bedded black mica gneiss. 



6. Gray-black mica gneiss. 



7. Eeddish homblendic gneiss. 



* Joiirnal of the Ro3al Dublin Soc. 1857, p. 215. 



t The numbers refer to numbers attached to the specimens in the collection of Amherst College. 



