574 Professor Emerson on HaWs Geological Collections. 



The rock seems to be the same with those of Cape Alexander, "Wolston- 

 holme Sound, and Byam Martin's Island, and is probably from the base of the 

 Carboniferous. 



109. LOIESTONE. 



A gray crinoidal limestone, made up of comminuted fragments of corals and 

 crinoids, all indistinguishable. Lower Silurian? near head of Frobisher Bay. 

 The ostracoids mentioned beyond occur in a similar drab limestone. 



110. LraiESTONE. 



A very compact red-gray limestone, deeply corroded by sea- water. Lower 

 Silurian. Locality, O in-seen-o-ping ; partly illegible. 



111. Lmiestone. 



A large flat piece of a compact even-bedded dark redtlish-gray limestone, 

 breaking with large conchoidal fracture, and containing, besides minute fragments 

 of coal, part of the last whorl of a large longitudinally striated univalve. Lower 

 Silurian. 



Locality, Frobisher Bay. 



112. Limestone. 



A deep black, massive, flinty, bituminous limestone, effervescing abundantly 

 with acid, with perfect conchoidal fracture, weathering white externally to a dis- 

 tance of .5-2 mm. TJtica slate. Localities, Frobisher Bay, Kun-gum-mi-ooke. 



113. Ldiestone. 



A dark brown, thin-bedded flinty limestone, with spots of coaly matter from 

 graplotites, Utica slate. 



Localities, Frobisher Bay. French Head in Field Bay. Fragments of the 

 limestones Nos. 112 and 113 were also present in abundance from many other 

 points in Field and Frobisher Bay without special labels, and contain all the Utica 

 slate trilobites and graptolites found in the collection. 



114. Dolomite. 



A large mass of a ragged cavernous dolomite, very harsh to the feel, dull 

 gray in the interior, but in large part rusty. 

 Frobisher Bay. 



115. Dolomite. 



A large mass of compact buff dolomite, clouded with bands of smoke gray, 

 containing crinoid stems, Halysites catenulata, Pentamerus conchidium, Dal. 

 Ui)per Silurian. 



Locality, Rescue Harbor. 



