APPENDIX IV. 335 



(P) In a yellowish-gray dolomitic limestone: 



CEPHALOPODA. 



1. Actinoceras Tceewaiinense, Whiteaves. Several siphuncles of 

 this species recently described by Dr. Whiteaves occur in the 

 collections from Southampton island. 



($) Collections of Stromatoporoids from Southampton Island: 

 Sixty-three microscopic sections have been submitted to a pre- 

 liminary examination, and the following- species among 

 others, appear to occur: 



1. Clathrodictyon regulare, Rosen. 



2. fastigiatum, Nicholson. 



3. sp., cf. C. striatellum, Nicholson. 



4. " ( ?) crassum. Nicholson. 



Some of these are parasitic on Favosites Gothlandicus, Lamarck. 

 They are referable to the Silurian, about the age of the Niagara. 



PRELIMINARY LIST OF ORGANIC REMAINS FROM LOOSE BLOCKS OF LIME- 

 STONE, CAPE CHIDLEY. 



From the drab-coloured limestone: 



POLYZOA. 



1. Pacliydictya, sp. indt. 



BRACHIOPODA. 



2. A strophomenoid shell with sculpture of Strophomena vari- 



striata type occurs in the collection with Siebereila galeata. 



3. Trematospira, sp. indt. 



4. Conchidium decussatum, Whiteaves. 



5. Clorinda, sp. probably a new form which I would designate, 



Clorinda lowi, N. Sp. 



6. Siebereila galeata, Dalman. A form which is very near the type 



of this cosmopolitan species. If it prove a variety or muta- 

 tion, I should designate the same as var. Chidleyensis, N. vav. 



The above are all of Silurian age. 



