APPENDIX. 



1. The first twenty -four pages, as noticed in the Preface, were 

 reprinted in 1865, with the following alterations. On page 3 the parts in 

 brackets in the reprint consist of new matter. On pages 4, 5, a new 

 species (Archeocyathus profundus) is instituted for the specimens from 

 Anse au Loup, originally referred to A. Minganensis. On page 8, Ku- 

 torgina is inserted in the name of Obolella dngulata. Page 11, Olenellus 

 is adopted instead of Paradoxides. The notes on pages 10, 11, 12, of the 

 original are withdrawn. 



Pages 57 to 72 have been also reprinted, from 57 to 66 inclusive, and 

 part of 67 being entirely new matter. 



2. Stricklandia. As this generic name is preoccupied, I have changed 

 it to Stricklandinia. (See Can. GreoL, vol. viii, p. 370.) The two 

 species (ante, p. 85) must therefore be called Stricklandinia Arachne 

 and Stricklandinia Arethusa. I have still some doubts as to the generic 

 affinities of these fossils ; but so far as their internal structure can be made 

 out, they appear to be more nearly related to this genus than to any other. 

 They are also allied to Camerella. 



3. Fossils from the Black Hills. MEEK and HAYDEN have re-described 

 the fossils from these localities (ante, p. 58) under the name of Linguler 

 pis pinniformis (Owen), Lingulepis prima (Conrad), Obolella nana, 

 Theca gregarea, Agraulos Oweni, and Agraulos? ? (Palaeontology 

 of the Upper Missouri, by F. B. MEEK and F. V. HAYDEN ; published by 

 the Smithsonian Institution, April, 1865. 



4. Fauna of the Levis Formation. The number of graptolites is put 

 down at 53 species (ante, p. 62), but this includes G-. Milesi and 6r. 

 secalinus, which have not yet been found in rocks clearly identified with the 

 Levis formation. The correct number (51 species) is given on p. 376, 

 and also in the foregoing list, p. 417. There are also five species of 

 Asaphm instead of four, as mentioned on pp. 62, 63 the total number 

 of trilobites being 74, of which 73 are described. There are also 29 

 species of Brachiopoda. As to the total number of species of all orders, 

 in this formation, I am satisfied that we are still far from the truth. 

 Every new locality furnishes several new forms. I have stated (ante, pp. 

 62, 376) that there are 219 described species ; but as several of these 

 are doubtfully identified, it would be better to say that there are between 

 215 and 220. 



