^40 THE CANADIAN NATURALIST. [Vol. vii. 



The surface is covered with tubercles of various sizes up to 2 

 lines in width in the largest specimens. The space between the 

 2 cones is nearly smooth. 



There are about a dozen specimens of the frontal lobe in the 

 (Collection, and they vary from a length of 9 lines up to 3 inches. 



Occurs in the Corniferous. 



CHANGES OF NOMENCLATURE. 



In 1860-1861, I described, in the Canadian Journal, a num- 

 l)er of species of Devonian fossils, which appeared to be new. 

 During the thirteen years that have elapsed, many changes have 

 4aken place in palseontological nomenclature, and several of the 

 names then adopted must be changed. 



1. — Athi/ris Clara, also described by Prof. Hall under the 

 name of Mtristella elissa. I am informed that this species has 

 been long understood to be Atnjpa nasuta, Conrad, although it 

 -was not recognized as such by Prof. Hall in 1860. If it is 

 truly Conrad's species it should be called Athyrls nasuta. 



2. — Rliynchonella ? Laura, published Ma^^ 1860, is the same 

 as Prof. Hall's Leiorhynchus multicosta of a later date. See Am. 

 Jour. Sci. 2d Ser. vol. 31, p. 293. Our species may be called 

 Jjeiorhynchus Laura. 



3. — Stricld andlnia elongata, may be changed to AmpTiigenla 

 ■elongata. 



4. — Strop1io7nena incequistriata is S. inequiradlata , according 

 to Prof. Hall. 



4. — Favosites hasaltica. When Goldfuss published this species 

 he figured three specimens : 

 Aa — From Lake Erie. 46 — from Gothland. 4:C&d — fromEifel. 



These represent, cither two, or three species. The specific 

 name can only be retained for one of these species. The ques- 

 tion to be decided is "which of them " ? 



Lonsdale and McCoy, have expressed the opinion, that the 

 specimen (c, d), from the Eifel, is F. Gotldandlca. Prof. H. A. 

 Nicholson, says in reference to this opinion, that ''it is probable." 

 — (Canadian Journal, 1873 ?) 



Supposing these three authors, to be correct in this view — then 

 (c, d) must be referred to F. Gotldandlca, and the name, F. 

 hasaltica, retained for either one or both of the others. 



The specimen figured by me as F. hasaltica, is of the same 

 species as 4a. 



Published March 30th, 1874. 



