265 



real. At any rate, Dr. Kossmat (on page 27 (134) of the second part of 

 his monograph of the Cretaceous Cephalopoda of Southern India) has 

 expressed the opinion that Ammonites Richardsoni (nobis) is an Olcostepha- 

 nus rather than a StephaTioceras. Numerous specimens collected by Dr. 

 Newcombe show that " Stfphanoceras cepoides " (and probably S. chlaf.um) 

 is an Olcostephanus, with much the appearance of a Scaphite. Dr. 

 Kossmat, too, in a letter to the writer, says that he thinks that Ammonites 

 Skidegatensis and A. C arlotteiisis (which the writer had referred to Peri- 

 sphinctes) may possibly be referable to Olcostephanus, and perhaps most 

 nearly related to a Mexican Cretaceous species (0. Zlrkeli) recently de- 

 scribed by Felix and Lenk.* 



In the present paper, also, it has been thought desirable to distinguish by 

 different, and for the most part new, specific names, a few fossils from 

 the Lower Shales that have previously been idemitied with the following 

 Jurassic species from the western United States. f 



Belemnites densus, Meek & Hayden. 

 Pleuromya suhcompressa, Meek. 

 Grmnmatodon inornatns, Meek & 

 Hayden. 



ModioJa siibimbricata. Meek. 

 Oxytoma mucronata, Meek. 

 Grypha'a Nehrascensis, Meek & 

 Havden. 



It has long been obvious that the Lower Shales represent a well-defined 

 horizon in the earlier Cretaceous of the Pacific coast of North America, 

 and it now seems scarcely probable that any of the fossils therefrom can 

 be identical with any of these species. In any case, Dr. Stanton states 

 that the name Pteria (or Oxytom,a) mucronata, Meek, is preoccupied ; 

 and additional specimens of the Modiola from Maud Island, collected 

 by Dr. Newcombe in 1895, show that it is probably distinct from M. 

 suhimbricata. 



Plate 33, which refers exclusively to specimens described or referred 

 to on pages 246-252 of Part III, and which should have accompanied it, 

 is issued herewith. 



In conclusion, the writer desires to express his thanks to the following 

 gentlemen for assistance rendered during the preparation of this paper. 

 To Dr. C. F. Newcombe, and to Mr. John Fannin, Curator of the Provin- 

 cial Museum at Victoria, for the loan of many interesting specimens. 

 To Professor H. Pilsbry, for the loan (for comparison) of the types of 

 Pleuromya paiiyracea, Meekia sella, and Cucidloea truncata, Gabb, 

 from the Museum of the Academy of Natural Science of Philadel- 



*Beitrage zur Geolngie und Palaeontologie der Republik Mexico, theil 3, p. 182, pi. 29. 



|The specimens referred to Astarte Packardi, on page 229 of this volume, have since 

 been described as A. Carlottensi.% on page 154, of volume 1, pt. 2, of " Contribution.<5 to 

 Canadian Paleeontology," published in 1889. 



R— 4 



