264 



former one is a coral, three are brachiopods, one is a crustacean, and the 

 rest are inollusca proper. The cephalopoda are much more numerous, 

 both in species and in individuals, than the gasteropoda, and the ammo- 

 nitidse are specially abundant. The latter would seem to be remarkable 

 for the presence of several species of Desmoceras (inclusive of Puzozia), 

 and for the absence of Baculites, and of the numerous species of Pachy- 

 discus which are so characteristic of the Vancouver Cretaceous. The 

 number of species of pelecypoda appears to be much larger, even, than 

 that of the cephalopoda. No new information has been obtained about 

 the fossils of Subdivisions A, B, D, or E, of Dr. G. M. Dawson's section. 



The progress of palseontological research during the fourteen years 

 that have elapsed since the third part of this volume was written, has 

 necessitated some alterations in the nomenclature of the genera and 

 species described or identified therein. Thus, on page 205 of that part, 

 an Ammonite which is very abundant at Cumshewa Inlet was identified 

 with the Ammonites Beiidanti of d'Orbigny and Stoliczka, — and placed in 

 the genus Hajdoceras on the authority of Dr. Neumayr, in his paper 

 " Ueber Kreideammonitiden" in the Transactions of the Royal Academy 

 of Sciences of Vienna for 1875. Since then, however, Zittel has placed 

 A. Beudanti in his genus Desmoceras, and still more recently, Dr. Franz 

 Kossmat (who refers it to Puzozia, which he regards as a subgenus of 

 DesTnoceras) claims that several species have bpeu confounded under the 

 name A7nryionites Ben,danti, and that the Cumshewa specimens are not 

 exactly like any of them.. It has therefore seemed most prudent to dis- 

 tinguish the Cumshewa Desmoceras (or Puzozia) by a different specific 

 name. 



On page 234 of the same part, specimens of an ^rca-like shell from 

 Maud Island are designated '^ Netnodon Fischeri, d'Orbigny, (Sp.)". 

 Their hinge dentition was supposed to be like that of Conrad's genus 

 Nemodon, and their specific identification was based partly on their great 

 similarity to d'Orbigny's figures of Area concinna (a name that was found 

 to be preoccupied and changed to A. Fischeri) ; and partly on the 

 fact that Eichwald held that the beds holding Area Fischeri and Aucella 

 Mosqiiensis are of Neocomian rather than of Jurassic age. In the most 

 recent Russian geological publications, however, these beds are i*egarded 

 as "Oxfordien ", and the identification of the Maud Island Area, with a 

 Russian Jurassic species would seem to be no longer tenable. 



Among the Ammonites from the " Lower Shales", collected by Mr. 

 Richardson in 1872, there are a few species that seemed to have such a 

 Jurassic aspect, that three of them were referred to the Jurassic genus 

 Stephanoceras, and two to Perisphinctes, which is almost exclusively 

 Jurassic. But, in the present state of our knowledge of the Cretaceous 

 Ammonitidpe, these resemblances would seem to be more apparent than 



