286 



Placenticcras Pcrezianum, Whiteaves. 1889. Contr. Canad. Palseont., vol. 1, pt. 2, p. 156. 

 Desvioceras Perczianum, Whiteaves. 1893. Trans. Royal Soc. Canada for 1892, vol. x, 

 sect. 4, p. 114. 



Skidegate Channel, west of Alliford Bay, J. Richardson, 1872; South 

 Island (in Skidegate Channel) and north shore of Cumshewa Inlet, Dr. 

 G. M. Dawson, 1878 : the specimens referred to on pages 19 and 204 of 

 this volume. 



This species was referred to Haploceras in 1884 in accordance with 

 Neumayr's classification of the Cretaceous Ammonites, and to Placenti- 

 ceras in 1889, as appearing to agree with Zittel's extended definition of 

 its charactei's in the second volume of the Handbuch der Palpeontologie. 

 It, however, appears to be a fairly typical species of Desmoceras, Zittel, 

 (1884) as that genus is now understood. 



Desmoceras (Puzozia) Dawsoni. (N. Sp.) 

 Plate 37, fig. 3. 



Haploceras BeudxnU, Whiteaves. 1884. This volume, pt. 3, p. 205, pi. 26, figs. 1 and la. 

 But probably not the Ammonites Beiidanti of European authors, 

 nor of Stoliczka. 



Shell resembling that of Puzozia Stoliczkai, Kossmat* (the Ammonites 

 Beudanti of Stoliczka, but not of Brongniart nor D'Orbigny) in shape, 

 septation, and in the large size to which it attains, but diflfering there- 

 from, as pointed out by Dr. Kossmat,f mainly in the circumstance that 

 the periodic constrictions of specimens of from two to three or five or six 

 inches in their maximum diameter, are much more flexuous and sigmoidal. 



Abundant on the north shore of Cumshewa Inlet, where numerous 

 specimens were collected by Dr. G. M. Dawson in 1878 and by Dr. New- 

 combe in 1895. At this locality all the specimens have the umbilical 

 margin rounded, and this would seem to be the typical form of the 

 species. The few specimens from Bear Skin Bay, collected by Dr. Daw- 

 son in 1878, with a rectangular umbilical margin, should probably be 

 regarded as a variety of Desmoceras Dawsoni, for although they very 

 closely resemble the Ammonites Beudanti as figured by Pictet and Cam- 

 piche, it would now seem that more than one species has been described 

 under that name by European writers. 



Db.smockras (Puzozia) Maudense. 



Sphenodiscus Maudensis, Whiteaves. 1884. This volume, pt. 3, p. 200, pi. 22, fig's. 3 

 and 3, a-h. 



Bear Skin Bay, C. F. Newcombe, 1895 : an imperfect and badly pre- 

 served cast of the interior of a shell, about five inches in its maximum 



* Untersuehungen liber die siidindische Kreideformation, pt. 3. (184) 119, pi. (24) 18, 

 fig. 6. 



t Ibid., p. (185) 120. 



