wHiTEAVES. FOSSILS "OF TBIASSIO ROOKS OF BRITISH COLUMBIA. 147 



simple keel bordered on each side by a faint linear channel, and the 

 abruptly terminating ribs on the outer volutions," 



The type of Arniotites Vancouverensis as here defined was collected 

 by Dr. Dawson in 1878, at Crescent Inlet, Moresby Island, Q. C. I., 

 and six imperfect specimens, which are believed by the present writer 

 to be referable to the same species, were obtained by Dr. Dawson in 

 the same yeai- at Foi-ward Inlet, on the north-west coast of Vancouver 

 Island, near Observatory Eock. 



Arniotites. (Species uncertain.) 



Plate 19, fig. 3. 



Celtites (?) Vancouverensis, Whiteaves. (Pars.) 1887. Op. cit., p. 110 B. 



Six natural moulds of the exterior of one side of each shell of a 

 species of Arniotites and two small and crushed fragments of casts of 

 the interior of the test were collected by Dr. Dawson in 1885, at Eob- 

 son Island, in Forward Inlet. These were supposed by the present 

 writer to represent merely an advanced stage of growth of the pre- 

 cpding species. Professor Hyatt, however, who has examined the 

 most perfect specimen from this locality, the one figured on plate 19, is 

 of the opinion that its " whorls are proportionately broader, in an 

 abdomino-dorsal direction, than those of A. Vancouverensis, that the 

 pilse of the former are more numerous and not so coarse and fold-like, 

 and that they begin to be developed earlier, the young being smooth 

 for a much shorter time than those of A. Vancouverensis." To the 

 writer the pilas of the typical A. Vancouverensis seem finer and closer 

 together than those of the specimens from Eobson Island. 



Arniotites or Celtites. (Species uncertain.) 



Plate 19, flg. 4. 



The large specimen from Forward Inlet, figured on plate 19, 

 Professor Hyatt thinks may be "either an Arniotites or a Celtites. 

 The numerous, narrow-sided, compressed whorls, entire keel, crowded 

 pilffi (ribs) and disooidal form are very similar, possibly identical, with 

 those of Celtites Epolenensis, Mojsisovics, figured from smaller speci- 

 mens in Mediter. Triaspr., pi. 29, 38. The last part of the last whorl 

 in the specimen collected by Dr. Dawson is curiously distorted by 



