391 



the Upper Missouri Cretaceous,* though all three seem to the writer 

 to be more probably referable to Yoldiella or Fortlandia. 



Pectunculus Veatchii, Gabb. (Sp.) 



Plate 47, tigs 3 and 4. 



Axincea Veatchii, Gabb. 1864. Geol. Surv. Calif. Palaeont., vol. i, p. 197, pi. 25, figs. 

 183 and 183 a. 

 " " Whiteaves. 1879. This volume, pt. 2, p. 162. 



Pectunculus Veatchii, Stanton. 1896. U. S. Geol. Survey, 17th Annual Rep., pt. 1, 

 pp. 1029 and 1039. 



This is one of the commonest lamellibranchiate bivalves of the Vancou- 

 ver Cretaceous. The writer has examined and studied specimens of it 

 from the following localities, the collector's name and date at which the 

 collections were made being added in parentheses. Vancouver Island : 

 at Blunden Point and the entrance to Departure Bay (J. Richardson, 

 1872); at North West Bay (J. Richardson, 1872, and W. Harvey, 1897); 

 from the roof of the coal at the Nanaimo mines, and ten to twelve miles 

 up the Nanaimo River (W. Harvey, 1901) ; and at Brennan Creek, near 

 Wellington (Rev. G. W. Taylor, 1901). Hornby Island (J. Richardson, 

 1871) ; Sucia Islands (J. Richardson, 1874, and Dr. Newcombe, 1894); 

 and Texada Island (W. Harvey, 1901). All the specimens of this shell 

 that were collected by Mr. Richardson were referred to Axina^a Veatchii, 

 Gabb, by the writer, on page 162 of the second part of this volume. On 

 the other hand. Dr. C. A. White, in 1889, identifies specimens from 

 Sucia Island with Axincea sagittata, Gabb, though with a query, as he (Dr. 

 White) states that " none of them show the peculiar sagittate markings 

 which suggested the name."f 



The outer surface of the specimens from Texada Island is remarkably 

 well preserved, and the finest surface markings are well shewn. These 

 latter, when viewed with a lens, to the writer's surprise were seen to 

 consist of a close, regular and very minute cancellation or network, con- 

 sisting of densely crowded minute radiating raised lines, or low ridges 

 with impressed lines between them, which are crossed by equally numerous, 

 close set and minute, concentric raised lines, as represented by figure 4 

 on Plate 47. On a re-examination of the specimens collected long ago 

 by Mr. Richardson, it was found that in all of those from Vancouver 

 Island the surface is much worn and the finer markings obliterated, but 

 that in the small specimens from the Sucia Islands the minute details 

 of sculpture are well preserved. 



* See Report U. S. Geological Survey of the Territories, vol. ix, pp. 109 and 112, and 

 Plates 2 and 15. 



fBulletin of the United States Geological Survey, No. 51, p. 39. 

 6i — M, F. 



