399 



ting and divaricating folds. The other two are very small right valves 

 from essentially the same locality, one labelled "No. 22, Inoceramus 

 mytilojjsis" and the other " Isocardium." Both have the prominent 

 umbo characteristic of /. Vancouverensis, and the latter evidently corres- 

 ponds to the latter part of the entry, "Also JVautilus and Incardium " (a 

 typographical error for Isocardium), after No. 29 in the list of specimens 

 on page 243 of Captain Palliser's report. 



The right valve from the Sucia Islands referred to /. Sagensis, var. 

 Nebrascen^is, on page 172 of the second part of this volume, is a broad 

 variety of /. Vancouverensis. 



In 1871-75, specimens of this species were collected by Mr. Richardson 

 two miles and a-half up the Nanaimo River, V. I., at Protection, Salt 

 Spring (or Admiralty), Saturna, and the Sucia Islands; also in 1901, by 

 Mr. Harvey, at Yorke's Farm, two miles and a quarter to two miles and 

 a half up the Nanaimo River. 



Pecten Traskii, Gabb. 



Pccten Traskii, Gabb. 1864. Geol. Surv. of Calif., Palseont., vol. i, p. 200, pi. 26, fig. 

 187 ; and (1869) vol. ii, p. 198, pi. 32, fig. 95. 



Texada Island, W. Harvey, 1901 : one small lower valve. 

 Lima Suciensis. (N. Sp.) 



Plate 51, fig. 2. 



Shell small, moderately convex but slightly compressed, obliquely sub- 

 ovate, posterior side somewhat produced below, larger and more narrowly 

 rounded than the anterior ; beaks incurved, ears small. 



Surface markings consisting of small, narrow, radiating ribs, that are 

 everywhere crossed by concentric striae or lines of growth. From eleven 

 to fourteen of these ribs are a little larger than the rest, and in testiferous 

 specimens the spaces between them, when examined with a lens, are seen 

 to be occupied by from four to six low and close-set, minute, radiating 

 ridges. Characters of the interior of the valves unknown. 



Sucia Islands, Dr. C. F. Newcombe, 1876 : three casts of the interior 

 of both valves. Extension mine, near Nanaimo, W. Harvey, 1901 : a 

 cast of a left valve. Texada Island, W. Harvey, 1901 : an imperfect 

 but testiferous left valve. The largest of these is less than one inch in 

 its greatest diameter. 



