82 J. F WHITEAVES ON THE 
Upper Neocomian, were discovered by Dr. G. M. Dawson in 1875 at Tatlayoco Lake. This 
lake, it may be mentioned, empties itself into the Homathco River, which in its turn flows 
into Bute Inlet. Two years later, rocks holding a similar assemblage of fossils, of which 
good collections were made, were observed by Dr. Dawson on the head waters of 
the Skagit River, and at three or four localities in the lower part of the valley of the 
Fraser. Lastly, in 1878, a small series of fossils, from rocks of apparently the same geo- 
logical horizon, was collected by Dr. Dawson at Forward Inlet, Quatsino Sound, on the 
N. W. coast of Vancouver Island. The following is a complete list of all the species 
obtained at these localities, with descriptions of three that are believed to be new to 
science :— 
BELEMNITES IMPRESSUS, Gabb. 
Tatlayoco Lake, rare and badly preserved. Skagit River, frequent but fragmentary 
and in poor condition. North slope of Jackass Mountain, one characteristic fragment. 
OLCOSTEPHANUS QUATSINOENSIS, Noy. Sp. 

Fic. 1. OLCOSTEPHANUS QUATSINOENSIS. 
Shell discoidal, sides compressed, periphery narrowly rounded ; umbilicus somewhat 
small, rather more than one-fourth the entire diameter. Outline of aperture narrowly 
ovate elliptical, apart from the rather deep emargination caused by the encroachment of the 
preceding whorl. Surface marked with fine, transverse and flexuous bi-dichotomous ribs. 
Septum unknown. Diameter, twenty lines; maximum thickness rather more than four 
lines ; width of umbilicus, six lines. 
Forward Inlet, Quatsino Sound. A single well preserved but imperfect specimen. 
This species rather strongly resembles the Ammonites (Olcostephanus) bidichotomus of 
Leymerie, from the Lower Neocomian of France and Switzerland, especially in its sculp- 
ture, but may be readily distinguished from that shell by its flatter sides, narrower 
umbilicus and finer ribs. 
ANCYLOCERAS PERCOSTATUS, Gabb. 
North slope of Jackass Mountain. One very large but imperfect example. 
ANCYLOCERAS REMONDI, Gabb. 
West side of the Fraser River, below Lytton and opposite Boston Bar. One specimen, 
collected by — Keefer, Esq. Loose and probably drifted down the stream from a locality 
‘me ‘Yi 
