279 



by Mr. W. F. Ellis, at Cumshewa Inlet, and lent to the writer by the 

 Natural History Society of British Columl)ia. On the outer volution 

 of this specimen there are eight or nine narrow and somewhat distant, 

 flexuous constrictions, or narrow grooves, but there is a broad space near 

 the aperture upon which these constrictions are obsolete. Between 

 the constrictions there are about five narrow linear ribs, most of which 

 bifurcate or doubly bifurcate at a short distance from the umbilical 

 margin. The other four specimens were collected by Dr. Newcombe, 

 at Cumshewa Inlet, in 1895. One of these measures about four 

 inches and a half in its maximum diameter and is the largest speci- 

 men that the writer has seen. On the interior half of its outer volution 

 the periodic constrictions or arrest of growth are undeveloped or obsolete. 

 The transverse ribs on the outer volution of this specimen too, are not 

 thin and sharp, but comparatively broad, and flattened at their sum- 

 mits, on and near the periphery or venter, especially near the aperture. 

 The sutural line of the species is still unknown. 



HoPLiTEs Haidaquensis. 



Hoplites Haidaquensis, Whiteaves. — 1893. Canad. Rec. Sc, vol. vi, p. 444, pi. 7, 



figs. 2, & 2, a-h. 



"Shell small, sti'ongly costate and widely umbilicated, the umbilicus, as 

 measured from suture to suture, occupying about one-third of the entire 

 diameter. Volutions about three, though the nucleus is not preserved in 

 the only specimen collected, increasing rather rapidly in size and slightly 

 embracing : the outer one moderately convex, a little broader than high, 

 the outline of a transverse section being subpentagonal if made through 

 one of the ribs, or not far from circular if in the centre of one of the 

 grooves between them : aperture nearly circular but shallowly emargi- 

 nate by the encroachment of the preceding volution. 



"Surface marked by large and prominent, simple and nearly straight, 

 transverse ribs, which are separated by rather broad concave grooves. 

 The ribs, which are equal in lengtii, are most elevated on the outer or 

 peripheral portion of the last volution, and in the median line of the peri- 

 phery there is a single angular notch on each rib which scarcely inter- 

 rupts the continuity of the rib. 



" Sutural line not clearly defined, but apparently not very complicated 

 nor much branched. The first and second lateral saddles appear to be 

 much broader than high, and doubly incised rather than ramose at the 

 summits. The first lateral lobe seems to be trifurcate above and unusu- 

 ally small, though apparently much larger than any of the others except 

 the siphonal lobe. 



