369 



The Vancouver specimens may be thus described. Shell small, turbi- 

 nate, about as high as broad, with a moderately elevated spire and a 

 rather narrow but deep umbilicus. Volutions about six, those of the 

 spire convex, the later ones slightly flattened downward next to the suture, 

 above ; the outer one ventricose, but distinctly flattened or even shallowly 

 concave above, rather higher than the spire, as viewed dorsally, um- 

 bilicus occupying about one third of the diameter of the base, with a 

 minutely angulated and cre'nulated margin ; aperture apparently nearly 

 circular, lip thin and simple. 



Surface marked by numerous, close-set, flattened and obliquely trans- 

 verse costa*, that are ci'ossed by equally or still more minute, and close-set 

 spiral ridges. 



An average specimen is six millimetres broad, and about as high as 

 broad. 



A few specimens of this shell were collected quite recently (in 1901) by 

 the Rev. G. AV. Taylor, at Brennan Creek, V.I., and by Mr. Harvey, on 

 the Nanaimo River. These agree much better with Schmidt's than with 

 Stoliczka's figures of S. radiatula. In the latter the volutions are repre- 

 sented as regularly rounded, and not at all flattened next to the suture. 

 Stoliczka, also, says that .S'. radiatula is " composed of about seven or eight 

 convex volution^s," but in the Vancouver Island specimens there are 

 apparently not more than six. 



The specimen figured, though the most perfect one that has yet been 

 obtained, is abnormally depressed. All the other specimens are more 

 elevated, and show the flattening at the suture more distinctly. 



PhaNETA (?) DECORATA. (N. Sp.) 



Plate 45. figs. 6, 6 a, and 7. 



Shell rather small, spiral, wider than high, gently convex and some- 

 what dome-shaped above, angular and carinate at the periphery, and some- 

 what flattened at the Vjase below. Volutions two and a half or three, 

 rapidly expanding and strongly embracing ; spire short, low, obtuse, 

 partially overlapped by the upper part of the outer volution, and not 

 raised above its highest level ; suture indistinct. Outer volution encircled 

 by a narrow, entire and simple spiral keel or keel-like fold ; aperture very 

 large, occupying the greater part of the base, nearly circularj but with 

 the continuity of the peristome apparently slightly interrupted by the 

 encroachment of the preceding volution, though this feature is not well 

 seen in either of the few specimens collected ; outer lip simple. 



