Species of Shells from Vancouver Island. 287 



Sipho angustus. 



Shell fusiform, eroded at the apex, whitish, with a broad 

 obscure brownish band round the middle of the whorls, clothed 

 with a greenish-yellow epidermis. Whorls probably about 

 ten, slightly convex, slowly enlarging, longitudinally plicated, 

 and everywhere finely spirally striated and marked with 

 flexuous lines of growth. Plica? a trifle oblique and arcuate, 

 not particularly raised, broader than the interstices, about 

 eighteen on the penultimate whorl. Last volution rounded 

 at the middle, then contracted and produced into a slender 

 recurved beak ; the plica? upon it become more or less obso- 

 lete below the middle. Aperture, together with the canal, 

 occupying rather less than half the entire length of the shell, 

 light brown within. Outer lip (viewed laterally) broadly 

 sinuated above, and prominently arcuate at the middle. Colu- 

 mella scarcely arched at the centre, and turned obliquely to 

 the left towards the extremity. Length 25 millims., diam. 

 61; aperture with canal 11^ long, 3|- wide. 



This species is remarkable for its slender form, the close 

 spiral striation, and the arcuate plica? or ribs, a feature which 

 is not characteristic of the genus. 



Columbella {Nitidella ?) Dalli. 



Shell fusiformly ovate, yellowish white, reticulated with 

 pale brown, the interstices being of irregular shapes and sizes ; 

 or, in other words, it is pale brown, closely spotted irregularly 

 with yellowish white. Epidermis very thin. Apex eroded. 

 Remaining whorls six, flattish or scarcely convex, smooth, 

 separated by a deep suture, giving the spire a slightly turreted 

 aspect. Last whorl feebly angular at the middle, contracted 

 interiorly, and striated around the extremity. Aperture pale 

 lilac within, occupying about three sevenths of the entire 

 length. Outer lip arcuate, thickened, especially at the upper 

 part, thin at the margin, and armed within the mouth with 

 about seven elongate tubercles. Columella arched above, 

 oblique at the base, with indications of one or two tubercles 

 below the middle, covered with a thin whitish callosity. 

 Basal canal a little recurved. Length 14 millims., diam. 5i ; 

 aperture 6 long, 2| broad. 



This species is broader than C. cribraria, has a less acumi- 

 nate and more turreted spire, and the colour is much paler. 

 The outer lip, too, does not exhibit nearly so distinct a superior 

 sinus ; and the last whorl is more contracted at the base, form- 

 ing more of a distinct basal canal with the lower extremity of 

 the labrum. 



20* 



