/ 



286 Mr. E. A. Smith on six new 



and exhibits none of the distortion which is so conspicuous 

 in P. cernua. Within the stem a very delicate ringed or 



spiral structure is visible. 



EXPLANATION OF PLATE XV. 



Fig. 1. Sertularella quadrieornuta, n. sp. la. Gonothecae. 



Fig. 2. Flustra solida, Stimpson, nat. size. 



Fig. 3. Flustra solida, zocecia, magnified. 



Figs. 4, 5. Phylactella (?) grandis, n. sp. 5a. Oceciuni. 



Fig. 6. Eschara (auctt.) glabra, n. sp. 



Fig. 7. Mucronetta simplex, n. sp. 



Fig. 8. Alcyonidium excavatum, n. sp. 



Fig. 9. Alcyonidium excavatum, showing the concave side. 



Figs. 10, li. Arachiidium simplex, n. sp. 



Figs. 12, 13. Barentsia bulbosa, n. sp. Two of the erect steins, highly 



magnified. 

 Fig. 14. Barentsia bidbosa : a single peduncle and polypide. 



XXXIV. — Descriptions of six new Species of Shells jrom 

 Vancouver Island. By Edgar A. Smith. 



The forms here described form part of a collection recently 

 obtained by the British Museum. 



Pleurotoma Vancouver ensis. 



Shell fusiform, white. Whorls about eight in number, a 

 trifle concave at the upper part, bulging beneath, cancellated 

 with longitudinal fine costse and spiral ridges, the points of 

 intersection being somewhat nodulous. Spiral ridges or liras 

 about six or seven on a whorl, whereof the three uppermost 

 are finest. Beneath these comes one rather stouter, which 

 is again succeeded by two still coarser at the bulging part of 

 the volutions ; and another finer one is visible on some of the 

 lower whorls adjacent to the suture. The costse are flexuous, 

 first bearing to the right and then to the left, and are thicker 

 at the lower part or upon the stout transverse liree, the nodules 

 here being also coarser than those above. Last whorl con- 

 tracted below the middle and shortly caudate, encircled with 

 spiral ridges to the extremity, which are scarcely affected by 

 the longitudinal ribs beyond the middle. Aperture less than 

 half the entire length. Labrum thin, broadly notched beneath 

 the suture, arcuate and prominent below the incision. Colu- 

 mella a little oblique, smooth, scarcely tortuous. Canal nar- 

 rowish, moderately short. Length 11| millims., diam. 4. 



The absence of colour and the peculiarity of its sculpture 

 will distinguish this pretty form. 



