MALACOZOA. GASTEROPODA. TECTIBRANCHIATA. 189 



it having been accidentally in company with a shell sent to him 

 for inspection. 



Bulla Cranchii. Flem. Brit. Anim. 292. 



2. Bulla Candida. Glossy Bulla. 



Shell broadly ovate, thin, semitransparent, glossy, with faint 

 growth-lines; "the apex prominulous, obtuse, two very small 

 volutions being apparent, but with a slight scrobiculus ; the 

 aperture wide, ovato-oblong, acute behind, the columellar 

 margin a little thickened and reflexed, the outer margin thin ; 

 the colour white. Length two-eighths, breadth more than 

 half the length. 



Found by me in shell sand from the beach near Aberdeen. 



Diaphana Candida. Brown, Illustr. PI. 38. f. 13, 14. 



Genus 3. Halia. 



Shell subovate, spiral ; the spire short, convex, ob- 

 tuse ; the turns rapidly enlarging, separated by an im- 

 pressed suture, the last very large, tumid ; the aperture 

 large subovato-trigonal, acute behind, anteriorly curved 

 outwards and ending in a rather wide notch, the outer 

 lip thin, the inner formed by the thin-edged sinuous 

 columella before, without peristome or umbilicus. 



This genus, instituted by Risso, is correctly placed 

 by him in the family of "Aceres," and between the 

 genera Bullina and Acera. But its affinities, one might 

 at first think, to be most obviously among the Bucci- 

 nina and Fusina. The form of the mouth is, in fact, 

 almost the same as that of a young, thin-lipped Bucci- 

 num undatum of the same size. 



1. Halia Flemingidna. Fleming's Halia. 

 Shell subovate, thin, brittle, glossy, semitransparent ; of four 

 turns, which are convex, obsoletely striated longitudinally and 

 transversely ; the apex very obtuse ; the suture distinct ; the 

 aperture two-thirds of the whole length, subovato-trigonal, 

 acute behind, the thin-edged outer lip forming the fourth of a 

 circle, the inner side sinuous, its posterior half formed by the 

 body-whorl, the anterior by the thin fiexuous edge of the colu- 

 mella, the anterior extremity curved to the left in the form of 

 a short and rather wide canal ; the colour pure white. Length 

 geyen-twelfths of an inch, breadth half the length. 



