DEFRANCIA. 369 



yellowish-white, variegated by reddish-brown lines which 

 wholly or partially decorate the spiral striae ; apex orange or 

 purple : spire rather long ; apex shaped as in the last species : 

 whorls 8-9, rather convex ; the last occupies three-fifths of 

 the shell : suture deep : mouth pear-shaped, angulated above, 

 and contracted ; length nearly half that of the shell : canal 

 rather short, moderately open, and turning to the left ; notch 

 obliquely rounded, and somewhat distinct : outer lip curved ; 

 inside thickened, and furrowed or toothed, the uppermost and 

 lowermost teeth being the largest ; edge sharp, crenellated by 

 the spiral striae : fissure as in the last species : inner lip slight 

 and retired: pillar long and flexuous. L. 0*35. B. 0*175. 



Yar. cequalis. Body white, microscopically frosted : pallial 

 tube rather short and wide : tentacles of moderate length above 

 the eye-stalks, compressed on the upper and under sides : eyes 

 proportionally large, black, placed on longish stalks : foot 

 leaf-shaped, indented in front, with angular corners, broad 

 and expanded towards the sides, and obtuse-angled behind. 

 Shell broader than the typical form, with the whorls more 

 rounded ; ribs more numerous, and not so prominent or rug- 

 ged ; spiral striae closer and finer ; apex yellowish-white ; 

 coloured lines regularly distributed, and of a paler hue ; in 

 some specimens these markings are very faint or altogether 

 wanting. L. 0*5. B. 0-225. Mangclia linearis, vars. inter- 

 media and pallida, F. & H. iii. pp. 471, 472. 



Habitat : Laminarian, coralline, and deep-water 

 zones, on all our southern coasts, and occasionally also 

 in the north. The distribution of the variety, which is 

 equally common, is the reverse of this. Fossil in Ire- 

 land (J. Smith); post-glacial bed in Norway, 0-100 feet 

 (Sars); Italian tertiaries (Philippi and Calcara). The 

 typical form and the variety have an extensive range 

 throughout the north Atlantic, from Iceland (Steen- 

 strup) and Finmark (Sars) to Madeira and the Canaries 

 (M f Andrew), as well as in the Mediterranean, Adriatic, 

 and iEgean ; depths 8-70 f. 



The animal is sluggish ; it has the same habit of float- 

 ing as its smaller congeners. The spawn-cases are se- 

 ll 5 



