98 MALACOZOA. GASTEROPODA. PULMOBRANCHIATA, 



franulate, with a median groove ; the upper tentacula mo- 

 erately long, cylindrical-clavate, dusky, with the tip paler, 

 the eyes black ; the lower tentacula very small, pale-grey. In 

 walking it drags the shell after it, but now and then jerks it 

 forwards, raising it obliquely. Its motions are rather slow. 



Young individuals have the peristome thin, the mouth 

 much shorter. The colour varies in tint, some shells being 

 partially reddish or whitish ; some pale-grey, with streaks of 

 white ; some nearly opaque. 



Common among moss and fine grass, or under stones, in 

 the three counties, more especially along the coast, as at Stone- 

 haven, Aberdeen, Cruden Bay, the Bullers of Buchan, Peter- 

 head, Auchmedden, Gamrie, and Banff; but also extending 

 into the interior as far as the Highland glens. 



Helix lubrica. Mont. Test. Brit. 390. PI. 22. f. 6. Helix lu- 

 brica. Muller. Verm. Terrestr. et Aquat. ii. 104. Bulimus lubri- 

 cus. Drap. Moll. 75. PI. 4. f. 24. Bulimus lubricus. Flem. Brit. 

 Anim. 265. Helix lubrica. Mont. Test. Brit. 390. Helix sub- 

 cylindrica. Linn. Syst. Nat. i. 1248. Zua lubrica. Gray's Turt. 

 188. Bulimus lubricus. Lamk. Syst. Ed. 2. viii. 237. 

 2. Bulimus obscurus. Lustreless Bulimus. 



Shell ovato-oblong, slightly glossed, semitransparent, of 

 six moderately convex whorls, which are faintly and ir- 

 regularly striate, and distinctly separated by the well-marked 

 suture ; the apex blunt ; the mouth subovate, with the peri- 

 stome somewhat thickened, and spread, the inner lip leaving 

 the narrow umbilicus apparent ; the colour dull yellowish- 

 brown, the inside of the lip white. Length five-twelfths of 

 an inch, breadth little more than a third of the height. 



The animal has the neck compressed, rounded above, longi- 

 tudinally striate, transversely rugose ; the upper tentacula long, 

 slender, cylindrical, terminated by a large knob ; the lower 

 very short, clavate ; the mouth with two large lips ; the foot 

 oblong, compressed, transversely rugose, pale grey beneath, 

 on the margin transversely rugose and spotted with brown, 

 its sides above pale-grey with five longitudinal rows of brown 

 tubercles. It crawls with considerable speed, carrying the 

 shell inclined at an angle of about 50, and directed back- 

 wards a little to the right. When at rest, the shell is directed 

 at an angle of 45. 



First found by Mr. James Duncan, while with me on an ex- 

 cursion among the ruins of Dunnottar Castle. The specimen 

 obtained by him, and which he politely presented to me, I 

 kept alive for some time, in order to observe its habits. 



