MALACOZOA. GASTEROPODA. PULMOBRANCHIATA. 99 



Helix obscura. Muller. Venn. Terrestr. et Aquat. ii. 103. 

 Helix obscura. Mont. Test. Brit. 391. PL 22. f. 5. Bulimus 

 obscurus. Drap. Moll. 74. PL 4. f. 23. Bulimus obscurus. 

 Gray's Turton. 183. Bulimus hordeaceus. Lamk. Syst. Ed. 2. 

 viii. 236. Bulimus obscurus. Flem. Brit. Anim. 265. 



GENUS 7. PUPA. CHRYSALIS-SNAIL. 



Animal with the body elongated, spiral ; the head 

 with four tentacula, of which the upper are long, the 

 lower short, all clavate ; the foot small, elongated. 



Shell oblongo-cylindrical, spirate, thin, with the apex 

 obtuse, the last whorl not proportionally much larger ; 

 the mouth semioval, with the peristome incomplete, 

 thickened, and reflexed. 



The Pupae, so named from their fancied resemblance 

 to chrysalids, dolls or puppets, are similar in their habits 

 to the Bulimi : they feed on vegetable substances, reside 

 among moss or herbage, or under stones ; remain inert 

 in continued drought ; and search for food at night, or 

 when the grass is moist. 



1. Pupa umbilicata. Umbilicated Chrysalis- Snail. 



Shell oblongo-cylindrical, glossy, with six moderately con- 

 vex turns, which are transversely striated and distinctly se- 

 parated by the suture ; the aperture semiovate, subangulate, 

 with the peristome thick, reflexed, and flattened; a single 

 laminar tooth in the angle formed by the junction of the outer 

 lip ; the umbilicus narrow ; the colour dark-olive, the peri- 

 stome pale yellowish-grey, or tinged with reddish. Length 

 two-twelfths of an inch, breadth about half the length. 



The animal has the foot oblongo-elliptical, greyish-white : 

 the neck and tentacula blackish-grey, the f eyes black. It 

 moves slowly, bearing the shell at an angle of about 15 degrees. 



Very common, among moss, under stones, in the fissures 

 of walls, along the coast, and in the interior, in dry and moist, 

 sunny and shaded places. 



Turbo muscorum. Mont. Test. Brit. 335. PL 22. f. 3. Pupa 

 umbilicata. Drap. Moll. Terr, et Fluv. 62. PL 3. f. 39, 40. Pupa 

 umbilicata. Lamk. Syst. Ed. n. viii. 179. Pupa umbilicata. 

 Gray's Turton, 193. Pupa muscorum. Flem. Brit. Anim. 268. 



2. Pupa margindta. Margined Chrysalis-Snail. 

 Shell oblongo-cylindrical, slightly glossy, with six little-con- 



