154 HELICID^E. 



corresponding variety; and I am inclined to consider 

 them distinct. The species now under consideration 

 differs from 8. putris in the darker colour of its body 

 and the more slender shape of the shell, as well as in 

 its longer and more pointed spire. It forms a passage 

 through its second variety from the last to the next 

 species. 



It is the S. Pfeifferi of Rossmassler, as well as the 

 8. gracilis of Alder, but not of Lea. M. Bourguignat 

 has ascertained, by a recent examination of Risso's col- 

 lection, that it is the present species which the celebrated 

 naturalist of Nice described as 8. elegans ; and his de- 

 scription sufficiently corresponds with that of Ross- 

 massler. 



3. S. OBLON'GA*, Draparnaud. 



S. oblonga, Drap. Hist. Moll. p. 59, pi. iii. f. 24,25 ; F. & H. iv. p. 137, 

 pi. cxxxi. f. 6, 7. 



BODY short, brown or grey of different shades, with some- 

 times minute black spots, finely shagreened : tentacles rather 

 short; upper pair scarcely inflated at their tips: foot short and 

 rather broad, bluntly pointed behind. 



SHELL oblong-oval, rather solid, moderately glossy, brownish 

 or reddish-yellow, with sometimes a greenish hue, rather 

 strongly but irregularly striate by the lines of growth, but 

 devoid of any other sculpture : epidermis thick : whorls 3-4, 

 convex, the last occupying about two-thirds of the shell : spire 

 prominent, but abrupt and blunt at the point : suture oblique 

 and very deep : mouth roundish-oval : outer lip rather thick, 

 considerably incurved on the columella : inner lip slightly re- 

 flected. L. 0-25. B. 0-175. 



HABITAT : Dry ditches, chiefly near the sea-coast. It 

 is a very local species in this country. I have found it 

 among the sand-hills on Crymlyn Burrows near Swan- 

 sea, and in a similar situation on Braunton Burrows 



* Oblong. 



