SUCCINEA. 93 



grey) and the latter *brun roussatre' (reddish-brown), 

 although I do not attach much importance to that 

 character. Not merely does the intensity of colour 

 vary in many specimens of the same species of land 

 shell, but also the arrangement of the colours." 



Our brother conchologists on the other side of the 

 '* silver streak " are most zealous and painstaking in 

 their researches, but some of them are confirmed 

 species-makers. Perhaps it might be well to leave 

 this form in the place originally assigned to it, and 

 regard it as 5. ptitris van vitrea, for if the points in 

 which it differs from the type are held to be of 

 sufficient importance to warrant its being regarded 

 as a distinct species, there are numberless varieties 

 of other molluscs which are equally entitled to be 

 raised to a similar rank. 



2. S. EL'EGANS,* RiSSO. Pl. V. 



Body yellowish-brown, sometimes blackish, paler in colour 

 beneath, with very small round tubercles ; tentacles very 

 short, diverging at their base, transparent, yellowish-white, with 

 a longitudinal row of black specks, upper pair with rounded 

 tips ; foot broad, margined with white, rounded in front and 

 somewhat pointed behind. 



Shell more slender in form than the last, not quite so thin, 

 glossy, semitransparent, of a dark amber colour frequently tinged 

 (especially at the apex) with pink ; striation as in S. putris ; 

 whorls 3-4, scarcely so convex as in the last species ; spire 

 rather more produced, apex less obtuse ; suture exceedingly 

 obhque, moderately deep ; viottth as in S. putris, but narrower ; 

 outer lip slightly thickened, much inflected above. 



Inhabits situations similar to those frequented by 

 5. putris, with which it is often found in company. 



* Elegant. 



