266 MR. G. F. ANGAS ON NEW HELICES. [Feb. 15, 



outer lip verj' slightly ex])anded and reflected ; the collumella de- 

 scending vertically and callously reflected over the perforation. 



Diam. niaj. 10, min. 8, alt. iS lines. 



i/ff6,? Solomon archipelago. 



Var. a. Rich orange-yellow throughout, inner lip white, apex some- 

 times of a carnelian color. 



Var. b. Bright yellow, apex orange, with a narrow black band im- 

 mediately below the suture of the last whorl, lip black. 



Var. c. Pellucid white, upper whorls yellow or orange. 



Var. d. Upper whorls white, last whorl light brown, with a narrow 

 pale band below the suture, lip white stained inside with purple. 



Var. e. Very dark purplish chocolate-colour, reddish towards the 

 apex. 



This shell, like Helix meta, Pfr., is subject to remarkable variations 

 in colour, but may at once be distinguished by its smaller size, the 

 convexity of the whorls, and the roundness of the aperture, in which 

 the subflexnous outer hp and diagonal form of H. meta are wanting. 

 The general form of the shell presents somewhat of a Paludina-Yike 

 aspect. The outer lip is much less expanded and reflected than in 

 H. meta, and the texture less glossy and shining. 



Helix ramsdeni, n. sp. (Plate XX. figs. 6, 7.) 



Shell imperforate, turbinate, rather solid, obliquely faintly striated, 

 white, ornamented with a narrow brownish-black band on the lower 

 part of the penultimate whorl, and two broader black bands, one 

 above and the other below the periphery of the last whorl, the cen- 

 tral band being irregularly marked with diaphanous white spots ; 

 base tinged more or less with suffused chestnut next the columella ; 

 spire conical, apex rather obtuse ; whorls 5^, convex, the first three 

 somewhat pellucid, the last descending in front; aperture very 

 oblique, truncately oval ; peristome white, the right margin ex- 

 panded, sinuous, and reflected ; the columellar margin obliquely 

 descending, flattened and expanded, slightly grooved in the middle, 

 and furnished with a long straight callus terminating abruptly 

 within the aperture. 



Diam. maj. 12|, min. lOi, alt. 13 hues. 

 ,Hah. ? Solomon archipelago. 



This beautiful shell is somewhat allied to H. boivini of Petit 

 {H. sxibrepta of Quoy), but it exhibits certain differences so marked 

 as to induce me to characterize it as a distinct species. The whorls 

 of //. ramsdeni are more rounded, the last whorl is smaller, and the 

 shell generally somewhat more conical tlian in B. boivini; whilst 

 the peculiar white spots on the central black band remind one of 

 similar markings in H. ambrosia, Ang. The beautiful scarlet outer 

 lip so constant in //. boivini is entirely absent in the present species ; 

 and the shell is of an almost bluish white, while H. boivini has a 

 warm yellowish tinge. 



I have named this shell in memory of the late Lady Harriet 

 Ramsden, from whose collection the typical specimen originally 

 came. 



