CIO MR. G. F. ANGAS ON NEW LAND AND MARINE SHELLS. [May 7, 



2. Descriptions of Ten New Species of Land and Marine 

 Shells. By George French Angas, Corr. Mem. Z.S., 

 F.L.S., F.R.G.S., &c. 



[Received March 26, 1872.] 

 (Plate XLII.) 



1. Helix (Xanthomelon) lyndi, n. sp. (Plate XLII. fig. 1.) 



Shell imperforate, globosely conical, solid, obliquely plicately 

 striated, the upper whorls minutely granulated, the lower whorls dis- 

 tantly and obscurely concentrically striate, light chestnut-colour above, 

 the last whorl brownish olive, with a faint indication of paler bands 

 below the periphery ; spire convexly conical, apex obtuse ; suture 

 distinct, crenulated ; whorls 5, convex, last whorl descending in 

 front, and contracted behind the aperture ; aperture oblique, elon- 

 gately oval, purplish brown within ; peristome with the margins ap- 

 proximating, and united by a thin callus finely and sparingly granu- 

 lated, the right margin expanded and reflexed, light brown ; the 

 columellar margin angulated at the fore part, broadly and flatly ex- 

 panded, and slightly excavated at the upper part, white tinged with 

 light brown and furnished with a few irregular granules. 



Diam. maj. 20, min. 17, alt. 21 lines. 



Hab. Port Essingtou. 



This shell differs from H. pachystyla in the spire being more 

 raised, the aperture being move produced anteriorly, with the margins 

 approaching, and the outer lip expanded and reflexed. It also differs 

 in the character of the sculpture, and in being of a darker colour, and 

 having the aperture livid brown instead of white. This species has 

 hitherto been obtained only from Port Essington, whilst H . pachystyla 

 is widely distributed throughout Queensland. 



2. Helix (Geotrochus) Philomela, n. sp. (Plate XLII. 

 figs. 2 & 3.) 



Shell imperforate, trochiform, moderately solid, obliquely obscurely 

 striated, whitish, the whorls ornamented in the middle with a broad 

 fascia composed of numerous purplish chocolate bands with a similar 

 fascia below the periphery, and crossed obliquely with close narrow 

 white lines corresponding with the lines of growth ; spire conical, 

 apex obtuse, purplish black ; whorls 6, moderately convex, sutures 

 impressed, last whorl rather inflated, descending in front, and con- 

 tracted behind the aperture, base somewhat flattened ; aperture sub- 

 ovate, very oblique ; peristome thickened, expanded, and slightly 

 reflexed, the right margin a very little sinuated ; columellar margin 

 dilated, and furnished within with a prominent callus terminating 

 abruptly within the aperture ; the columella and the interior of the 

 aperture dark chocolate-brown, the inner edge of the lip orange, and 

 the reflected portion white, immediately behind which is a pigment- 

 like black deposit on the whorl. 



