Land- Shells from Vanbu, Tonkin. 129 



were unknown, the two present varieties would probably be 

 regarded as constituting a distinct species. 



Camcena illustris, Pfeiffer. 



Helix illustris, Pfr. Proc. Zool. Soc. 1862, p. 269, pi. xxxvi. fig. 8, var. ; 



Novitates Conch, vol. ii. p. 208, pi. lv. figs. 1, 2 (type), tig. 3 (var.). 

 Canmna illustris, Pilsbry, Man. Conch. 2nd ser. vol. ix. p. 104, vol. vi. 



pi. xiii. figs. 57, 58. 



Hab. Lao Mountains, Cambodia {Pfr.). 



Some specimens from Vanbu, Tonkin (var. tonkinensis), 

 differ from both the type and variety (var. jlava) described by 

 Pfeiffer. In form they are a little more ventricose, and they 

 also differ in coloration. The general ground-tint is purplish 

 red, interrupted at the periphery by a rather broad yellowish 

 zone, the middle of which is traversed by a deep red line 

 varying in width from 2 to 4 millimetres. The aperture and 

 peristome are livid or lilac, but the columellar callus in the 

 centre of the base is white and entirely conceals the um- 

 bilicus. Near the latter there is a distinct inflation of the 

 surface, a feature less marked in the original specimen 

 described by Pfeiffer. 



Camcena vanbuensis. 



Testa magna, solida, obtecte perforata, depresse conoidea, in medio 

 acute carinata, saturate castanea ; spira brevis, convexe conica, ad 

 apicem obtusissima, rugis obliquis irregularibus undique sculpta ; 

 anfractus 5, celeriter sed regulariter accrescontes, ad suturam 

 carinati, primi duo convexiusculi, sequentes duo planiuscub, 

 ultimus ad peripheriam acute carinatus, supra valde concavus, 

 baud descendens, infra convexus, sed prope cariuam leviter exca- 

 vatus vel impressus, concentrice subreticulatim rugosus ; aper- 

 tura paulo obliqua, livido-fusca, submargaritacea vel iridescens ; 

 peristoma incrassatum, expausum, retlexum, hepatico-fuscum, 

 nitens, marginibus callo tenui cseruleo-albo junctis, columellari ad 

 insertiouem conspicue incrassato expanso et reflexo, umbilicum 

 fere obtegente. 



Diam. maj. 68 millim., min. 57, alt. 38; apertura intus 31 b.ta, 

 18 alta. 



Var. Testa olivacoo-flavescens, carina castanea cincta. 



This species differs only in form from C. illustris, Pfeiffer, 

 the colour, number of whorls, sculpture, aperture, and peri- 

 stome being similar in both. The flatness of the whorls and 

 the sharp carination at the periphery, however, at once 

 distinguish this form, which, until the connecting-links are 



Ann. & Mag. N. Hist. Ser. 6. Vol. xvii. 9 



