9S 



m. Shell white, witli a single brown hand at its circumference. 

 From Ligao. 



n. Shell white, with alternately verj' pale and dark brown bands ; 

 antesutural line and columellar band dark brown. From Ligao. 



0. Shell very pale brown, with a very thin epidermis ; two dark 

 brown bands, the one before and the other behind the light brown 

 circumferential band ; antesutural line and columellar band dark 

 brown. From Ligao. 



p. Shell totally white. Also from Ligao. 



Helix opalinus. Hel. testa pyramidalis, conica, obtusa, hyaUna, 

 tenuis, albido-viridescens, Itevis, nitida, striis incrementi temtissi- 

 mis solum scvlpta ; anfractibus senis, subconvexis , ultimo antici 

 obtuse subcarinato ; suturd distinctd, antice lined albd angustis- 

 simd ; aperlurd obliqud, subrotundatd, superne basi ultimi an- 

 fracttls fere plana modijicatd ; peritremate svbreflexo, prope colu- 

 mellam subincrassato ; columella albd, subincurvd, sulco subobso- 

 leto circumdatd . 

 Long. 1-25, lat. 08. 



Hab. supra folia fruticum prop^ St. Jaun, Provinciam Cagayan 

 Insulae Luzonicse. 



A remarkably delicate species, having nearly the form of Helix 

 pileus ; it is, however, narrower in proportion to its height, its vo- 

 lutions are less numerous, and rather more convex. This elegant 

 species has the usual colour and semitransparency of the Semi-Opal, 

 which, however, becomes rather greener towards the base. 



Helix cincinnus. Hel. testa ovato-pyramidalis, tenuis, lavis, ple- 

 ritmque nitida, subhyalina ; epidermide albo fuscoque varid, hand 

 nitida nonnunquam induta ; spird elatiusculu, obtusd ; anfracti- 

 bus senis, convexiusculis, solum striis incrementi tenuibus indutis; 

 suturd distinctd ; aperturd subovali, postice acuminatiusculd, su- 

 perne basi anfractds ultimi rotundatd modificatd, sinistrorsiim 

 sinuatd ; peritremate angusto, rejlexo j columelld albd, antice per- 

 oblique subtruncatd. 

 Long. 1"S, lat. 1"1. 



Hab. supra folia arborum ad Insulas Philippinas. 

 Another very variable species, particularly in its colouring and in 

 the characters dependent upon its epidermis. Numerous, however, 

 as its varieties are, and abundant as the species is, it does not ap- 

 pear to have been described either by Lamarck or De Ferussac ; in- 

 deed, I have not been able to find any species nearly approaching it, 

 except Helix ventricosa, De Fer., which is figured in Chemn. vol. ix. 

 f. 1007, 1008, and which somewhat resembles the banded variety 

 of our shell. The following varieties have been brought by Mr. 

 Cuming : — 



fl. Shell white, last volution pale green, which is darker in its an- 

 terior part. From the island of Rumblon. 



b. The same as a, but having a dark brown band surrounding the 

 columella. On some specimens of this variety the remains of a dark 



