62 ZOOLOGY OF THE VOYAGE OF H.M.S. SAMAEANG. 



The lip of this species is reflected with a characteristic violet-flesh tinge. 



15. Helix ihmaculata. PI. XYI. Fig. 5. H. testa pyramidali-globosa, vix unibilicata, alba, semi- 

 pellucida, nitidula, striis incrementi distinctis, anfractibus quinque, convexiusculis, ultimo subcarinato, 

 apertura lunato-orbiculari, peristomate parum reflexo. 



Hab. Philippine Islands. 



Of a shining semitransparent blue-white substance, with the remains of a slight 

 epidermis about the sutures. 



16. Helix caliginosa. PL XVI. Fig. 6. H. testa subglobosa, perforata, strigis obliquis eleva- 

 tiusculis concentrice notata, lutescente-alba, anfractibus sex, ultimo spadiceo-fusco, fascia angusta rufa 

 circumdata, apertura depresso-lunata, peristomate reflexo. 



Hab. Island of Mindanao, Philippines. 



A striking new species, approaching the form of H. ungulina. 



17. Helix decora. PL XVI. Fig. 7. H. testa conoideo-globosa, imperforata, pallide straminea, 

 epidermide spadicea obtecta, oblique striata, anfractibus quatuor, planiusculis, ultimo subcarinato, apertura 

 lunato-orbiculari, intus alba, peristomate reflexo, intus albo, nitente. 



Hab. Island of Mindoro, Philippines. 



A smooth solid shell, of a delicate shining straw-colour beneath, whilst the upper 

 surface is covered with a fawn epidermis. 



18. Helix densa. PL XVI. Fig. 8. H. testa subdiscoidea, perforata, densa, obtuse carinata, 

 superne depressiuscula, oblique plicato-striata, undique eximie corrugata, fulvescente, infra carinam fascia 

 lata castanea circumdata, anfractibus quinque, apertura transverse lunata, intus alba, peristomate simplici, 

 intus subincrassato. 



Hab. Plvihppine Islands. 



Approaching the form of H. citrina, from which it differs in being of stouter growth, 

 and having the surface delicately corrugate throughout. 



19. Helix plueizoxata. PL XVI. Fig. 9. H. testa subglobosa, obtecte perforata, alba, ma- 

 culis pallide fuscis nubeculata, striato-rugosa, faschs plurimis spadiceis et purpurascentibus cincta, anfrac- 

 tibus quatuor, convexis, ultimo rotundato, apertura lunato-transversa, intus fusca, peristomate valde reflexo, 

 albo, margine inferiore subcalloso. 



Hab. Island of Mindanao, Philippines. 



The stripe-bauds which encircle this very characteristic species are mingled irregularly 

 fawn and purple-black. 



20. Helix canescens. PL XVI. Fig. 10. H. testa globosa, subobtecte perforata, opaco-alba, 

 strigis obliquis lineisque plurimis concentricis nigricantibus interruptis fasciaque conspicua centrali ornata, 



