97 



nunqunm unicolor, sapius zonis duabus nigris ornata ; unfracti- 

 bus quatuor, rotundatis, ultimo mnximo ; aperturd subcirculari ; 

 peritremate reflexo, nlbo, columelld albd, subincurvd, rectiusculd. 



Long. 12, lat. r35. 



Hab. supra folia arborum ad insulam Marinduque, Philippinarum. 



The appearance of the different varieties of this species might lead 

 to the supposition that they were distinct species, in consequence of 

 the peculiarities of the outer portion of the epidermis. The whole 

 epidermis of this species seems worthy of particular notice : it con- 

 sists of an inner coat, which is rather thick, horny, apparently strongly 

 adhesive, and of a greenish brown yellow colour ; and of an outer 

 partial coat, which is white and hydrophanoiis, and which does not 

 entirely cover the inner coat, but is variously arranged upon it in 

 the different varieties. The following are the most remarkable va- 

 rieties : — 



a. Shell brown, with two very dark-brown spiral bands, a lighter 

 antesutural band, and a very dark columellar band. lAp white at 

 the back as well as in front. From the island of Marinduque. 



b. Shell coloured similarly to the last, but having its outer sur- 

 face slightly rugulose. From the same locality. 



c. Shell coloured similarly to the two former, but with an exter- 

 nal white epidermis disposed in slightly interrupted spiral bands. 

 Found on the leaves of trees in Tayal)as, in the province of Taya- 

 bas, Island of Luzon. 



d. Shell light brown, with a dark- coloured antesutural band, and 

 very dark columellar band ; external white epidermis disposed as the 

 last. From the same locality. 



e. Shell brown, not banded, with the white external epidermis 

 disposed in irregular and interrupted lines, nearly following the di- 

 rection of the lines of growth, but increasing in width so as to form 

 an interrupted band at the circumference of the shell. Found on 

 the leaves of small trees on the island of Capul. 



/. Shell pale brownish yellow, with the white external epidermis 

 similarly disposed, but forming two rather broader and less inter- 

 rupted bands, one at the circumference and the other anterior. 

 From the same locality. 



g. Shell white, with alternating light and dark brown bands ; 

 antesutural line and band round the columella dark brown. From 

 Ligao, South Camarenis, island of Luzon : found on the leaves of trees. 



h. Similar to g, but the alternating bands are dark brown and 

 black ; the antesutural line and the band round the columella also 

 are black. From Pasacao, South Camarenis : found on the leaves 

 of trees. 



i. Similar to the last, only destitute of the central brown band. 

 From the same locality as h. 



k. Shell white, with three brown bands ; antesutural line and 

 columellar band of the same colour. From Ligao. 



/. Shell white, with two brown bands ; antesutural line and colu- 

 mellar band of the same colour. From Ligao. 



