366 bartsch: land shells of Palawan passage 



olive patch on the middle of the turn behind the aperture. The area 

 near the summit of the whorls remains pale wax-yellow. Base with a 

 narrow spiral chestnut brown band whose posterior border touches the 

 posterior angle of the aperture; this is succeeded by a broad, yellow 

 spiral zone, and this in turn by an equally wide spiral brown band, 

 while the columellar area is a greenish and pinkish yellow. Lip white. 



23. Like the last, but with the subperipheral spiral band double. 



24. Like no. 22, but with the base dark chestnut-brown and a spiral 

 mid-basal wax-yellow band, the columella area wax-yellow. 



25. Tip dark; the two first turns flesh-colored; the ground color of 

 the rest pale wax-yellow excepting the last turn, which is wax-yellow. 

 All except the first two, and the last half of the last turn are marked by 

 axial chestnut-colored flamulations. The last turn has fine spiral lines 

 of chestnut brown. Base with a subperipheral and median band of 

 dark chestnut brown, the lest wax-yellow excepting a pinkish line at the 

 insertion of the columella. This line is also carried around the inner 

 lip of the aperture, the inside of which is pale pinkish white. 



26. Tip dark; the first two whorls flesh-colored; the ground color of 

 the succeeding turns flesh-colored, this on the last whorl slowly giving 

 way to pale yellow. All but the first two whorls marked by chestnut- 

 brown axial flamulations, which, on the last turn, do not terminate at 

 the periphery but extend over the base. These axial markings become 

 condensed immediately behind the lip and render this portion almost 

 unicolor. The inside of the aperture shows the dark color bands of the 

 exterior. The peristome is white, but the inner edge of the lip is 

 marked by purpUsh dark chestnut-brown bands. 



27. Similar to the last, but of much more yellowish color, and with 

 the axial flammulations much broader. These axial broad bands form an 

 angle as they pass over the periphery. The insertion of the columella 

 is encircled by a dark chestnut band. 



28. Similar to the last but with the base largely dark excepting a 

 broad pinkish band a little anterior to the periphery. This band 

 becomes evanescent before it encircles half of the last turn. 



The shells from Mantangule Island, which may be called Am- 

 phidromus versicolor weberi,^ are by far the most brilliantly colored 

 of all the known races of Amphidromus versicolor. However, we 

 have here a much more uniform color pattern than in the speci- 

 mens in the races from Balabac and Bancalan. All the specimens 

 have a dark tip which is succeeded by two or more flesh-colored 

 turns. The ground color of the succeeding turns may be flesh- 

 colored, tinged with yellow or wax-yellow. In the one type 

 of coloration no axial flammulations of chestnut brown are present 

 on these whorls, while in the other they are strongly marked. 



8 Type, Cat. No. 218422,. U. S. National Museum. 



