364 bartsch: land shells of Palawan passage 



versicolor palawanensis , but the presence of a peripheral angle 

 separates it from that subspecies. 



From Mt. Landargung, in the interior of southern Palawan, we 

 have seen two specimens collected at an altitude of 2,500 feet 

 which, while they agree in general coloration with Amphidromus 

 versicolor everetti, are nevertheless much lighter in tone than that 

 form, and the interior, instead of being purplish, is white. The 

 edge of the lip is dark purple. 



This mountain race deserves to be recognized by a trinomial 

 name, and I will call it Amphidromus versicolor monticolus. The 

 type« had 6.7 whorls and measures: altitude, 40.3 mm., greater 

 diameter, 21.2 mm. 



The greatest range coloration is presented in the forms from 

 Vancalan Island, which may be known as Aviphidrovms versi- 

 color higginsi Bartsch.^ A selected series shows no less than 

 twenty-eight types of coloring, which I shall describe briefly. 



1. Tip dark, the ground color white, with a greenish suffusion which 

 is most pronounced on the parietal callus. 



2. Wax-yellow, a little lighter on the early whorls, with a greenish tint 

 on the last; tip dark. 



3. Midway in coloration between the last two but with an obsolete 

 angle -at the periphery. 



4. Tip dark, the next white with a yellowish suffusion; last whorl 

 gradually turning green; edge of the lip maroon. 



5. Like the last. In addition, however, all but the first two and a 

 half and the last one and a half turns, are marked by axial flammulations 

 of chestnut brown. 



6. Like no. 4, but with the early whorls wax-yellow, and the lip 

 white. 



7. Like the last, but the first three postnuclear turns show faint, 

 light brown axial flammulations in addition. 



8. Tip dark, the first two and a half turns flesh-colored; the two and 

 a half succeeding these with flesh-colored ground upon which strong, 

 axial, branching flammulations of chestnut brown are placed; the rest is 

 wax-yellow turning greenish on the last turn. The last two and a half 

 turns are encircled by a narrow zone of carmine at the suture, which 

 color also surrounds the insertion of the columella. 



9. Tip dark; all but the last four-fifths of the turns pale wax-yellow, 

 the last portion marked by closely spaced dense axial streaks of varying 



^ Cat. No. 218795, U. S. National Museum. 



' Type, Cat. No. 218420, U. 8. National Museum. 



