Part 1. 



PHILIPPINE LAND SHELLS BAETSCH. 



37 



Another lot of 50 specimens, Cat. No. 215604, is labeled " Southern 

 Palawan region," without specific locality. 



A specimen in Mr. Webb's collection from Balabac is figured on 

 plate 12, figure 11. This has the whorls considerably more convex 

 than any we have seen. 



Plate 12, figures 4, 5, are specimens from Caxisigan Island and 

 figures from Candaraman Island. 



Another specimen in the Philadelphia Academy of Natural Sci- 

 ences is entered as Cat. No. 95172 and comes from the Quadras col- 

 lection from Balabac. 



AMPHIDROMUS QUADRASI VERSICOLOR Fulton. 



Plate 1, fig. 7 ; plate 18, figs. 1-10. 



Amphidromus quadrasi, var. c. Smith, Ann. Mag. Nat. Hist., ser. 6, vol. 11, 



1893, p. 351, pi. 18, fig. 11. 

 Amphidromus versicolor Fulton, Ann. Mag. Nat. Hist., ser. 6, vol. 17, 1896, 



p. 86. 

 Amphidromus quadrasi versicolor Von Mollendorff, Abhand. Naturf. Ges. 



Gorlitz, vol. 22, 1898, p. 150. 

 Amphidromus quadrasi versicolor Pilsbey, Man. Couch., vol. 13, 1900, pp. 



230-231, pi. 71, figs. 84, 87, and 90-91. 



The present form agrees in general shape and size fairly well with 

 typical quadrasi. All of the specimens, however, have the extreme 

 tip black, and none show the strong red girdle immediately below the 

 summit, although this is faintly indicated in one of the specimens 

 in the Philadelphia Academy of Natural Sciences. The main colora- 

 tion is pale yellow, the last whorl being frequently streaked with 

 axial lines of green, which, in some instances, become so concentrated 

 as to form broad green spiral bands. Some specimens have several 

 narrow spiral bands. The aperture varies from white to rose-purple. 

 This is also true of the outer lip and the umbilical area. Of the 

 specimens which we would refer to this form we have seen the 

 following : 



