182 Proceedings of the Biological Society of Washington. 



Amphidromus versicolor secamensis, new subspecies. 



Seventy-five specimens collected by Mr. Weber on Secam Island are 

 before me, all of which have the dark tip characteristic of versicolor, but 

 only one of which shows the dark flammulations on the early whorls. The 

 rest are unicolor, or occasionally with hydrophanous lines. The general 

 color varies from white through pale yellow to green. There is a tendency 

 in some of the specimens to show the red sutural band characteristic of 

 Amphidromus quadrasi. The lip in about half of the material is dark edged 

 and a rosy tint surrounds the columella in about half the specimens. There 

 is a great variation in the size of this race. 



Twenty-five specimens taken at random measure: 



i Type. 



Amphidromus versicolor canabunganensis, new subspecies. 



Mr. Weber has sent us sixty-two specimens of dark tipped Amphidromus 

 from Canabungan Island. These are bright yellow suffused with green. 

 Almost half of the specimens have the last whorls streaked with axial lines 

 of green which are almost sufficiently closely spaced to render the whole 

 whorl of a green tint. A few of the specimens are almost white. Two of 

 the specimens have the characteristic flammulations on the early whorls. 

 A number have dark lips. A few have a mere indication of pinkish at the 

 columellar area. 



Twenty-five of these taken at random measure : 



