bartsch: classification of helicinidae 647 



The other two species have the base only moderately convex. The 

 one Geophorus romhlonensis n. sp., coming from the island of Romblon, 

 is a rather compressed form, having a very broad peripheral keel, with 

 a decided depression at the junction of the base and keel. The type 

 of this. Cat. No. 334254, has 5.5 whorls, and measures: altitude, 8 mm.; 

 greater diameter, 16.5 mm. 



The fourth speciies, Geophorus mindoroensis Wagner which is also 

 rather depressed, is much smaller than the last and comes from the island 

 of Mindoro. A typical specimen, Cat. No. 184940, having 5.1 whorls, 

 measures: altitude, 7.1 mm.; greater diameter, 14.3 mm. 



Of the smaller species belonging to this section, three are known. 

 One of these from the island of Negros, which may be known as Geo- 

 phorus negrosensis n. sp., has the spire rather elevated. The type of 

 this. Cat. No. 302751, has 5.5 whorls and measures: altitude, 7.3 mm.; 

 greater diameter, 10.9 mm. 



The other two species have the spire rather depressed. On one of 

 these, Geophorus nitidulus (Alollendorff) Wagner, the shell varies from 

 yellow to horn colored. This comes from central Luzon, and is particu- 

 larly abundant in the region of Montalban. A typical specimen, Cat. 

 No. 256989, having 5.3 whorls, measures: altitude, 6 mm.; greater 

 diameter, 10.6 mm. 



The last species, Geophorus versicolor MoUendorff, which comes from 

 the island of Sibuyan, has the whorls japan-rose colored. A specimen of 

 this species, Cat. No. 195495A, having 5.6 whorls, measures: altitude, 

 6.8 mm.; greater diameter, 11.9 mm. 



Section II 



The second section has fine incised spiral lines, but the columella is 

 not strongly excavated, nor does its junction with the basal lip form a 

 decided angle, but the columella passes almost without demarcation 

 into the basal lip. Of this section there are five species. 



Shell with a brown band on the base near the periphery. 



Greater diameter more than 15 mm worcesteri Bartsch 



Greater diameter less than 10 mm . .benguetanus Bartsch 



Shell without a brown band on the base near the periphery. 



Greater diameter more than 14 mm catainganus Bartsch 



Greater diameter less than 8 mm. 



Shell decidedly elevated trochulus MoUendorff 



Shell depressed monticolus MoUendorff 



Two of the five forms of this section have a brown band near the 

 periphery on the base. One of these, Geophorus worcesteri n. sp., which 



