LAND SHELLS OF GENUS OBBA FROM MINDORO 



359 



showing best immediately behind the peristome on the upper surface. 

 The spiral striations are conspicuous — more so on the basal portion 

 of the last turn than on its upper surface. 



Type.— The type, U.S.N.M. No. 382694, has 5.1 whorls, and meas- 

 ures: Height, 13.3 mm; greater diameter, 29.7 mm; lesser diameter, 

 22.9 mm. It was collected by Pedro de Mesa on Lubang Island. 



Remarks. — Twenty-five topotypes, U.S.N.M. No. 382695, yield the 

 following additional measurements: 



This subspecies is distinguished from the other three here recognized 

 by its feeble crisscross sculpture, which it has in common with Obha 

 mesai johnsoni. From O. m. johnsoni it is easily distinguished by its 

 much stronger basal spiral sculpture. 



OBBA MESAI JOHNSONI, new subspecies 



Plate 92, Figure 4 



The ground color is flesh-color with a bufnsh tinge. The inter- 

 rupted brown bands and mottlings are bright chestnut-colored, being 

 a little paler on the early than on the later turns. The peristome is 

 flesh-colored with a buffish tinge. The crisscross markings are almost 



