PHILIPPINE LAND MOLLUSKS 



331 



fore us. In seven of them there is not a trace of it, and none shows it 

 when decorticated. The last whorl is very dark chestnut-brown, 

 while the peristome and the major portion of the columella are almost 

 black. The inside of the aperture is equally dark, bluish pearl gray — 

 darker than those in any other race before us. 



This race seems nearest to Cochlostyla rufogaster rufogaster, from 

 which it is easily distinguished by its much darker coloration and the 

 lack of the conspicuous peripheral band in the decorticated shell. 

 The peripheral angle is also almost absent. 



Type. — U.S.N.M. No. 313002, as well as all the specimens before 

 us, was collected at Novaliches, northeast Rizal Province, Luzon. It 

 has 5.9 whorls, and measures: Height, 64.3 mm; greater diameter, 

 48.1 mm. 



Remarks. — The rest of these specimens yield the following data : 



The last specimen was severely injured at an early stage and is 

 decidedly dwarfed and abnormal. 



Nine of these specimens were collected by F. Juan, for whom I 

 have named the race ; the rest were secured by A. Duyag- 



COCHLOSTYLA RUFOGASTER MONTALBANA, new subspecies 



Plate 83, Figure 1 



1846. Bulimus rufogaster Pfeiffes, Martini-Chemnitz Conchylien Cabinet, 2d 

 ed., vol. 1, Abth. 12, Theil 2, pp. 164-165, in part, pi. 50, fig. 21. 



1850. Bulimus rufogaster Reeve, Conchologia Iconica, species 4, in part. 



1851. Bulinms rufogaster Deshayes, Ferussac's Histoire naturelle mollusques, 

 vol. 1, p. 9, in part, pi. 116, figs. 3, 6. 



1890. Cochlostyla rufogaster Pilsbry, Man. Conch., ser. 2, vol. 6, p. 207, in part, 

 pi. 43, fig. 26. 



1891. Cochlostyla rufogaster Hidatxjo, Obras Malacologicas, p. 373, in part, pi. 

 61, fig. 5?; pi. 105, fig. 5. 



This race is rather large and broadly ovate- It has an obsolete 

 peripheral angle, and a light zone may or may not be present at this 

 place under the periostracum. It suggests most nearly Cochlostyla 



