330 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



later, marked by retractively slanting zones of dark brown. These 

 dark zones form a more or less fenestrated pattern occupying the re- 

 gion immediately below the suture. This character finds varying de- 

 grees of expression in the different subspecies. There is usually a 

 light peripheral zone, which shows considerable variation in width 

 in different shells and in some specimens appears almost completely 

 if not quite suppressed. The periostracum is also marked by fine 

 axial hair lines of varying shades of brown and numerous equally 

 slender spiral lines on spire and base. Decorticated specimens show 

 the early whorls flesh colored, the succeeding turn or two of buffish 

 tinge, followed by reddish-orange to chestnut-brown tints. The 

 peristome is dark; the columella white tinged with brown, while 

 the parietal callus usually agrees with the interior of the aperture 

 in color, var}dng from bluish white to pale slate-blue. 



COCHLOSTYLA RUFOGASTER BENGUETANA, new subspecies 



Plate 83, Figure 2 



1891. Cochlostyla rufogaster Hidalgo, Obras Malacologicas, p. 373, in part. 

 1S98. Cochlostyla rufogastra Mollendorff, Abh. Naturf. Ges. Gorlitz, vol. 22, 



p. 138, in part. 

 1912. Cochlostyla rufogaster Mollendorff, Kobelt and Winter, Semper's Reison 



im Arcbipel der Philippinen, vol. 10, pt. 14, p. 287, in part. 



This northern mountain race is elongate-ovate, with the whorls 

 rather inflated and rather strongly rounded at the summit. The 

 periphery of the last whorl is well rounded, showing no trace of 

 angulation. The unique type lacks the light peripheral zone. The 

 interior is bluish pearl gray and the peristome pale chocolate-brown. 

 In the inflation and rounding of the summit of the whorls it resembles 

 Cochlostyla rufogaster montalbana, from which it is readily distin- 

 guished by its much narrower shape and lack of peripheral angu- 

 lation. 



Type.— U.S.N.M. No. 208212, from Trinidad, Benguet Province, 

 Luzon. It has 6.1 whorls, and measures : Height, 76.2 mm ; greater 

 diameter, 50.7 mm. 



Remarks. — The references cited above refer to members of this 

 species in the general region from which the type came, and I believe 

 belong to this subspecies. 



COCHLOSTYLA RUFOGASTER JUANI, new subspecies 



Plate 85, Figure 1 



Shell rather broadly ovate with the whorls somewhat inflated and 

 rather well rounded, particularly so near the summit. The periph- 

 eral light zone is not overly strongly emphasized in the 15 shells be- 



