16 PEOCEEDINGS OF THE ISTATIOlSrAL MUSEUM vol.78 



summit and the median band on the last two whorls. Aperture 

 broad, peristome moderately expanded and reflected but only slightly 

 thickened. 



The type, Cat. No. 312957, U.S.N.M., bears the label Luzon. It 

 has 4.7 whorls and measures — height, 3-4.3 mm. ; greater diameter, 

 36.4 mm. ; lesser diameter, 28.8 mm. 



A young specimen which I believe belongs here was collected by 

 Col. E. A. Mearns and bears the label Tibi and Pili Hot Spring, 

 Albay Province, Luzon. 



The helicoid form distinguishes this race from the others 

 described. 



COCHLOSTYLA PERSIMILIS ACRYBIA. new subspecies 



Plate 8, Figures 4-6 



1851. Helix mirahilis, Ferussac, Hist. Nat. MoL, vol. 1, pp. 319-20, pi. 108B 

 figs. 9-10, 



Shell small, ovate. Early whorls brown or white, the re'st yellow 

 with a brownish-orange tinge. Umbilical zone brown, peripheral 

 and median bands broad, while the band at the summit is rather nar- 

 row. All bands dark chestnut brown. Aperture rather narrow; 

 peristome and interior of aperture bluish white. 



The type, Cat. No. 312958, U.S.N.M., has 5.1 whorls and meas- 

 ures — height, 34.2 mm. ; greater diameter, 28.5 mm. ; lesser diameter, 

 25.9 mm. 



This subspecies suggests in form C oclilostyla metaformis, from 

 which, of course, the columella will at once distinguish it. Its gen- 

 eral shape is different from all other races described so that it can 

 not be confused with them. 



COCHLOSTYLA PERSIMILIS BOACANA, new name 



Plate 8, Figures 1-3 



1846. Helix mirahilis Pfeitfer, Martini-Chemnitz, Conch. Cab., ed. 2. vol. 1, 



pt. 12, pp. 288-9, in part, pi. 48, fig. 9, 

 1851. Helix mirahilis Reetv'e, Concli. Icon., pi. 12, fig. 45f. 

 1853. Helix mirahilis Pfeiffek, ]Mon. Helic. vivent., vol. 3, p. 172, in p;irt. 

 1859. Helix mirahilis Pfeiffee, Jlon. Helic. vivent, vol. 4, p. 206, in part. 

 1887. Cochlostyla mirahilis Hidalgo, .Tourn. Conchyl., vol. 35, p. 144, in part. 

 1891. Cochlostyla mirabilis Pilsbry, Man. Conch., ser. 2, vol. 7, p. 182, pi. 57, 



fig. 80. 

 1898. Cochlostyla mirahilis crassa Mollendokff, Abhand. Naturf. Ges. Gorlitz, 



vol. 22, p. 113, not Cochlostyla intorla crassa Mollexdorff, Berichte 



Senckenberg Naturf. Ges., p. 232. 1890. 

 1909. Cochlostyla mirahilis Moixenuorff, Kobelt and Winter, Semper Reis. 



Arch. Phillip., vol. 70, pt. 7, pp. 152-3, pi. 30, fig. 6. 



Mollendorff in creating Cochlostyla mirdbilis crassa in 1898 failed 

 to remember that he had already employed the name crassa in the 



