12 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 78 



1887. Cochlostyla mirabilis Hidalgo, Jouin. Conchy!., vol. 35, p. 44, in part. 

 1891. Cochlostyla iniraUUs trichroa Pilsbey, Man. Conch., ser. 2, vol 7, p. 182, 



pi. 31, fig. 38. 

 1894. Eelicostyla mirabilis trichroa Pilsbby, Man. Conch., ser. 2, vol. 9, p. 224. 

 1898. Cochlostyla mirabilis trichroa Moixendoeff, Abhand, Naturf. Ges, Gor- 



litz, vol. 22, p. 113. 

 1901. Cochlostyla mirabilis trichroa Hidalgo, Obras. Malac, pt. 1, p. 443, in part. 

 1909. Cochlostyla mirabilis trichroa Mollendorff, Kobelt and "Winter, Semper 



Reis. Arch. Philip., vol. 10, pt. 7, p. 152, pi. 30, fig. 5. 



Pilsbry in diagnosing this subspecies ^ says : " Having four wide 

 or narrow blackish-brown bands, and three yellowish-brown bands in 

 their intervals." This characterization equally defines the form 

 to-day. 



The typical form, Pilsbry saj^s, comes from Albay. This is repre- 

 sented by Figures 7-9 on Plate 5. In some of our shells the light 

 brown band between the peripheral and median is absent. Such a 

 shell we have from the Quadras collection from Libmanan, Ambos 

 Camarines, Luzon. 



COCHLOSTYLA PERSIMILIS Ferussac 



The shape of the shell in this species varies from helicoid to ovate. 

 The shell is covered by a well developed translucent periostracum, 

 which in most instances is lemon yellow, but in some subspecies 

 darker shades, even a pale brownish tinge, are present. The shells 

 may be unicolor, a brown umbilical area may be present and in addi- 

 tion to this a peripheral zone of brown, a zone of brown at the sum- 

 mit and one between this and the periphery may be present. Any 

 one of these elements may be absent, but as a rule the members of 

 the various subspecies show a tendency to be constant in whatever 

 phase of coloration they may have acquired. Hydrophanous bands 

 are absent. The aperture varies considerably in shape, in some 

 races being considerably protracted at the junction of its outer and 

 basal lip. Peristome thickened, expanded and reflected, white. 



All the races here described come from southern Luzon excepting 

 Cochlostyla persimilis ioacana, which comes from Marinduque. 



COCHLOSTYLA PERSIMILIS PERSIMIUS Ferussac 



Plate 6, Figure 7-9 



1846. Helix mirabilis Vfelffer, Martini-Chemnitz, Couch. Cab., ed. 2, vol. 1, 

 pt. 12, p. 289, in part, pi. 48, fig. 8. 



1850. Helix persimilis Febussac, Hist. Nat. Mol., vol. 1, p. 320, pi. lOSC, figs. 



5 and 6. 



1851. Heliw mirabilis Reeve, Conchol. Icon., pi. 12, fig. 45d. 



1853. Heli<v persimilis var. d. Pfeiffer, Mon. Helic. vivent., vol. 3, p. 172. 

 1859. Helix mirabilis Pfeiffer, Mon. Helic. vivent, vol. 4, p. 206, in part. 



- Mau. Conch, ser. 2, vol. 7, p. 182. 



