1892.] THE LAND-MOLLUSCA OF THE PHILIPPINES. 451 



Evenly distributed over almost all the group, except where re- 

 placed by Aoeina (Cebu, Siquijor), One species {xonifera) is common 

 to Luzon, Leyte, Samar, and Mindanao. A group within this group 

 (Samper's cmere^e), consisting oi cryptica,latitans, cretata, panaensis, 

 and cineracea, occurs in the contiguous islands of Samar, Leyte, 

 Surigao, Panaon, Bohol, and Mindanao, but not in Luzon. 



5. Helicostyla. 



Luzon, 14 : curta, Sby., monticula, Sby., annulata, Sby., libata, 

 Rve., mirabilis, Fer. (also in Alabat), montana, Semp., 

 fenestrata, Sby., fumigata, Mts., balteata, Sby., sphserica, 

 Sby., boettgeriana, Mollf., metaformis, Fer. (also in Alabat), 

 ^ iloconensis, Sby., hindsi, Pfr. 



Marinduq^ue, 1 : mirabilis, Fer. 



Mindoro, 4 : orbitula, Sby., tenera, Sby., fulgens, Sby., hydro- 

 phana, Sby. 



Cuyos, 1 : ignobilis, Sby. 



Tablos, 3 : crossei, Hid., bruguieriana, Pfr., turbo, Pfr. 



Romblon, 2 : effusa, Pfr,, bembicodes, Pfr. 



Sibuyan, 1 : effusa^ Pfr. 



Gebu, 1 : ^ collodes, Pfr. 



\_Bohol, 1: ^ metaformis, 'Fer.']. 



One of the few subgenera well represented in Mindoro in common 

 with other islands. It occurs on the Tablas-Romblon-Sibuyan 

 group, but is not recorded from any other of the central islands 

 except Cebu (and collodes is a remarkably aberrant form), or from 

 Leyte and Samar. The species are remarkably peculiar to the 

 separate islands. 



6. COCHLODRYAS. 



Mindoro, 1 : florida, Sby. 

 Burias, 1 : polychroa, Sby. 



A subgenus of very restricted and apparently broken distribution. 

 Possibly ' Burias ' may turn out to be incorrect. 



7. EuDoxus. 



Luson, ] ? : * chloroleuca, Mts. 



Catanduanes, 3 ? : ^ chloroleuca, Mts., leopardus, Pfr., bustoi, 



Hid. 

 Mindanao, 6 : smaragdina, B,ve., straminea, Semp., segle, Brod., 



cumingi, Pfr., paradoxa, Semp., oviformis, Semp. 



^ Griven in error by Hidalgo from Mindanao : Semper especially records it 

 as peculiar to Yloeos, a couple of provinces in N. Luzon, 



^ Wrongly given by Hidalgo from Zamboanga, S. Mindanao. 



^ The locality is due to Hidalgo, but he does not state his authority, and there 

 can be little doubt that it is incorrect. Von MoUendorff, who collected in 

 Bohol, does not mention it. 



* The classification of this species, and its assignment to Luzon, are matters 

 of doubt. 



