COCHLOSTYLA-CORASIA. 117 



Is. Catanduanes and Potillo, off E. coast of Luzon (Moll.) ; Baler 

 Casiguran and Cordillera, Ambubuk, on the E. coast of N. Luzon 

 (Semper); Albay, Luzon; also Sibonga, Zebu? (Cuming.) 



H. regince BROD., P. Z. S. 1841, p. 36. PFR. in Conchyl. Cab., t. 

 68, f. 8-11 ; Monogr. i, p. 299. REEVE, Conch. Icon., f. 125.- 

 Caracolla regince E.V., Conch. Syst, ii, t. 167, f. 2. Cochlostyla 

 regince MARTENS in Mai. Bl. xv, p. 1 62, 1868. Cochlostyla ( Corasia) 

 regince SEMPER, Phil. Archip. Landmoll. iii, p. 168. v. MOLL., Ber. 

 Senck. Nat. Ges. 1890, p. 229. Helix (Chlorcea) regince HIDALGO, 

 Obras MalacoL, p. 153, t. 24, f. 3, 4. H. smaragdina GRAT., Act. 

 Soc. Bord. xi, p. 405, t. 3, f. 26, 27. (Young.) 



The bright bluish-green hue of this species distinguishes it for 

 beauty, even in this genus where vividly colored shells are the rule. 

 The typical regince has the apical whorls white, and the periphery 

 has no bands. I am disposed to follow Hidalgo in considering the 

 following two forms geographic varieties rather than distinct species. 



Var. ALMS v. Moll. PI. 25, figs. 42, 43, 44. 



Spire flatter, the apex purple-brown ; last whorl encircled by 

 a brown girdle, and descending a little in front, 



Alt. 11*, greater diam. 30 mill. 



Algeria and Boljoon, Zebu; Puerto Galera, Mindoro. 



H. regince var. b, PFR., Monogr. i, p. 299. ? FER., Hist., 1. 102, f. 

 15, 16. Cochlostyla almce v. MOLL., Landschu. Fauna Cebu, p. 227, 

 t. 8, f. 5. H. ( Chlorcea) regince var. almce HIDALGO, Obras 

 Malacol. i, p. 153. 



This variety forms a transition toward certain forms of C. dryope. 



Var. ELIZABETHS O. Semper. PI. 25, figs. 47, 48. 



Shell larger, the carina more acute, and the spire flat. 

 Alt. 14, diam. 38 mill. 



Island of Calayan, off Northern Luzon. 



Cochlostyla (Corasia) elizabethce O. SEMPER, Journ. de Conchyl. 

 1866, p. 261, t. 8, f. 2. C. SEMPER, Phil. Archip. Landmoll. iii, p. 

 168. H. elizabethce PFEIFFER, Monogr. v, p. 307. H. (Chlorcea) 

 regince var. elizabethce HIDALGO, Obras Malacol. i, p. 154. 



C. PAPYRACEA Broderip. PI. 24, figs. 34, 35, 36. 



Imperforate, convexly flattened above, acutely carinated at the 

 periphery; thin, white, under a very light greenish-buff tinted cuti- 

 cle, having a small brown dot at the apex. Surface delicately 



