COCHLOSTYLA-CORASIA. 121 



I Allied to C. virgo, but the carina is more obtuse and the lip white, 

 pecimens from Mindanao are more depressed, and sometimes larger 

 than the types, measuring over 40 mill. diam. according to Hidalgo. 

 See pi. 25, fig. 39 



Var. LAIS Pfr. PI. 25, fig. 40. 



Similar to C. puella but more globose, the peripheral angle more 

 obtuse ; columella more arcuate at base, not forming so distinct an 

 angle with the basal margin as C. puella. Peripheral band more 

 prominent. 



Mindanao, Philippines. 



H. lais PFR., P. Z. S. 1853, p. 49 ; Monogr. iii, p. 647. RVE. f. 

 1016. HIDALGO, Obras Malacol. i. p. 148, t. 21, f. 5. 



Figure 40 represents the type. Hidalgo believes lais to be a vari- 

 ety of puella. 



Var. SUBPUELLA Pilsbry. PI. 24, figs. 26, 19, 20, 21, 24. 



Thinner than puella ; multilineate with pale yellow on a white 

 ground-color, the periphery encircled by a dark chestnut band 

 which continues up the spire, forming a narrow border above the 

 suture to the apex. 



Basilan, Philippines (P. Acad coll.) Tukan Bessi Id. (Pfr.) 



H. lais var. PFR. in Novit. Conch, iv, p. 114, t. 126, f. 6, 7. 



Many specimens of this variety are before me, showing a remark- 

 ably constant color-pattern. 



C. IROSINENSIS Hidalgo. PI. 28, figs. 29, 30. 



Imperforate, depressed, about equally convex above and below, 

 the young carinated, adults angulated, the angle gradually dis- 

 appearing ; thin, subpellucid, little shining, smooth ; (under a lens 

 seem to be decussated with very subtle, inconspicuous spiral and 

 oblique striae); unicolored whitish under apalebuffish cuticle; apex 

 obtuse ; suture simple ; whorls 4, slightly convex, rapidly widening, 

 the last dilated in front, not descending, somewhat turgid at the col- 

 umella. Aperture trapezoidal; peristome thin or sublabiate, the 

 upper margin simple, basal margin arcuate, slightly reflexed, form- 

 ing an obtuse angle in the young with the white, flat, sloping col- 

 umella. Alt. 13, greater diam. 24, lesser 19 mill. (Hid.) 



Irosin (around the river), Prov. Albay, Luzon, Philippines. 



H. irosinensis HID., Journ. de Conchyl. 1887, p. 119, t. 4, f. 6; 

 Obras Malacol. i, p. 26, t. 25, f. 9. 



