COCHLOSTYLA-ORTHOSTYLUS. 1 1 



1. Typical ventricosa (pi. 3, figs. 25, 28). Ground color olive- 

 brown or tawny-yellowish, having dark bands at periphery, above 

 and below the suture, and usually around the columella. Hydroph- 

 anous creamy cuticle generally well developed. The following fig- 

 ures represent this variety : Chemnitz, pi. 117, f. 1007, 1008 (the 

 hydrophanous coat had been worn from the specimen figured) ; 

 Conchyl. Cab. pi. 58, f. 1, 2 ; Conch. Icon. pi. 5, fig. 206 ; Abbild. 

 u. Beschreib. iii, Bui. pi. 7, fig. 9. Other forms of the typical var- 

 iety have the dark bands very faint or lacking (pi. 3, figs. 24, 26), 

 and the hydrophanous cuticle prominently developed. In a few 

 specimens before me the characteristic zigzag dark stripes are absent 

 (fig. 24). 



2. Scarcely separable from this is the form called GUIMARASEN- 

 srs Keeve (pi. 3, fig. 31), which has the same ground color, but lacks 

 hydrophanous creamy markings. The bands are usually narrower 

 than in fig. 31. Besides Reeve's figures, the following illustrations 

 represent this variety : Fer. Histoire, iv, pi. 157, figs. 9-12; Con- 

 chyl. Cab. pi. 58, fig. 4. 



3. The var. DECORATA Fer. (pi. 3, figs. 27 and 29) is light 

 colored and shows a band at periphery, usually continuing up the 

 spire above the suture, and often a second faint band below the 

 suture. Figs. 3, 4 of pi. 112, Fer. Hist. ; figs. 5, 6, pi. vii of Phil., 

 Abbild. ; and figs. 20a, 25 of Couch. Icon, represent this form. 



A form also occurs without the peripheral girdle (pi. 3, fig. 23). 

 This has received the name of frater Fer. See Fer. Hist. pi. 112, 

 figs. 1, 2, and Phil. Abbild. iii, pi. 7, fig. 1. 



Compare also, on all these forms, Hidalgo, Journ. de Conchylio- 

 logie 1887, p. 184, 185. 



C. APLOMORPHA Jonas. PI. 12, fig. 11. 



Imperforate, oblong-conic, elongated, solid ; lower two whorls 

 tawny-brown, with broad dark brown bands at suture and periph- 

 ery, and covered witli a thin white cuticle worn into streaks; next 

 earlier whorl light brown, the upper whorls white. 



The spire is long, conical, apex obtuse, Whorls 6. Aperture 

 decidedly shorter than the spire, white within ; peristome expanded 

 and reflexed, white ; columella gently arcuate, not truncated below, 

 white. Alt. 41, diam. 24 ; oblique alt, of aperture 22 2 mill. 



Philippines. 



