COCHLOSTYLA-HELICOSTYLA. 



// mirabUis FKR., Prodr. 320 ; Histoire, t. 31, f. 4-6.-SowB., P. 

 z> g L841, p. 2.--PFR., Conchyl. Cab., p. 288, t. 48, f. 5, 7,9,10; 

 M,,i,,,_rr. i, p. 220. RVE., Conch. Icon,, f. 45. H. fonnosa WOOD, 

 [ndex, Buppl., t. 7, f. 10. H. galactites Lam., An. s. Vert, iv, p. 69. 

 77. pertimilis DII. in Fer. Hist, p. 120, t. HOB, f. 2.Cochlo 8 tyla 

 mirabilia SEMPER, Reis., p. 192. HIDALGO, Obras, t. 49, f. 1-7. 



A globose shell, generally a little higher than broad, and 

 excessively variable in both contour and pattern of coloring. The 

 surfu<v i- "ttni somewhat malleated. The ground-color varies from 

 :1 v-rv li-ht buff to a yellowish-brown. It is allied to C. fulgens, 

 dirt'ei-ini: mainly in the pattern of coloring. 



Sliirht traces of whitish hydrophanous cuticle are observable near 

 the suture in some specimens. 



Tin- principal varieties of banding are these: 



(1.) Unicolored yellow; the earlier whorls white or having a 

 l-m-plc supra-sutural band (fig.85). The earlier whorls are some- 

 times pink. 



(2.) Yellow or buff, with a narrow sutural brown line, a sub- 

 peripheral brown band, and a columellar patch. There are some- 

 times numerous yellow lines also (fig. 79.) 



(3.) Yellow or yellowish-brown, with 4 wide or narrow bands, 

 'Hi- columellar, another sutural, with two intermediate. This is the 

 c'Uiinionest pattern (figs. 81, 86.) 



I. Yellow with reddish bands, Marinduque, (fig. 80.) 

 ").) Entire shell very dark (fig. 84.) 



Ti-o-it* if ion forms to var.fiilyens. 



I'nrm fr!c]ti-on (pi. 31, fig. 38). Having 4 wide or narrow black- 

 Mi-l>rown hands, and three yellowish-brown bands in their intervals. 

 The spe -'linen figured is from Albay, Philippines. The figure on 

 pi. ill is united by error with that of C. tephrodes, below it. 



Another deviation has the three brown or yellowish-brown bands, 

 but no blackish hands (pi. ~>7, fig. 87). 



A very lari_ r e series of these transition forms is before me. 



V\i;. PDLGENS Sowerby, 1M. 38, figs. 79, 80, 81. 



Imperforate, globose or globose-turbinate, solid; ground-color 



bove the periphery, yellowish-brown below it, having normally 



blackish-brown hands, one at suture, one at columella, the other 



encircling the body-whorl at equal distances; the sutural band 



'ii absent, and sometimes additional bands are developed on base 



