COLUIVrBELLA. 10*1 



the contrary, a rather small form, thin, but with rugose growth- 

 lines decussating the surface a not unusual variety. Other 

 synonyms are C. zulmi.*, Duclos (fig. 33), G. affinis, Risso, C. 

 incMbitantes, Martini, (L Gualteriana, Risso? 



0. DYSONI, Reeve. PI. 44, fig. 57. 



Shell I'usirormly conical, yellowish white, painted with waved 

 stripes of red-brown spots, spire short, sharp, whorls strongly 

 spirally grooved throughout ; aperture elongated, lip flatly 

 thickened, denticulated within. Length, 16 mill. 



Honduras (Dyson). 



J think this will prove to be a C. mercatoria , of somewhat 

 unusual form :md not adult. 



C. RUSTTCA, Linn. PL 43, figs. 34-49; PI. 44, figs. 50-56. 



Shell variable in shape, sometimes short, with broad body- 

 whorl, sometimes narrower, with spire and lower part of body- 

 whorl produced; smooth, or slightly spirally striated; white to 

 orange-color, stained with chestnut or chocolate, forming spots, 

 longitudinal zigzags and blotches, frequently light banded and 

 fasciculated with chestnut next below the suture; lip white, 

 yellowish or flesh-color, the interstices of the dentic illations 

 chocolate-color. Length, '5-1*1 inches. 



West Indies, West Africa, Cape Verd Is., Southern Europe, 



Mediterranean Sea. 



One of the most variable of shells. The shorter, broad forms 

 are often very close in shape and coloring to C. mercatoria, but 

 are always distinguishable by the smooth surface and the dark 

 interstices of the lip-teeth. 



The synonymy is enormous, including : C. spongiarum,T>uc]os 

 (fig. 39) ; C. Azorica, Drouet (fig. 40) ; C. aureola, Duclos (fig. 

 41) and C. tumida, Reeve, not Duclos (fig. 42); C. striata, 

 Duclos (figs. 43, 44) ; C. cornea, Kiener (fig. 45) ; G. luteola, Kiener 

 (fig. 46); C.fustigata, Kiener (fig. 47); C. modesta, Kiener (fig. 

 48); C. ambigua, Kiener (fig. 49); C. vestalia, Duclos (fig. 50); 

 C. simpronia, Duclos (fig. 51); C. nucleus, Kiener (fig. 52); 

 C. rasolia, Duclos? (fig. 53); besides a number of unfigured 

 species, including probably G. Adansoni and C. rufa, Menke, 

 from the Cape Yerd Islands. C. reticulata, Lam. (fig. 54), said 

 to come from Brazil, has some characters in common with G. 



