118 A?nerica7i Seashells 



Genus Gaza Watson 1879 

 Gaza superba Dall Superb Gaza 



Northern Gulf of Mexico to the West Indies. 



Plate 3 b 



I to 1 34 inches in width. Spire somewhat elevated. Color old ivory with 

 a golden sheen. Early whorls faintly wine-colored. Although formerly 

 thought to be one of our rarest shells, it is now known to be relatively com- 

 mon in the Gulf of Mexico in 50 or more fathoms. It is indeed a beautiful 

 species. 



The rare Gaza (Callogaza Dall 1881) ivatsoni Dall from deep water in 

 the West Indies is illustrated in figure 32a. 



Subfamily MONODONTINAE 

 Genus Tegula Lesson 1832 



Tegula fasciata Born Smooth Atlantic Tegula 



Plate lyp 



Southeast Florida and the West Indies. 



/{> to /4 inch in width. Surface smooth; color yellowish to brown, with 

 a fine mottling of reds, browns and blacks; often with a narrow, pale, spiral 

 band of color on the periphery. Under the lens, spiral rows of alternating 

 red and white, short lines or dots may be seen. Some specimens may have 

 zigzag white bands. Interior of deep, round, smooth umbilicus and the callus 

 are white. Two teeth at the base of the columella. Thick adults may have 

 small teeth just inside the lower margin of the aperture. Whorl may be 

 slightly concave just below the suture. In the young only, the umbilicus 

 has two deep spiral grooves. Moderately common under rocks at low tide. 



Tegula lividomaculata C. B. Adams West Indian Tegula 



Key West and the West Indies. 



% inch in width and about /4 inch in length. Top of whorls sculptured 

 with about a dozen fairly regular, small, spiral cords. The angular periphery 

 of the whorls bears the largest cord. Umbilicus round, deep, and furrowed 

 on its sides by two spiral cords, the upper one ending at the columella in a 

 fairly sizeable bead. Columella set back quite far at its upper half; the lower 

 section bears the bead, and below that there are several, smaller, indistinct 

 beads. Color of shell grayish to brownish white with small mottlings of 

 reddish or blackish brown. Operculum, as in all Tegula, horny and multi- 

 spiral. Formerly scalaris Anton (not Brocchi) and indusi "Gmelin." Com- 

 mon under rocks in the West Indies, but uncommon on the Lower Florida 

 Keys. 



