TROCHIDAE 119 



T. hotessierana Orbigny from the West Indies is similar, but rarely over 

 Vz inch, with a more rounded periphery, with smaller, neater, equal-sized, 

 smooth spiral threads, and dark bluish black in color, except for a whitish 

 area around the narrow umbilicus. Uncommon. 



Tegula excavata Lamarck Green-base Tegula 



Florida Keys? Caribbean area. 



34 inch in length and width. Characterized by its bluish-gray color, 

 corrugated sculpture (weak spiral cords and oblique lines of growth), its 

 concave base, thin outer lip, and especially by the blue-green to iridescent- 

 green circle of color around the very deep, round, narrow umbilicus. A 

 variant exists in some areas which lacks the green, umbilical color and in 

 which the spiral cords are stronger and the shell with axial, slanting bars of 

 black-brown. Very common in the West Indies, along the rocky shores. 



Tegula funebralis A. Adams Black Tegula 



Vancouver, B. C, to Lower California. 



I to I % inches in length, heavy, dark purple-black in color; smoothish, 

 but with a narrow, puckered band just below the suture. Weak spiral cords 

 rarely evident; coarse growth lines present in large, more elongate specimens. 

 Base rounded. Umbilicus closed or merely a slight dimple. Columella 

 pearly, with two small nodules at the base. A very common littoral, rock- 

 loving species. Do not confuse with T. gallina. 



Tegula gallina Forbes Speckled Tegula 



Plate i8v 

 San Francisco to the Gulf of California. 



I to I /4 inches in length, very similar to funebralis, but a lighter, gray- 

 ish green color with dense, zigzag, axial stripes of purplish. The shell surface 

 is also coarser. A common, southern species found among littoral rocks. 



Tegula brunnea Philippi Brown Tegula 



Crescent City to Santa Barbara Islands, California. 



I to I % inches in length, similar to funebralis, but light chestnut-brown 

 in color with the base often glossy, brownish white. The umbilicus is closed, 

 but usually with a dimple-like impression. Columella usually with only one 

 small tooth near the base. Common at dead low tide on rocks. Usually 

 heavily encrusted with algal growths. 



