CLASS GASTROPODA 
173 
Genus HALISTYLUS Dali, 1889 
Shell small, cylindrical, holostomate, polychromatic; operculum multi¬ 
spiral, coriaceous; dental formula — , . - 7 -— 
Type. Halistylus columna Dali ( Proceedings of the United States 
National Museum, 12 :341.) 
Distribution. Queen Charlotte Islands, British Columbia, to Panama 
Bay on the west coast of North America. 
Described as a subgenus of Cantharidus Montfort. 
Halistylus subpupoideus Tryon, 1887 
Tryon, Manual of Conchology, 9:394; PI. 60, fig. 77. 
Whorls about 6, convex, closely spirally striate, thin, light olivaceous 
or brownish, with a series of chestnut spots under the suture; lip simple, 
sharp. Length, 6 mm. (Tryon.) 
Type in Academy of Natural Sciences, Philadelphia. Type locality, 
Monterey, California. 
Range. Queen Charlotte Islands, British Columbia, to Panama Bay. 
Described as Fenella pupoidea Carpenter, which was preoccupied. 
Genus TEGULA Lesson, 1832 
Shell conical, spire pointed, with revolving granulated ribs; columella 
spirally twisted, terminating anteriorly in a large obtuse tubercle. (Tryon, 
Structural and Systematic Conchology .) 
Type. T. pellis-serpentis Wood. 
Distribution. Western tropical America. 
Subgenus Chlorostoma Swainson, 1840 
Tegula funebrale A. Adams, 1854 
Plate 98, figs. 8, 9 
Proceedings, Zoological Society of London, 316. Tryon and Pilsbry, Manual of 
Conchology, 11:170; PI. 28, figs. 42-44. 
C. testa turbinata, imperforata, nigra, glabra, longitudinaliter oblique 
striata, ad suturas crenulata, anfractibus convexiusculis, ultimo rotundato, 
basi planiusculo, regione umbilicali valde impressa, callo albo obtecta; 
columella superne sinuata, antice bituberculata, tuberculo supremo promi- 
nente; labro nigro marginato. (A. Adams.) 
This species is similar to C. gallina in form and character of the 
aperture. It is lusterless, purple or black, the apex usually eroded, orange- 
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