MONOGRAPH OF THE GENUS STROPHIA. 
77 
19. STROPHIA FUSCA Novo. 
Brown Strophia. 
Plate VII, 19 & 19a, shell; Fig. 12; A, front, B, left side. 
DESCRIPTION. 
Sp. Ch. Size, medium. Shell, not very heavy. Striations, pres- 
ent. Teeth, two and long. Whirls, 11. Examined 46 specimens. 
Form of shell, a pointed cylinder with the first 
whirl the largest in diameter, and the next two 
are successively smaller; thus the shell tapers to 
a rather acute point, making an angle of about 50 
degrees The striations are not numerous, 17 on 
the upper whirl, quite prominent, not regular, nor 
arranged in lines, and the interspaces are about 
twice as wide as the prominences. The striations 
are rounded and slightly furrowed. 
Aperture, small, but measures a trifle more 
just within than at the entrance. Lower tooth, Fig. 12. 
prominent, .05 high by .25 long, and its position is just a little to the 
right of the center; the upper is placed well above it but is not as prom- 
inent, } 7 et makes a complete turn around the column. 
Margin, not produced forward beyond the diameter of the shell, is 
slightly inclined to the right, is rather thick measuring. 06, and the out- 
er posterior portion is provided with a thin, not prominent edge. The 
frontal bar is not well developed and is smooth within. 
Color of shell externally, brown, paler at the apex, and with the stri- 
ations white; internally, pale brown which gradually fades into flesh col- 
or on the teeth and margin. 
DIMENSIONS. 
Size of type, 1.25 by .45. Largest specimen, 1.35 by 55; smallest* 
.90 by .42. Greatest diameter, 1.35; smallest, .42. Longest specimen, 
1.35; shortest, .90. 
B 
OBSERVATIONS. 
There is considerable variation in this singular Strophia in respect 
to size, as shown, and specimens are inclined to be shorter and more 
obtuse, in proportion to the size, and more cylindrical. Some show a 
thicker margin. 
Known from all other species, by the brown color with contrasting, 
wide apart, white striations, and long teeth. 
