CLATHURELLA. OTT 
having a single whorl, globular, and partially umbilicate, with a 
roundish mouth and an incomplete canal like that of Ianthina. 
The fry, when in the capsule, are very restless, and gyrate freely 
by means of their ciliated front lobes.—JErrreys, Brit. Conch., 
iv, 369. 
Var. MAsor, Requien. Nearly double the usual size. 
Var. BREVIS, Requien. Shell short. 
Var. #QUALIS, Jeffreys. Broader, with more rounded whorls 
and closer, less prominent sculpture than the type; apex 
yellowish white, colored lines regularly distributed and of 
a paler hue, or altogether wanting. Includes vars. inter- 
media and pallida of Forbes and Hanley. 
Var. viotaced, Monts. Dark violet. 
Var. RUBROLINEATA, Monts. Revolving lines red instead of 
chestnut. 
C. concinnA, Scacchi. PI. 34, fig. 85. 
Longitudinal ribs rounded, not very prominent, distant, 
revolving lines fine and numerous, canal very short, aperture 
wide, lip rather thick, smooth within, with shallow sinus; grayish, 
with interrupted bands and lines of chestnut. Length, 13 mill. 
Mediterranean Sea. 
Some authors consider this a var. major of the preceding 
species, but it appears to be sufficiently distinct in other respects 
besides that of size. 
C. puicata, C. B. Ad. PI. 30, fig. 98; Pl. 18, fig. 92. 
Longitudinal ribs 11-12, prominent, crossed by about the same 
number of strong, thread-like ridges, the intersections sometimes 
produced into nodules ; reddish chocolate, interior dark chocolate. 
Length, 6-8 mill. 
New England to Tampa Bay, West Coast of Florida. 
The shell is only whitish in dead specimens. Prof. Adams 
changed the name to plicosa, because Lamarck described a fossil 
Pleurotoma plicata ; of course, in Clathurella the original name 
can still be used. The synonyms include C. brunnea, Perkins, 
and C. Jewetti, Stearns (Pl. 18, fig. 92), the latter found on 
oysters at Tampa Bay, Fla. 
