CANCELLAR1A. 75 



C. PURPURIFORMJS, Yal. PI. 4, fig. 56. 



Longitudinally obsoletely plicate, spirally linearly grooved ; 

 brownish white. Length, *75 inch. 



Ha b. unknown. 

 C. CORRUGATA, Hinds. PI. 4, fig. 57. 



Oblong pear-shaped, imperforate, longitudinally obsoletely 

 wrinkled, decussated with spiral impressed lines ; aperture 

 ridged within, columella two-plaited ; fulvous olive. 



Length, 22 mill. 



Buy f Guayaquil. 



This is the type of the S. G. Massyla, H. and A. Adams, but 

 it may as well go in this group, the distinctive characters being 

 of little value. 



C. TESSELLATA, Sowb. PI. 4, figs. 58-60. 



Whorls granosely decussated; whitish, banded and sometimes 

 tessellated with chestnut. Length, 1 inch. 



West Coast of Central America, 7-10 fms., sandy 



mud (Cuming); La Paz, Gulf of California (Stearns). 



The type of S. G. Aphera, H. and A. Adams, but having no 



good characters by which to separate it from the present group. 



Subsection NARONA, H. and A. Adams. 



C. CLAVATULA, Sowb. PL 4, fig. 61. 



Obtusely longitudinally ribbed, here and there irregularly 

 varicose, spirally striated ; columella two-plaited ; chestnut- 

 color, narrowly white-banded at the shoulder angle and on the 

 middle of the body-whorl. Length, 25-35 mill. 



Panama. 

 C. UNIPLICATA, Sowb. PI. 4, figs. 62, 63. 



Spire turreted, whorls concavely shouldered, closely decus- 

 sated by nodulous ridges, the spiral ones forming a serrated 

 outer lip ; coluraella one- or obscurely two-plaited ; chestnut or 

 chocolate-color, interior purplish chocolate. 



Length, 1 '25 1*75 inches. 



Panama. 



C. Mitrxformis, Sowb. (fig. 62), is identical; Mr. Crosse 

 changed its name to C. Sowerbyi, because the former name is 

 preoccupied by Brocchi for a fossil species. 



