70 CANCELLARIA. 



intersections; sometimes the longitudinal ribs are more distant, 

 or give place to undulations, which are more prominent near the 

 suture ; plaits two, strong, raised, narrow ; yellowish white, 

 banded and variegated with rust-brown. Length, l'5-2'5 inches. 



West Indies, Florida. 



I think that G. Eburnaeformis, Reeve (fig. 26), described 

 without locality, is only a rather smooth form of this species. 



C. DECUSSATA, Sowb. PI. 2, figs. 27, 28. 



Cancellated by narrow, prominent, corded ridges ; columella 

 with three moderate plaits ; fawn-color to reddish brown. 



Length 1*5 inches. 



West Coabt of Central America. 



C. ventricosa, Hinds (fig. 28) is a synonym. 



C. INDENTATA, Sowb. PI. 2, fig. 29 ; PL 3, figs. 30, 32. 



Somewhat squarely oblong, narrowly shouldered, scarcely 

 umbilicated, latticed by longitudinal and spiral narrow, raised 

 ridges ; plaits two, prominent ; deep orange-brown. 



Length, 1*25 inches. 



Panama. 



C. cremata, Hinds (fig. 29), appears to be a variety; Reeve 

 has described it or a similar form as C. affinis (tig. 32). This 

 latter agrees well with the description of an unfigtired species 

 described also under the name of C. affinis, by Prof. C. B. 

 Adams, and obtained by him at Panama. 



C. GRAYI, Tryon. PI. 3, fig. 33. 



Spire exserted ; rudely decussated with rough ridges and 

 spiral striae ; reddish brown, the body-whorl obscurely two- 

 banded with white ; columella with three moderately strong 

 plaits. Length, 1*75 inches. 



Baclayon, Island of Bohol, Philippines ; 



17 fms. (Cuming). 



Confounded by Sowerby with C. asperella, Lamarck, an error 

 repeated by Reeve. I have named it after Dr. ,T. E. Gray, one 

 of the earlier monographers of the genus Cancellaria. 



C. CANCELLATA, Linn. PL 3, fig. 34. 



Cancellated bj' distant, narrow, prominent ribs, occasionally 

 varicose, and thread-like spiral ridges ; whitish, with two chest- 



