446 



22. Cancellaria Piscatorum (pi. xciii. f. 33.), Chemu. 

 Conch, t. 10. f. 1151, 1152. C. nodulosa, Lam. Anim. sans vert. 



C. testa ovali, turrita, pone columellam umbilicata ; costis acute 

 noduliferis, ad angulum anfractuum acute elevatis ; apertura 

 magna, postice angulata ; labio externo dentato ; columella tortua, 

 obscure triplicate. Colore griseo, fusco maculato, apertura fusca, 

 albo unifasciato ; margine albo. 



From the sands at the mouth of the river Gambia. The mouth 

 is large and angular, internally of a dark-brown colour, with white 

 edge and one white band in the centre, the spine is formed of 

 very distinctly angulated whorls. The ribs form sharp points at 

 the angles. 



23. Cancellaria gemmulata (pi. xcii. f. 14.), Sowerby, 

 Pro. Zool. Soc. 1832. p. 55. 



C. testa ovato-ventricosa, alba, costis numerosis noduliferis et 

 sulcis elevatis cancellata ; spira breviuscula, anfractibus rotunda- 

 tis ; apertura magna, postice subcanaliculata, interne costata, 

 margine dentato ; columella antice triplicate, postice uniplicata. 



Of an oval form, with smooth nodules formed by transverse 

 ridges passing over regular ribs. Pound in Nocoya bay, in a 

 bottom of sandy mud. 



24. Cancellaria decussata (pi. xcii. f. 3.), Sowerby, Pro. 

 Zool. Soc. 1832. p. 55. 



C. testa ovata decussatim costellata, costis ad juncturam nodu- 

 liferis ; interstitiis quadratis ; spira acuminata, anfractibus ro- 

 tundatis; apertura ovali, interne leviter costata; labio externo 

 crenato ; columella umbilicata, valide triplicata : colore fusco, 

 albo unifasciato. 



Prom Panama and Puerto Portrero, in sandy mud, ten or 

 thirteen fathoms water. Of an oval form, cancellated by equi- 

 distant ridges crossing each other, and forming little knots at the 

 juncture. The insterstices are square and smooth. 



25. Cancellaria elegans (pi. xciii. f. 36. pi. xcvi. f. 104.), 

 Sowerby, Genera of Shells. 



C. testa ovali, minute lineis elevatis acutis decussata; spira 

 acuminata ; anfractibus ad suturam subcanaliferis ; apertura 

 interne costata; labio externo denticulato; columella subumbili- 

 cata, rugosa, triplicata : colore fulvo, albo bifasciato ; apertura alba. 



