439 



MONOGRAPH OF THE GENUS 

 CANCELLARIA. 



Gen. Char. Molluscum trachelipodum marinum. Testa spiralis, 

 solida, plerumque cancellata, spira brevi, apertura magna, colu- 

 mella spiraliter plicata. Operculum nullum. 



A marine mollusc belonging to the order of Trachelipoda, 

 having a solid, generally cancellated shell with a short spire, large 

 aperture and spirally plicated aperture. No operculum. 



1. Cancellaria cassidiformis (pi. xcii. f. 15.), Sowerby, 

 Pro. Zool. Soc. 1832. p. 53. 



C. testa crassa, sub-turbinata, spira brevi, apice acuminato, 

 sutura canaliculate ; anfractibus angulatis, ad angulum acute tu- 

 berculatis, spiraliter sulcatis; apertura oblonga antice vix emargi- 

 nata, labio interno expanso; columella triplicata; colore fusco, 

 albo unifasciato. 



Thick, turbinated, with a short, sharp spire, the whorls of 

 which are angulated, with sharp tubercles at the angle and a 

 groove at the suture. The aperture is long, with the inner lip 

 spread and the outer Up with slightly raised ridges inside. From 

 Panama. 



2. Cancellaria Spengleriana (PI. xciii. f. 29.), Desliayes, 

 Enc. Meth. p. 185. C. Tritonis, Sowerby, Conch. Illustr. f. 15. 



C. testa sub-ovali, altera atim spiraliter decussata; spira acu- 

 minata, anfractibus angulatis, costatis ; costis distantibus, crassis, 

 ad angulum acute tuberculatis ; apertura ovali, lsevi; columella 

 expansa, obtuse triplicata, granulata; labio externo denticulato 

 postice sub-canalifero, antice paululhm emarginato. Colore 

 pallide fulvo, obscure bifasciato, ad angulum fusco. 



This shell is from Cagayan, Isle of Mindanao. It is decussated 

 by spiral lines crossing thick, distant ribs ; the whorls are strongly 

 angulated near the suture, and the ribs sharply tuberculated at 

 the angle ; the folds on the columella, winch is granulated, are 



