445 



19. Cancellaria mitriformis (pi. xciii. f. 24. var. f. 35.), 

 Sotverby, Pro. Zool. Soc. 1832. p. 51. C. uniplicata, Sowerby, 

 P.Z.S. 1832. p. 173. 



C. testa oblonga, costis longitudinalibus et transversis numerosis, 

 subnoduliferis cancellata ; spira acuminata ; anfractibus angulatis ; 

 apertura hevi ; labio externo dentato, emarginato ; columella antice 

 producta, crenulata, irregulariter bi-plicata ; colore brunueo ; 

 variat nigricante. 



Prom Panama. In the variety named C. uniplicata, by Mr. 

 Sowerby, senior, there is an indication of a second fold, which in 

 an intermediate specimen becomes more decided : the gradation 

 in other respects leaves no doubt on the mind of the describer of 

 C. uniplicata, that, however different the dark-coloured specimens 

 may appear, they are but incompletely formed varieties of C. mitri- 

 formis, which is one of the most beautiful, as well as rare, of the 

 Cancellarice in Mr. Cuming's collection. 



20. Cancellaria clavatula (pi. xcii. f. 13 ; pi. xcv. 

 I 67.), Sowerby, Pro. Zool. Soc. 1832. p. 52. 



C. testa, elongata, clavata ; costis longitudinalibus transverse 

 striatis ; varicibus raris elevatis : spira acuminata anfractibus 

 angulatis : apertura interne lasvi, prope marginem dentata ; labio 

 externo emarginato, columella, bi-plicata. Colore fulvo vel fusco 

 bibneato. Variat striis ad costas acute elevatis. 



Prom Panama and Payta, where it was taken up from sandy 

 mud in seven fathoms water. Like the last species it is slender 

 in form. It has elevated varices at different periods of growth, 

 like those in the genus Triton. The mouth is laterally prominent. 

 Pig. 67 represents a variety with the crossing stria? elevated into 

 points at the angle of the whorls. 



21. Cancellaria tteniata (pi. xcv. f. 75, 76.), Soiverhi, 

 Pro. Zool. Soc. 1848. 



C. testa oblonga, turrita; costis numerosis, transverse striatis 

 ad angulum anfractuum acute angulatis ; spira, acuminata, apice 

 mammellifera ; apertura interne laevigata, margine acuto, columella 

 lsevi, biphcata. Colore pallidissime fulvo, fusco taeniato. 



Shell oblong, turretted, with numerous transversely striated ribs, 

 which are elevated into acute points at the angle of the whorls. 

 The colour is disposed in transverse narrow bands on a very pale 

 ground. Locality unknown. 



