222 Zoological Society. 



expanso ; columelld biplicatd, sed plied tertid inferiore ohsoletd; 



plied superiore in dente aeuto desinente, sinu inferiore magno ; um- 



bilico parvo. Axis 16 lin. 



Hah. The west coast of America, between 12° 2' and 21° 32' north 



latitude ; viz. Gulf of Papagayo, in from eight to fourteen fathoms ; 



San Bias, in seven fathoms. 



The elevations which cross this shell are remarkably disposed. If 

 the finger-nail is driven over the shell, from the base towards the 

 apex, it meets with no resistance, but if in the contrary direction it 

 is obstructed at every elevation. The squareness of the last whorl 

 and the straight outer lip have a mutual relation, since they are de- 

 pendent on each other ; and these characters, taken collectively, will 

 be of value in making a diagnosis between nearly allied species. 

 Cancellaria albida. Cane, testd oblongd, suhattenuatd, eaneel- 

 latd, albeseente ; anfraetibus septenis, interstitiis transversis vel 

 subquadratis ; aperturd oblongd ; labro aeuto, intus suleato ; eolu- 

 melld biplicatd, plied tertid inferiore obsoletd ; umbilieo minimo, 

 suboeeulto ; eanali medioeri, contorto. Axis 13 lin. 

 Hab. The west coast of America, between 2° 47' south, and 9° 55' 

 north latitude ; viz. Bay of Guayaquil, Panama, and Veragua, in from 

 seven to twenty- three fathoms. 



Cancellaria cremata. Cane, testd oblongd, suhattenuatd, fused, 

 lueidd ; anfraetibus quinis, caneellatis, interstitiis magnis, trans- 

 versis vel subquadratis ; aperturd oblongd, superne plied unicd ; 

 lahro intus sulcis subdistantibus, labio interno expanso ; columella 

 triplicatd ; umbilieo medioeri; eanali breviusculo. Axis 10 lin. 

 Hab. Bay of Panama ; from a muddy bed in from four to ten fa- 

 thoms. 



The figures in the * Conchological Illustrations,* Cancellaria 9 and 

 10, appear to me to represent two distinct species, both of which were 

 collected in the Sulphur. Fig. 10 corresponds more closely with the 

 description of C. indentata, and'to this I would limit the species. The 

 opinion which I had formed from the specimens in my own posses- 

 sion, became fully confirmed in the examination of those in Mr. Cu- 

 ming's collection, and a fine shell belonging to him enables me to 

 enrich the description. It may be desirable to remark that M. Kie- 

 ner has copied both figures, and assigns them to one species. 



Cancellaria corrugata. Cane, testd bucciniformi, fused ; an- 

 fraetibus quaternis, subventricosis, rugis parvis longitudinalibus 

 confertis indutis, lineis impressis decussatis ; aperturd oblongd, 

 fused; lahro intiXs suleato; columelld plicis duahus albidis instruetd; 

 umbilieo nullo ; eanali medioeri. Axis 8 lin. 

 Hah. Bay of Guayaquil. From seven fathoms ; mud. 



Cancellaria elata. Cane, testd ovatd, elongatd, aeuminatd; an- 

 fraetibus septenis eostatis, superne angulatis, lineis elevatis decus- 

 satis ; suturd profundd ; aperturd ovali ; peritremate superne dis- 

 juneto ; labro intus suleato ; columelld triplicatd, plied inferiore 

 maximd; umbilieo parvo, suboeeulto; eanali injlexo. Axis 9 lin. 



Hah. A single specimen was obtained at Panama, from thirty fa- 

 thoms. 



