44 



the auimals of Triton, Ranella, &c. are represented as if they be- 

 longed to that division of the Gasteropods. 



Ranella celata. 



Tentacles lateral, separated by a short, rather broad, truncated 

 tubular veil ; eyes on the outer side rather above the base ; proboseis 

 short, very large and thick, retracted to the edge of the veil, leaving 

 the tw-o rounded pale processes of its apex exposed, fortning with the 

 veil a rostrum-like projection, very unhke the elougate, slender, 

 cylindrical retracted proboseis of Murex, Purpura, &c. ; hngual 

 iriembrane narrow, elongate ; teeth in seven series, 3 • 1 • 3, close 

 together, rather crowded, the centrai rather narrow, with a centrai 

 prominent denticle, ha^-ing a smaller one on each side of the base ; 

 the lateral teeth subulate, curved. 



Scctibranchiata Rhipidoglossa. 

 Fam. TuRBiNiD.E. 



Imperator, n:s. ? Panama. 



Eve-pedicel thick ; tentacles elongate, slender, frontai lappets trun- 

 cated, broad at the base, about \ the width of the forehead ; foot 

 folded longitudinally behind and transversely in front ; lateral fringe 

 of the right side most distinct; muzzle produced, annidated ; lingual 

 membraue elongate, rather narrow, linear, dark brown ; centrai teeth 

 5- 1 -5, the middle one broad, the side ones narrower, square, all mth 

 a recur\ed tip ; the lateral teeth numerous, hairlike, the inner one 

 •wider. 



Callopoma saxosxjm. Panama. 



Foot folded across in the middle ; back with a hoodlike process 

 coverino- the front part of the operculum, and depositing the external 

 callosity of it ; eyes on short thick pedicels ; tentacles linear, at the 

 npper edge of the eye-pedicel ; frontai lappet truncated, narrow at 

 the base, at the inner side of the base of the tentacles ; lateral fringe 

 on each side, vaih three beards on the middle of the edge ; lingual 

 membrane broad, elongate ; centrai series 5 • 1 • 5 ; the centrai broad, 

 with a recurved tip, the lateral one more narrow, equal ; the lateral 

 teeth numerous, hairlike. 



Fam. Trochid^. 



Tegula pellis serpentis. Panama. 



Operculum horny, thui, orbicular, of many narrow, gradually en- 

 laro'ing whorls ; foot folded together longitudinally when contracted ; 

 eyes on thin elongated pedicels ; tentacles linear, sheathed at the 

 base bv the mner part of the base of the eye-pedicels ; frontai lappet 

 none / lateral fringe of left side distinct, with three beards just be- 

 neath it ; lingual membrane elongate, broad ; teeth in ten longi- 

 tudinal series, in archcd cross ro\vs, elongate, with a rounded apex ; 

 lateral teeth hnear, crowded, arched at the end. 



