STROMBUS mutabilis, 

 Little pink-7nouthed Strombus. 



Generic Character. — See PI. 10. 



Specific Character. 

 S. anfractu basali nodosa ; spird brevi tantum non Iceii ; Uned sulcata 



suturce parallcld ; labio exteriore svpra gibbo, margine recto, inte- 



riore crasso,cum exteriore striata; apertura pallide rubicundd, basi 



truncatd. 

 Basal whirl nodulous; spire short, nearly smooth, with a sulcated line 



parallel with the suture; outer lip above gibbous, the margin 



straight; inner lip thick, both striated ; aperture flesh colour; 



base truncated. 

 Seba, tab. Gl.Jg. 2Q Sf 27, 32 Sf 33, 54. tab. 62. Jig. 42 S^^ 43? 



Martini 3. tab. 17, 199. Jig. 78, 807. Knorr. 2, J4. fig. 3. 



Rump. 37. W. ^ 



1 HE specific distinction given by Linnaeus to Strombus urseus 

 is so loose, that his followers have referred all the small 

 species of this genus to the numerous varieties he has quoted, 

 though few will doubt that many permanent species have been 

 thus overlooked; among these the one now characterized is 

 an example, the most striking distinctions of which are in the 

 spire being never plaited, and always much shorter than the 

 mouth, which latter is either nearly white, or of a flesh colour; 

 in its external colouring no two specimens will be found alike. 

 It is not an uncommon shell from the East Indies, and seldom 

 grows larger than the figure. 



STROMBUS dilatatus, 

 Wi7iged Strombus — middle Jigures. 



S. tcitd transverse striatd ; spird mediocri, plicis numerosis gracibus ; 



labio exteriore dilatato, rotundato, crassissimo, rejiexo; inter iore 



supra crassescente, medio Icexi ; aperturd striatd. 

 Shell transversely striated; spire moderate, with slender numerous 



plaits; outer lip dilated, rounded, very thick, and reflected ; inner 



lip thickened above, smooth in the middle; aperture striated. 



A N undescribed species, and of the greatest rarity, for I have 

 never seen any other specimen, than one in my own cabinet, 

 altliough perfect in form, it is obviously faded in colour ; yet 

 it is too remarkable to be mistaken for any other of this inte- 

 resting family, which requires so much iUustration. 



PI. 71. 



