TRITON.— Plate IV. 



sim costulatis, costulis irregularibus, mine angustis, 

 mine latioribvs, striis elevatis longitudinalibus nodu- 

 loso-decussatis, anfractuum parte mediand nodosd, 

 nodis distantibus, longitudinaliter subplicatis ; fus- 

 rescente, fusco pallidi varid ; columelld rugulosd, 

 labro intiis rtigoso-denticulato ; canali subelongato. 

 Pff.iffer's Triton. Shell fusiform, with seven promi- 

 nent sharp-angied varices ; spire raised ; whorls 

 rather irregularly convoluted, convex, flatly de- 

 pressed round the upper part, slightly canaliculated, 

 transversely finely ribbed, ribs irregular, sometimes 

 narrow, sometimes wider, nodulously crossed with 

 raised longitudinal stria;, middle portion of the 

 whorls knobbed, knobs distant, longitudinally sub- 

 plicated ; very light brown, palely variegated with 

 brown ; columella wrinkled, lip rugosely denticu- 

 lated ; canal rather elongated. 



Reeve, Pro. Zool. Soc, 1844. 

 Hab. ? 



This species may probably be recognised as one of not 

 uncommon occurrence, though not hitherto described : 

 its leading features are the rude manner in which one 

 whorl is deposited on the other, the prominent sharp- 

 angled structure of the varices, and the delicate granu- 

 lated sculpture of the ribs where they are crossed by the 

 raised striae ; and its general appearance is altogether 

 peculiar. 



I take the liberty of dedicating this characteristic 

 species to Dr. Pfeiffer of Cassel, Germany, on account 

 of the diligence that gentleman has exercised in ar- 

 ranging the synonyms of the genera Triton and Ranella 

 in his " Memoir of the genus Tritonium," Revue Zoolo- 

 gique de la Socie"te Cuvierienne. 



