112 



hovvever be urged, for they vary materially both in form and detail 

 of sculpture. The Triton clavator is comparatlvely fuU and ventri- 

 cose, with the upper ribs only moderately tubercled ; the Triton ex- 

 Uis is small, peculiarly contracted round the lo^er part, with the 

 tubercles very prominently developed entirely across the whorls : in 

 the former species there is a varix on the penultimate whorl as ■well 

 as upon the lašt -^'horl ; in the latter species, as in the Triton cana- 

 liferus, there is no varix upon the penultimate whorl ; lastly, the 

 mouth of the former species is either yellowish or yellowish scarlet, 

 \vhilst that of the latter exhibits not the slightest indication of colour, 

 and the stains of orange-brown with which it is marked externally 

 are of a character not to be misunderstood. 



Triton Pfeifferianus. Trit. testd fiisiformi, varicibus septem 

 promiiientibus, acutangularibus ; sjnrd elatd ; anfractibus subirre- 

 gulariter convolutis, convexis, superni plano-depressis, leviter 

 canaliculatis, transversim costulatis, costulis irregularibus, nunc 

 angustis, niinc latioribus, striis elevatis longitudinalibus noduloso- 

 decussatis, anfractuum parte mediand nodosd, nodis distantihus, 

 longitudinaliter subplicatis ; fuscescente, fiisco pallide varia ; colu- 

 melld rugulosd, labro intiis ritgoso-denticulato ; canali siibelongato . 

 Conch. Icon., Triton, pi. 4. f. 14. 

 Reeve, Pro. Zool. Soc, 1844. 



Hab. ? 



This species may probably be recogtiised as one of not uncommon 

 occurrence, though not hitherto described ; its leading features are 

 the rude manner in which one -vvhorl is deposited on the other, the 

 prominent sharp-angled structure of the varices, and the delicate 

 granulated sculpture of the ribs where they are crossed by the raised 

 strise ; 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 gentle- 

 man has exercised in arranging the synonyms of the genera Triton 

 and Ranella in his " Memoir of the genus Tritonimn," Revue Zoolo- 

 gique de la Sociėtė Cuvierienne. 



Triton Sauline. Trit. testd elongato-conicd, tubceformi, paululum 



contortd, basim verstis subangulato-attenuatd, varicibus novem 



decemve plano-depressis ; spird acuminatd ; anfractibus subangu- 



latis, nodorum prominentium seriebus diiabus infra angulum arma- 



tis, subtilissime liratis, liris apiccm versus minutissiinc crenulatis ; 



albido ant lutescente, rubido-fusco variegatd et maculatd ; epider- 



mide temti ; columelld Icevi, obsolete j)licatd, plicd albd unicd su- 



pernemunitd; labro intus denticiUato ; aperturd angulato-ovatd, 



fauce C(crulescente-albd. 



Conch. Icon., Triton, pi. 5. f. 17. 



Hab. Matnog, island of Luzon, Philippines ; Cuming. 



I was about to figure a somewhat discoloured specimen of this 



shell, collected by Mr. Cuming at the above-mentioned locality, \vhen 



a smaller but very richly painted example presented itself for com- 



parison from the collection of Miss Saul. It is unąuestiouably di- 



