111 



duobus, rotundis, solidis ; spird breviusculd, acuminatd ; an/racti- 

 bus superni angnlatis, tuberciilorum serie unicd ad angulum armatis, 

 tuberculis peculiariter plano-vellicatis, acutis, anfractds ultimi 

 valde irregularibus ; anfractibus infra costatis, costis crenulatis, 

 sub tuberculis Jiexuose nodulosis, costarum interstitiis elevato- 

 striatis ; albd, varicibus aurantio-ftisco vivide tinctis ; columelld 

 rugoso-pUcatu, apertura fauce albd, labro irittis fortiter denticit- 

 lato ; canali subelongato, ascendente. 

 Concli. Icon., Triton, pi. 2. f. 5. 



Hab. Cagayan, province of Misamis, island of Mindanao, Philip- 

 pines (found in sandy mud at the depth of twenty fathoms) ; Cuming. 

 The ribs of this delicate species are noduled, and more strongly 

 developed on tlie varices than on the body of the shell ; and the cen- 

 trai dorsal tubercle of the lašt whorl is unusually prominent, -vvith all 

 the appearance of a double tubercle. The canal is much shorter 

 than that of most of the club-shaped Tritons, and is particularly 

 curved or bent upwards. 



Triton Ranelloides. Trit. testo, Ranella/ormi, varicibus decetn 

 nodiferis ; spird elevatd ; anfractibus, superficie totd subtilissimi 

 reticulatd, superiie depressis, infra nodis grandibus biseriatim, an- 

 fractu ultimo triseriatim, cinctis, nodis inferioribus minoribus; 

 luteo-albidd, fuscescente varid, tccniis subtilissimis fuscescente 

 albogue ariiculatis, lineis fuscis fortioribus inter nodos, cinctd ; 

 columelld maculd pmpured albirugosd superne tinctd ; aperturcs 

 fauce albd, labro intus leviter denticulato ; canali brevissimo. 

 Conch. Icon., Triton, pi. 3. f. 10. 



Hab. Matnog, province of Albay, island of Luzon, Philippines 

 (found on the reefs) ; Cuming. 



Partaking as this shell does in almost equal proportion of the 

 characters of both Triton and Ranella, it has been a matter of some 

 difficulty to decide to which of the t\vo genera it might ■with the 

 greater propriety be referred . 



Triton exilis. Trit. testd clavčefornū, varice unico parvo ; spira 

 brevinsculd ; anfractibus superne angnlatis, inferne coarctatis, 

 transversim subirregulariter costatis, costis liris parvis longitudi- 

 nalibus decussatis, tuberculatis, tuberculis grandibus, prominenti- 

 bus,subcompressis ; albd,aurantio-fusco sparsim tinctd; columelld 

 plicatd, plicis superioribus valde majoribus, operlurčs fauce albd, 

 labro intus rugoso-denliculato ; canali longissimo, superne peculi- 

 ariter contorto. 

 Conch. Icon., Triton, pi. 4. f. 11. 



Hab. San Nicolas, island of Zebu, Philippines (found in sandy mud 

 at the depth of ten fathoms) ; Cuming. 



This highly interesting species has been crroneously published by 

 Mr. Sowerby in his ' Genera of Shells,' and by myself in my ' Con- 

 chologia Systematica,' vol. ii. plate 243. fig. 3, for the Triton clavator, 

 and demonstrates how necessary is the examination of an entire 

 genus by comparison for the proper discrimination of the species. 

 No question as to the specific difference of these two shells could 



