174 



DESCRIPTIONS OF SIX NEW SPECIES OF MARINE MOLLUSCA 

 FROM THE COLLECTION OF THE LATE ADMIRAL KEPPEL. 



By G. B. SowERBY, F.L.S. 



Read lOth June, 1904. 



Triphoka princeps,' n.sp. 



Testa perelongata, sinistrorsa, strarainea, postice fusco-tincta, lineis 

 nifo-fuscis numerosis longitudinalibus panim obliquis picta ; anfractus 

 circa 40, planulati, sulcis longitudinalibus parum obliquis hie illic 

 foveolatis insculpti, cingulis 4 interruptis pseudo-nodulosis, aliquanto 

 irregularibus, insequalibus, duo inferioribus majoribus, instructi ; 

 anfractus ultimus infra sub-acute angulatus, ad angulum bicarinatus, 



infra angulum subconcavo-constrictus, carinis 2 aliquanto robustis 

 munitus ; rostrum longiusculum, contorto-reflexum ; apertura sub- 

 quadrata; labrum tenue. Long. 57, diam. maj. 7 mm. 



ITab.—? 



This is by far the largest known speQies of the genus. Unfortunately, 

 with the unique specimen there is no indication of its habitat, but it 

 is not improbable it may have been dredged off Ascension Island, as 

 it was found in Admiral Keppel's cabinet in close proximity to shells 

 so labelled. Besides its remarkable size, the shell is very distinct in 

 character. The longitudinal brown pitted grooves intersect the spiral 



1 Triphora, Blainville (1828) = Triforis, Deshayes (1834). See Hedley, "Studies 

 on Australian MoUusca" : Proc. Linn. Soc. New South Wales, 1902, pp. 006-8. 



