307 



ON PLANISPIRA {CRISTIGIBBA) BURUENSI8, n.sp., AND OMPHALO- 

 TROPIS HERCULES, n.sp., FEOM THE ISLAND OF BUEU. 



By J. H. PoNSONBT, F.Z.S., etc., and E. E. Stkes, B.A., 

 F.L.S., etc. 



1. Planispira (Cristigibba) Buruensis, n.sp. Fig. I. 



Testa umbilicata, planorbiformis, tenuis, translucens, brunnea, 

 fasciis latis albis duabus ornata et flammulis albis varie picta, circa 

 umbilicum pallidior ; spira depressa, anfr. 4 plani, sutura sat profunda 



^ II. 



Fig. I. Planispira [Cristigibba) Buruensis, n.sp. 

 ,, II. Omphalotropis Hercules, n.s^. 



discreti, primus Isevis, politus, reliqui striis obliquis crebris quasi 

 asperatis sculpti, tres primi sensim accrescentes, ultimus infiatus, 

 magnus, antice subito descendens, pone aperturam cristam elevatam 

 exbibens, gibbosus ; apertura orbicularis, valde obliqua ; peristomate 

 undique expanse et reflexo, albo, margine dextro superne arcuato, 

 basali ad insertionem supra umbilicum cylindricxim, usque ad apicem 

 pervium, leviter dilatato. Diam. maj. 16'5, min. 12-8 mm. ; alt. 

 6"5 mm. 



Hal.— M.0Vini Mada, Burn, at 3,000 feet. 



Var. a. Testa viridescenti-cornea, tenuior, sculptura fere granulata. 

 Diam. maj. 16, min. 13'5 mm. ; alt. 7 mm. 



Hah.— ^ii^ type. 



