OF NEW SOUTTT WALES. 3 



On an Australian variety of Nerttina pulltgera, Linn. 



By the Rev. J. E. Tenison- Woods, F.G.S., F.L.S., Cor. Mem. 



Lin. Soc, KS.W., &c. 



The following new variety of Neritina was obtained by Robert 

 Johnstone, Esq. (and sent to the Curator of the Sydney Museum) 

 in the mountain streams of the Bellenden Kerr Ranges, 

 Northern Queensland. 



JSTeritina pdlligera, var. sulcata, n. s. 



N. t. caly^triformis, crassa, tumida, vix ohliqua, 7}iarginem versus 

 latiore, jjeriostraca olwacea, parum nitida, G07icolor, liaud erosa, 

 concinne ind%da ; spira omnino occlusa ; anfr. 2 ? regulariter 

 oblique, conspicue, late sulcatis, sulcis rotundatis, loevib. ; aperturoj 

 polita, ampla, expansa, semilunaris luteo-aurantiacea, cceruleo-alba 

 anguste marginata ; area columellaris p-lanata, intense cceruleo- 

 atrata, ad apiceni conspicue, lateque callosa ; peristoma acuiuvi, 

 Jabro superne canaliculato, retroque curvato ; labia acuto, dentibus 

 parvis, inconspicuis, numerosis m^unitis. Operculum testaceum, 

 olivaceum, politum, Iceve, vel tenuissime striatum, fasciis intensiorbus 

 spiraliter ornatum ; apice postico, marginali. 

 ■ Maj. diam. 24-30, min. 18-24, alt. 11-15, millim. 



Shell cup -shaped, thick, a little oblique, tumid, broader 

 towards the margin, neatly covered by an olive, slightly shining, 

 periostraca, which is not eroded ; spire altogether hidden ; whorls 

 two, regularly, obliquely broadly sulcate ; sulci rounded, smooth ; 

 aperture polished, ample, expanded semilunar, yellowish orange, 

 narrowly margined with blueish white ; columellar area flattened, 

 of an intense blue-black, with a conspicuous broad callosity 

 behind ; peristome sharp ; labrum channelled above and curved 

 back, lip sharp with many fine small teeth. Operculum testaceous, 

 olive, shining, smooth, or very finely striate, and ornamented 

 with dark bands ; apex posterior and marginal. 



This shell is a variety of N. pmlligera, Linnseus, but the 

 difierences are that our shell is yellow, not purple in the throat ; 

 the aliform prolongation of the labrum is much less marked, in 



