524 STUDIES ON AUSTRALIAN MOLLUSCA, IX., 



only in colour, in which character it is variable, from Barleeia 

 imbricata Watson.* 



Alaba martensi Issel,t associated geographically with the fore- 

 going, is apparently inseparable from Diala hardyi Melvill k 

 Standen.J 



Alahafulva Watson, its variety lyijrrhacme Melvill & Standen, 

 and Alaba striata Watson, are to be transferred to Obtortio.% 

 The latter species has occurred at Thursday Island, 



EULIMELLA ANABATHRON, n.sp. 



(Plate xxxiii., figs. 39, 40.). 



Shell tall, slender, opaque, rather fragile. Whorls ten, exclu- 

 sive of a prostrate heterostrophe apex of two whorls, deeply con- 

 stricted at the suture and produced at the periphery into a ridge 

 or crest. Colour white. Sculpture : no spirals; coarse irregular 

 riblets proceed from the lower suture in a backward convex curve 

 to the peripheral crest, thence in a concave curve to the upper 

 suture. Aperture ovate, columellar margin a little reflected, 

 appressed to the preceding whorl. Length 4-8; breadth 1-2 mm. 



Hab. — Balmoral Beach, Middle Harbour (the late Mrs. C. T. 

 Starkey). 



T y p e. — To be presented to the Australian Museum. 



Odostomia opaca, n.sp. 



(Plate xxxiii., fig. 41.) 



Shell cylindro-conic, solid, opaque. Whorls five, exclusive of 

 the protoconch. Colour buff or pale purple, zoned with three 

 narrow spiral lines, one running below the suture on the last four 

 whorls, another on the periphery of the last two whorls, and the 

 other on the base of the final whorl. Sculpture: regularly spaced 

 smooth round prominent radial ribs which project at the suture, 



* Chall. Rep. Zool. xv. 1886, p.584, PI. xliii. f.2. 



t Malacologia Mar Rosso, 1869, p.206; Savigny, Descr. Egypte, PI. iii., f.26. 



X Journ. of Conch, viii. 1895, p. 118, PI. ii., f.lO. 



§ Hedley, Mem. Austr. Mus. iii. 1899, p. 41 2. 



