MOLLUSCA.-HEDLEY. , j j 



The elbows pointing to the right are filled in with three or four 

 longitudinal strokes. Two spiral bands are indicated by the 

 darkening of one line of markings near the shoulder and of 

 another above the centre. Complete gradations occur 

 between this pattern and one in which the cross strokes and 

 dark spirals are both absent, while broader, fewer, orange 

 lines describe fewer and larger angles. In form the shell 

 passes through a metamorphosis. For about three whorls it 

 is rolled in the same plane, thus exposing above the summits 

 of previous whorls in a flat spire. Passing from a subcvlin- 

 drical to an ovate shape, the whorl commences to ascend. A 

 callus pad proceeding from the inner lip is piled on the summit. 

 The axis of the shell is marked by a slight depression from 

 beside which the lip springs. A spiral crest, to which the 

 growth stria? are brushed backwards, runs from the vertex 

 around the summit. 



The columella plaits are \-ariable. Two prominent ones 

 always appear at the anterior extremity, above these and 

 decreasing in size posteriorly there may be from one to seven., 

 the uppermost usually too deep-seated to be visible externallv. 

 The inner margin of the lip is finely denticulated for the whole 

 length by about twenty tubercles. In the voung stage the 

 throat is grooved to correspond. Length S'^, breadth 5 mm. 



This species ranges west to Cape Lewin and north along the 

 West Australian coast to the tropics. It is well known from 

 the beaches of the latter region. Australian collectors have 

 commonly received it through Tryon and Brazier's identi- 

 fication as M. sagittata. Hinds. But that is a native of the 

 tropical West Atlantic, ^ and in colour pattern does not 

 correspond. The record of .'\/. sagittata, from Hao in the 

 Paumotus, by Couturier, 2 appears to me to need confirmation. 



M. pulchella, Kiener, from Norfolk Island, ■^ is near this, 

 but is narrower above and appears to have a regular involute 

 growth. In many respects the description of Marginella 

 litiirata, Menke,^ agrees, but that unrecognised West Aus- 

 tralian shell is excluded b\' "spira breve conica." 



CONL'S SLPERSTES, Sp. IIOV. 



(Plate XX., figs. 35, 36.) 



Shell small, solid, regularly conical, angled at the shoulder. 

 Apex mamillate smooth, two whorled, slightlv oblique. 

 Sculpture: The whole shell is decorated with flat spiral cords 



1 Smith— Journ. Linn. Soc. xx., 1890. p. 489. 



2 Conturier— Journ. de Conch., Iv., 1907, p. 132. 



3 Brazier— Proc. Linn. Soe. N.S. Wale.s (2), ii., 1888, p. 997. 



4 Menke— Moll. Nov. Holl., 1843, p. 28. 



