PRESTON : MOLLUSCA FROM THE MONTEBELLO ISLANDS. 15 



broad, irregular, livid, purplisii bands ; whorls 7, convex, the last 

 slightly descending in front, minutely sculptured with very fine, 

 closely set spiral striae, and marked with fine lines of growth; suture 

 impressed, rather darkly tessellated and margined below ; columella- 

 margin white, arched ; labriim simple, acute ; aperture roundly 

 ovate; interior of shell flesh-coloured. Alt. 20'5, diam. maj. 11*5, 

 min. 9 mm. Aperture : alt. 8*5, diam. 5-5 mm. 

 Sab. — Montebello Islands, Western Australia. 



TUKBO FOLIACEDS, SCABKOSUS, U.Subsp. 



Shell differing from typical T. foliaceus, Phil.,^ in its much more 

 coarsely scabrous sculpture, which gives to the spiral lirse the 

 appearance of being ornamented with broad hollow spines. 



Hab. — Montebello Islands, Western Australia. 



TuKBO FOLIACEUS, HAYNESI, H.subsp. 



Shell imperforate, turbinate, moderately solid, tessellated with 

 yellowish-pink, alternating with broad flame-markings of dark-green 

 shading to olive; whorls 5^, sculptured with two coarse tubercular 

 carinae, and several finer tubercular, spiral lirse, the interstices marked 

 with fine spiral striae, on tlie last whorl the tubercular carinte increase 

 to four, and tbe spiral lirse increase also in number; base of shell 

 convex, sculptured with six levolving, tubercular riblets, and 

 a number of tine strife ; suture narrowly and deeply channelled ; 



coluraella-margin descending in a curve, the inner margin iridescent, 

 the outer margin covered with a thick white callus which is diffused 

 above; labrum acute; aperture rouiully ovate ; operculum multispiral 

 with sub-central nucleus, whorls 4^, the inner side slightly convex, 

 covered with a very thin, deciduous, light-brownish periostracura, 

 marked with arcuate lines of growth, the outer margin of the earlier 

 whorls flatly ridged, tbree such ridges appearing on the last whorl, 

 the outer side white, much thickened, and almost smooth above, 



^ Conch. Cab., '2nd ed., p. 41, pi. xi, figs. 2, 3. 



