234 GIBBULA. 



Turbo lehmanni Menke, Moll. Nov. Holl., p. 18. — Trochus 

 lehmanni Philippi, Conchyl. Cab., p. 185, t. 28, f. 15. — Fischer, 

 Coq. Viv., p. 362, t. Ill, f. 3 (not Trochus lehmanni Menke, Moll. 

 Nov. Holl,, J). 18, nor T. lehmanni Kiener, Spec, genre Trochus, t. 

 46, f. 2).— Gibbula jndchra A. Ad., P. Z. S. 1851, p. 187. 



G. TESSERULA Tenison-Woofls. PL 32, figs. 66-68. 



Shell small, shining, obliquely depressed, deeply umbilicated, 

 thin, l)]ackish, with a kind of a purple iridescence, conspicuously 

 marked with a line of large square black and white spots at the 

 periphery; whorls 3 J to 4, convex, regularly and distantly spirally 

 striate, decussate transversely with close fine lines. Outer lip thin, 

 crenulate, inner lip reflexed and curved, scarcely separated from the 

 labrum ; aperture subquadrate, tessellate inside with a fine iridescent 

 film ; base smooth, polished and convex. 



Alt. 4 mill. {T. Woods.) 



Tlie depressed form of this shell and its conspicuous tessellations 

 distinguish the species from the many forms of Gibbula we have in 

 the Australian Seas. G. depressa described by me is a dark tessellated 

 form, but it is widely sulcate. {T -Woods.) 



G. tesserula T.-Woods, Trans, and Proc. Roy. Soc. Victoria, 

 xvii, 1881, p. 81, t. 1, f. 3-5. 



The figures of this shell are much enlarged. Tenison-Woods 

 does not give the locality, but it is presumably Tasmania or Eastern 

 Australia. 



G. DEPRESSA Tenison-Woods. PI. 40, figs. 36, 37. 



Shell narrowly umbilicate, depressed, thin, lusterless, whitish, 

 mottled and somewhat radiately streaked with blackish-brown and 

 crimson, periphery whitish, with or without a series of dark blotches ; 

 base olive or brown, sometimes tessellated with a darker shade ; 

 spire very low, short ; apex minute, subacute ; sutures narrowly im- 

 pressed ; whorls about 4, the last very rapidly tvidening, with several 

 (6 or fewer) coarse but superficial spiral lirse above, and about 6 

 narrower, still less conspicuous ones beneath ; periphery more or 

 less distinctly biangular ; aperture large, subquadrangular, quite 

 oblique ; iridescent and sulcate within, the lip thin, fragile, bordered 

 inside by a thin opaque band ; columella thin, a little straightened, 

 umbilicus narrow, not bounded by a distinct rib or carina, smooth 

 within. Alt. 4, diam. 6j mill. 



Tasmania. 



