86 ADEORBIS. 



the suture, coiicavely flattened below, with the folds of the growth 

 striae very prominent, umbilicus wide, aperture large, basal. 

 Diam. 4-5 mill. 



A ustralia ; Singajwre (Archer), 



A. ViNCENTiANUS, Angas. PI. 80, fig. 100. 



Widely unibilicated, rather thin, semipellucid, white ; whorls 3, 

 rapidly increasing, the last very large, convex, finely undulately 

 concentrically striated, obtusely keeled below the periphery, and 

 Avith a basal keel surrounding the umbilical region, which is slightly 

 crenated by rude growth-iines ; a|ierture semilunar, the inner lip 

 nearly straight, sinuously angulated above. Diam. 6 mill. 



Aldinga Bay, St. Vincent's Gulf, Australia. 



A. scABER, Phil. PI. 30, figs. 99 a, h. 



White, scabrous, with elevated, subserrated s])iral lines above, 

 and sublamellar incremental lines below, whorls rapidly increasing, 

 the last with acutely angulated periphery. Diam. 3 mill. 



• Panama. 



A. TENUiLiRATUs, Smith. PI. 30, figs. 1-3. 



Moderately unibilicated, yellowish, marked with spiral interrupted 

 lines and oblique radiating streaks of dark olivaceous, base yellowish 

 white, unicolored ; whorls 4, convex, rapidly increasing, with deep 

 suture, obliquely striate, and with thin spiral lirse ; aperture sub- 

 circular, receding at the base, whitish, showing the external mark- 

 ings. Diam. 3 mill. 



Sa7i Christoval, Solomon Is. 



I think this will 2:)rove to be a Trochus ; there are slight evidences 

 of pearly nacre on the specimens before me. 



JJnfigured and doubtful species. 



A. COSTATUS, Garrett. =^Fossarus Garretti, Pease, Manual, ix, 272. 



A, VARius, Hutton. =Fossarina, Manual, ix, 276. 



A. ABJECTA, C. B. Ad. ^^Fossariis, Manual, ix, 274. 



A. STRIATUS, Chemn. z=Circulus striatus, Phil. 



A. iMPERSPicuus, Monts. Sicily^ 



A. Orbignyi, Fischer, Cuba. 



A. pimbriatus, Martens. New Guinea. 



A. PICTUS, Tenisou-Woods. Tasmania. 



