110 MONODONTA. 



more concave beneath, and doe^ not possess the peculiar notch at the 

 base of the columeHa characteristic of that form. 



M. ATRoviRENs Philippi. PL 22, figs. 48-50. 



Shell imperforate, orbiculate-conoidal, depressed ; whorls 6, sep- 

 arated by impressed sutures, slightly convex, greenish-black, shining, 

 spirally sulcate, the sulci about 5 on the penultimate whorl ; last 

 whorl much dilated, slightly depressed above, rounded in the middle, 

 very obliquely striate, obsoletely transversely sulcate, slightly convex 

 beneath ; aperture subrhomboidal, lirate within ; lip acute, green ; 

 basal margin thickened within ; columella compressed, white, arcuate ; 

 columellar callous broadly expanded, subdepressed at the place of 

 the umbilicus. Alt. 9, diam. 14 mill. (Fischer.) 



Bay of Tasmania ; Ne^v Zealand. 



Trochus atrovirens Phil. Conclujl. Cab., p. 148, t. 24, f 12. — 

 Fischer Cog. Viv., p. 373, t. 114, f. 1. 



Tsot noted by Hutton. Reported from New Zealand on the 

 authority of Quoy and Gaimard. 



M. piPERiNA Philippi. PI. 22, figs. 39, 40 ; pi. 35, figs. 4, 5. 



Shell small, globose-conic, imperforate, thick, solid, blackish, 

 speckled and maculated all ovei' with yellowish, the body-whorl 

 spirally encircled by two narrow bands of black articulated with 

 orange ; spire short, generally eroded more or less, apex acute or 

 eroded ; whorls 4 to 5, slightly convex, spirally finely striate, the 

 strii3e often almost obsolete ; aperture rounded, outer lip arcuate, 

 acute, thickened within, the nacre inside appearing finely lirate ; col- 

 umella short, oblique, not as wide as usual in this group, quite 

 obviously bluntly toothed in the middle. Alt. 8, diam. 7? mill. 



Fiji and Viti Is. 



T. piperinus Philippi, Zeitschr. f. Mai, 1848, p. 111. — Conchyl. 



Cau., p. 205, t. 30, f. 10.— Fischer, Coq. Viv., p. 260, t. 87, f 3.— 



T. amcenits Gould, Proc. Bast. Soc. K H., iii, p. 107, 1849. — U. S. 



E.tpl. Exped. Moll, p. 187, t. 13, f. 218, 1852. 



A globose-conic, solid little species, not likely to be confounded 

 with any other, as the coloration, form and sculpture are very char- 

 acteristic. Figs. 4, 5, of plate 35, are T. amamus Gld. 



Section Chlorodiloma Pilsbry. 



Latona Hutton, Linn. Soc. N. S. "Wales, ix, p. 368. (Not Latona 

 Schumacher, Essai, p. 156 (1817.) 



