RISSOIA. 339 



Subgenus SABAN^A, Leach, 1847. 



R. FLAMMEA, Frauenf. PI. 63, fig. 64. 



Thick, smooth, subpellucid, shining, vivid brick red ; whorls 5, 

 subgradate, with incised suture ; lip a little thickened. 

 Length, 2 mill. 



Botany Bay. 

 R. INCIDATA, Frauenf. PI. 63, fig. 65. 



Conoidal, thick, smooth, brownish ; whorls 5, flattened, suture 

 and periphery channeled ; lip thickened. Length, 1'4 mill. 



Botany Bay. 

 Section CORENA, A. Ad., 1870. 



R. TUBERCULIFERA, A. Ad. (unfigured.) Gulf of Suez. 



Section AMPHITHALAMUS, Carp., 1865. 



R. MICROTHYRA, Martens. PI. 63, fig. 69. 



Smooth, a little shining, brownish corneous, sometimes with a 

 white thread at the suture, smooth ; whorls 5, slightly convex ; aper- 

 ture small, subcircular, peristome simple, thick. Length, 1*5 mill. 



* Mauritius. 



R. BADIA, Watson. PI. 67, fig. 81. 



Scarcely umbilicated, smooth, shining, translucent chestnut, with 

 fine growth lines, and a few microscopic spiral strise, most apparent 

 towards the top of the whorls and on the base ; whorls 4 J, slightly 

 convex, rapidly increasing, with narrow, distinct suture ; aperture 

 produced from the body whorl, with duplicate, continuous lip. 



Length, 1'5 mill. 



Port Jackson, Sydney, Australia. 



R. SCROBICULATOR, Watson. PI. 67, fig. 80. 



Pupiform, strong, shining, crimson- chestnut color, obliquely stri- 

 ate, with faint spiral striae, more distinct below the suture and near 

 the base ; whorls 4, flattened, suture linear ; aperture somewhat 

 detached and projecting, oblique, with duplicate continuous lip. 



Length, I'l mill. 



Port Jackson, Sydney, Australia. 

 R. OLIVACEA, Dunker. PL 66, fig. 43. 



Imperforate, subpupiform, thick, a little shining, fulvous, ob- 

 liquely longitudinally plicate, the plicae 25-26 in number, upper 

 part of spire smooth ; whorls 6, flatly convex, with slightly incised 

 suture ; peristome duplicate, continuous. Length, 2 mill. 



Sydney, Botany Bay, Australia. 



