54 NILS HJ. ODHNER, MOLLUSCA. 
under side and down the sides feebly rugated, dorsally smooth. The shape of the 
aperture as in 7’. oryza. The apical end of the shell somewhat produced. Spire not 
prominent nor visible. 
Locality: 42 miles W. S. W., 66 feet ("/7), 1 sp., 1. 8, br. 5.4, h. 4.6 mm; 45 
miles W. S. W., 66 feet ('°/7), 1 sp., 1. 7.5, br. 4.9, h. 4.3 mm. 
Even if the present form should prove to be identical with some species pre- 
viously known, I prefer to describe it as a new one before trying to identify it accord- 
ing the diagnoses and figures accessible at present, which, through their incomple- 
teness and through the accentuation of unessential characteristics without compar- 
isons with other forms, rather make a determination uncertain than increase our 
knowledge of the forms in question. 
Fig. 10. Radula of Trivia bipunctata n. sp. X 300. Fig. ll. Radula of 7. grando Gasx. X 300, 
Fig. 12. Radula of T. oryza Lam. X 300. 
The radula of 7’. bipunctata (fig. 10) differs from that of 7’. grando (fig. 11) 
and 7’. oryza (fig. 12) in being comparatively broader; its median tooth has an 
elongated central spine and 3 denticles on each side of it; and the first lateral has 
4 outer and | inner denticle. For comparison the radulae of the two other species, 
and even the specimens figured on plate 2, are reproduced here; they are narrower, 
have a smaller cusp of the central tooth and 4 denticles on its sides; the first lateral 
has 1 inner and in 7’. grando 4, in 7’. oryza about 8 outer denticles. 
FAM. MITRIDAE. 
Mitra variegata Runve. 45 miles W. S. W., 66 feet (°/:), 1 dead shell, h. 23 
mm. In form and colour most resembling WM. nympha Reeve (fig. 249, Conch. Icon. 
2, 1843), which is included by Tryon in the above species (Man. of Conch. IV, 1882, 
p. 113). — Distribution: Maldives, Mauritius (E. A. Smrri 1903); Queensland (HEDLEY 
1910); Philippines (TRyon 1882). 
