1904.] NATURAL SCIENCES OF PHILADELPHIA. 17 



Ocinebra monoptera n. sp. PI. IV, figs. 32, 32a. 



Shell small, solid lusterless, ashy-gray. Sculpture of numerous 

 small longitudinal folds, about 12 on the penultimate whorl, becoming 

 obsolete below the periphery on the last whorl, crossed by numerous 

 unequal, scaly spiral cords, about 20 on the last whorl. Whorls 

 6, the first rounded, forming a smooth mammillar protoconch, the 

 rest angular in the middle, the last angular peripherally, flat and 

 sloping above, convex below the angle, contracted downwards; ex- 

 panding behind the lip in a very broad wing-like varix, triangular in 

 section. Aperture oval, the outer lip built forward in a thin rim, and 

 with two low fold-like teeth within. Anterior canal closed, tubular. 



Length 12.5, diam. 7.2 mm. 



Hirado, Hizen. Types No. 86,121, A. N. S. P., from No. 1,522 of 

 Mr. Hirase's collection. 



This peculiar little species resembles the larger 0. nassoides Reeve, 5 

 but the wing is wide below, not notched there, and the longitudinal 

 ribs are weaker. 0. japonica Dkr. is a much larger and multivaricose 

 shell, but seems to be related to this. Reeve's Triton nassoides has 

 been referred to Nassaria, but it has little resemblance to the type of 

 that genus. 



Purpura tosana n. sp. PI. Ill, fig. 30. 



Shell small, imperforate, fusiform, solid, gray-white with an inter- 

 rupted black-brown band below the suture, another below the periphery 

 and a less distinct one at the base. Sculpture of numerous longitudinal 

 rounded folds or waves, many of them followed by a raised line marking 

 a former peristome. These folds are more distinct on the spire than 

 on the last whorl, where there are 10 to 15 of them. The folds are 

 crossed by numerous strong, rounded spiral cords, which are often 

 weakly striate in the same direction, are wider than their deep intervals, 

 and pass equally over folds and valleys. There are about 10 of these 

 spiral cords on the last whorl, besides some small ones below the suture 

 and in the intervals of the large cords on the basal slope. The inter- 

 stices in well-preserved shells are delicately, closely lamellose. The 

 spire is rather slender and acute. There are about 7 whorls in perfect 

 shells, the first two forming a smooth, bulbous, shortly cylindric 

 nucleus. Subsequent whorls are somewhat concave below the suture, 

 then convex. The last whorl is inflated peripherally, contracted 

 below, with a plicate basal fasciole. The aperture is slightly more 

 than half the length of the shell, dark purplish-brown with light bands 



5 Conch. Icon., II, Triton, PI. 20, fig. 96. 

 2 



