252 OVULA. 



angulated above the middle, lip conspicuously dentate, columella 

 dentate above. Length, 13 mill. 



Borneo, Viti Isles. 



The aperture is wider below, the angle of the back more pos- 

 terior than in the preceding species, of which it may nevertheless 

 be only a variety. It is 0. hordacea of Sowerby and Reeve, not 

 Lamarck. 



Subgenus VOLVA, Bolten, 1198. 



O. VOLVA, Linn. PI. 4, figs. 94, 95. 



Pinkish or brownish flesh-color, back transversely incisely 

 striated, extremities with raised striae, lip thickly margined, 

 nearly smooth, interior flesh-colored or brownish. 



Length, 3-5 inches. 



China, Philippines, Japan. 



0. LONGIROSTRA, Sowb. PI. 4, figs. 92, 93. 



Yellowish white, moderately gibbously angled in the middle, 

 lip callously reflected. Length, l'75-2'5 inches. 



Isl. of Bourbon. 

 O. RECURVA, Adams and Reeve. PI. 4, figs. 96, 97. 



White, transversely minutely striated, gibbously angled in 

 the middle, lip callously margined. Length, 22 mill. 



China, Japan. 

 Possibly a minor variety of 0. longirostra. 



0. GRACILIS, Ads. and Reeve. PI. 4, figs. 98, 99. 



Pale fulvous, maculated with red next the margin of the 

 thickened lip. Length, 11 mill. 



East Coast of Borneo. 



0. PHILIPPINARUM, Sowb. PI. 4, figs. 100-9. 



Livid flesh-color, rather thin, thickened margin of lip yellowish 

 white. Length, *75-l'25 inches. 



Philippines, Japan, Australia. 



With this species I unite as synonj-ms 0. Carpenteri, D linker 

 (fig. 2) ; 0. Angasi, A. Ad. (figs. 3, 4), and 0. depressa, Sowb. 

 (fig. 5), with its variety rosea, Rositer, from Australia ; 0. sub- 

 reflexa, Ad. and Reeve (figs. 6, 7) ; 0. deflexa, Sowb. (fig. 8), and 

 the Japanese 0. Adamsii, Dunkcr (fig. 9), which differs in no 

 appreciable degree from Angasi. 



