LATIAXIS. 203 



darker brown. Internally white or orange-colored, tlie lip sul- 



cated. Lengtli, 5-*^ inches. 



(!hui<(, Japan, Philippines. 



The typical form is ribbed, with foliated growth-lines; a 



smoother form, simply striate, has been described as a distinct 



species, but may be designated as 



Var. Thomasiana, Crosse. 



Furpm-a marginata (fig. 337), and P. venosa (figs. 839, 340), of 

 Valenciennes, are equivalent, and enough intermediate varieties 

 are before me to establish its identity with the type form. It is 

 sold as food in the markets of Yokohama. 



R. BULBOSA, Sol. PI. 03, fig. 336. 



Shell bulbous, shoulder convex ; onlj^ slightly defined by a 



a revolving series of vaulted scales or tubercles ; suture excavated ; 



spire depressed. Yellowish-brown, clouded ; white or orange 



within. Length, 2*5-4 inches. 



fJIdna, Japan, Philippines. 



More inflated, thinner, smoother than the typical P. bezoar ; of 

 which it is, perhaps, only a variety. 



It is the Murex rapa of Clmelin, but not of Linnteus, the latter 

 being the same as Pyrula payyracea of Lamarck, belonging to 

 the genus Rapa. 



Subgenus Latiaxis, Swainson. 



Whorls more or less detached, carinated ; aperture small, 

 trigonal ; canal narrow, rather long, curved. The animal and 

 operculum are unknown. 



R. Maw^, Gray. PI. 64, figs. 344-346 ; PI. 66, fig. 383. 



White, yellowish or flesh-color ; usually flesh-tinted within. 



Length. 2 inches. 



China, Philippines. 



With this species I unite R. Deiesi^erti (fig. 346) and R. pur- 

 purata (fig. 345) of Chenu, as well as R. De Burghise of Reeve 

 (fig. 383). 



R. IDOLEA, Jonas. PI. 64, figs. 342, 343. 



Light brown; covei-ed with close revolving ribs; sometimes 

 longitudinall}' plicate ; periphery angulated or carinated. 



Length. 1-2 inches. 



China, Australia, Philippines, 



