PSAMMOBIA.— Plate IV, 



promiscuously blotcbed and obscurely rayed with 

 purple-cbestnut and reddish-violet, obliquely striately 

 wrinkled, wrinkles posteriorly irregularly wave-pli- 

 cated, anterior side rounded, posterior truncately 

 rounded, convexly impressed from the umbo. 

 Deshayes, Pro. Zool. Soc. 1854, p. 323. 

 Hah. Island of Ticao, Philippines ; Cuming. 



The most obvious characteristic of this species is its 

 peculiarity of painting, the surface being more or less 

 ornamented with promiscuous blotches of purple-chestnut 

 and reddish-violet inclining towards the margins in rays. 



Species 27. (Mus. Cuming.) 



PsASiMOBiA MARMOUEA. Psum. testd ovato-transvend, 



compresmisculd, soliduld, subwquilateraU, obligue stri- 



ato-rugosd, ritgis postice Jlexitoso-plicatis, lufescente- 



albd, ad itmbones hdescmite-violaced, pitrpureo-cas- 



taneo internipte radiatd, latere antico rotundato, pos- 

 tico compresse truncato, ab umbcme obtuse mperfieia- 

 liter angulato. 

 The marbled Psammobia. Shell ovately transverse, 

 rather compressed, rather solid, nearly equilateral, 

 transversely obliquely striately wrinkled, wrinkles 

 flexuously plicated, yellowish-white, yellowish-violet 

 at the umboes, interruptedly rayed with purple- 

 chestnut, anterior side rounded, posterior compressly 

 truncated, obtusely superficially angled from the 

 umbo. 

 Deshayes, Pro. Zool. Soc. 1854, p. 824. 

 Hab. Moluccas and New Holland. 



The painting of this species resembles that of the last 

 in colour, but it is differently disposed, whilst the sculp- 

 tured wrinkles are more obliquely pronounced, though 

 nearly obsolete in the middle. 



