2:$Q MELVILL : NEW SPECIES OF PECTEN. 



nata, albd^ fludibus purpureo-brunneis hie illic conspersa, 

 intus purpuraesente, auricidis inceqiialibics, 

 Lofig. 25 /nilL, lat. 24 7nill. 



Hab. : Japonia. 



A conspicuous little globose shell, very beautifully con- 

 centrically striated in a wave-like fashion, the ribs being twice 

 furrowed, or bilirate. In form a slight superficial resemblance 

 to young specimens of the South American P. purpuratus may 

 be traced, but from that the whole sculpture abundantly differs, 

 I have much pleasure in associating with this species the name 

 of my friend, Hastings Dent, Esq., F.L.S., F.G.S., whose recent 

 travels round the world, including China and Japan, resulted in 

 some very interesting discoveries. 



Pecten hysginodes nov. sp. PI. ii, fig. 8, 

 P. testa subquadrato orbicularly Ixvi, subcequivalvl, valva sinistra 

 subco?ivexa, ambabus qulndeclm-costatls, costls loevlbus, ifiter- 

 stltlls copiose transllratis, rosea, ad laiera albescenie, brunneo- 

 sparsa, auricidis cequallbus, rectls, serrafis, dentatis, intus 

 rosea- alba. 

 Longit. 21 mill., lat. 23 mill. 



■Habitat ? 



This extremely beautiful shell is totally unlike any other 

 Pecten, and ranks amongst the most exquisite of a genus famed 

 for beauty of sculpture, form, and colour. Towards the sides 

 of the valves, the rosy-brown and white marbling alternate in 

 zigzag pattern. Upon the left valve, with the exception of one 

 crescent-like brown blotch, the colour is deep rose, suggesting 

 the trivial name. Towards the umbones the white predominates. 

 The right valve is similarly coloured, but paler, and it is much 

 more convex than its fellow. 



Pecten psarus nov. sp, PI. ii, fig. 9. 



P. testa ovata, cequilaterali, subcequivalvi, valvis novemdecim 

 costatis, costis eleganter serrulatis, plumbeo-alba, brunneo- 

 fluctiiata, auricidis subcequalibus. 



Long. 20 mill., lat. 18 mill. 



Hab. : Japonia. 



J.C., v., Jan., 1888. 



