MALLEUS 



Plate II. 



Species 4. (Mus. Cuming.) 

 M.4.LLEUS HEGULA. Mall, lestd elongatd, depressd, inter- 

 dum undato-didortd, props umioiies coneentrice lirato- 

 laminatd, laminis deinde irregularibus, plus minus de- 

 coriicatis, hasi postice stcbalatd ; purpureo-nigrd. 

 The rule Malleus. Shell elongated, depressed, some- 

 times wave-distorted, concentrically ridge-laminated 

 near the umboes, laminaj then irregular, more or less 

 decorticated, base slightly winged on the posterior 

 side; purple-black. 

 Ostrea regula, Forskael, Dcscr. Auim. p. 124. 

 Ostrea ocrea, Martini. 

 Fexillum Moluccanum, Chemnitz. 

 Ostrea Vulsella, Gmelin. 

 Malleus vulsellaius, Lamarck. 

 ITab. Philippine Islands. 



A puriile-black, strongly laminated species, mostly de- 

 corticated, so as to expose the laminse in broken concentric 

 ridges. 



Species 5. (Mus. Cuming.) 

 Malleus vulgaris. Mall, testa subelongatd, valde ru- 

 goso-contorid, basi angustissime lobatd, lobis subalatis, 

 prtxlongis; inius extusque purpureo-nigrd. 



The common Malleus. Shell somewhat elongated, 

 very roughly contorted, very narrowly lobed at the 

 base, lobes slightly webbed, very long; pm-ple-black 

 within and without. 

 Ostrea malleus, Linnseus, Syst. Nat. p. 1147. 



Malleus vulgaris, Lamarck. 

 JIab. China Seas. 



Distinguished from M. alius not only by its intense 

 purple-black colom'ing, but by its very rude, roughly blis- 

 tered, tumid, contorted growth. 



(Mus. Cuming.) y^ 

 Malleus d.emoniacus. Mall, testd rude lingueeformi, 



obliqud, coneentrice liraio-laminatd, ad basin utrinqne 



auritd ; intense purpureo-nigrd. 

 The demoniacal Malleus. Shell rudely tongue-shaped, 



oblique, concentrically ridge-laminated, eared at the 



base ; deep purple-black. 

 Eab. Philippine Islands. 



This shell might, perchance, be regarded as the young 

 of M. regula ; but it is of an oblique growth, conspicuously 

 eared on each side, the umboes and lignmentary cavity be- 

 ing exactly central. 



November, 185 8. 



