850 



While this species is generally lineated, but sometimes occurs 

 white or spotted, it is more usual with the preceding to be while; 

 but the true difference, if sufficiently marked to be specific, is the 

 great width between the asperated ribs and the distance of the 

 points upon them. The species is from the Pacific Ocean. 



7. Cekithium aluco (pi. clxxvii. f. 34, 35), Linnaeus, Syst. 

 Nat. ed. 12. p. 1225 (Murex). Murex coronatus, Born. 



Cerith. testa kevi, pallida, nigro et fusco maculata ; anfractibus 

 ventricosis, superioribus cancellatis, medianis angulo superiore 

 distanter angulatim et acute noduliferis, ultimo univaricoso ; aper- 

 tura, alba, bicanalifera ; labio intcrno integro postice uniplicato, 

 antice ad canalem angulifero ; labio externo rotundato, super ca- 

 nalem in angulum producto ; canali elongato subabrupte recurvo. 



The whorls are crowned with large, distant, acute tubercles. 

 The whole shell, excepting the apical whorls, is smooth and 

 spotted with irregular specks and blotches of black. The aper- 

 ture is more inflated than either of the clavate species. The dark 

 specimen figured is from the Philippines. The light small speci- 

 men is from the collection of the late Mr. G. B. Sowerby. Lo- 

 cality unknown. 



8. Cerithium Sowerbii (pi. clxxvii. f. 33), Kiener, Sp. de 

 Coq. pi. 7. f. 2. C. clava, Sowerby' $ Genera. 



Cerith. testa solida, pallida, laevigata, pyramidali, fusco nebu- 

 lata et punctis maculisque tessellata ; anfractibus superioribus 

 subcrenulatis et carinatis, medianis ad latcra compressis; sutura 

 vix distincta ; apertura subquadrata, postice canalifero ; labio in- 

 terno purpurascente, postice uniplicato, antice laminatim incras- 

 sato; labio externo rotundatim incurvo, kevi; canali attenuato, 

 abrupte incurvo. 



Differing from C. aluco in its more pyramidal form, the straight- 

 ening of the whorls, the comparative squareness of the aperture, 

 and the greater solidity of the whole shell. The late Mr. G. B. 

 Sowerby thought that he recognized in this shell the C. clava of 

 Bruguiere. 



9. Cerithium Cumingii (pi. dxxvi. f. 19), A. Adams (Ver- 

 tagus). 



Cerith. testa la;vigata, nigro et fusco longitudinaliter disruptim 

 fasciata ; anfractibus superioribus subangulatis cancellatis, media- 

 nis vix angulatis, ultimo ovali ; apertura bicanaliculata ; canali 



recurvo, 



