38 ZOOLOGY OF THE VOYAGE OF THE SULPHUR. 



Inhab. Pueblo Nueva, west coast of Veragua ; in twenty-six fathoms, living 

 gregariously in the mud. 



The law of repetition of affinity under similar circumstances, meets with 

 copious illustration in tropical American shells, when compared with those of cor- 

 responding situations in the Asiatic seas ; and in some cases the species are not 

 easily defined. Thus, Solarium granulatum of Asia is represented by <S'. quadriceps ; 

 many further instances may be found in Pleurotoma, Nucula, Cardium, Nalica, 

 &c, and in the present case we have the representative of Phos senticosus. 



159. Phos articulatus, (Plate X. fig. 7, 8.) Testa elongate ovata, albida, fusco nebulosa, 

 anfractibus rotundatis, costatis, lineis impressis transversis, infra, suturam planulatis et angulatis, 

 albo fusco articulato anguste fasciatis ; costis circa quatuordecem ad peripheriam, interdum 

 varicosis; columella nuda. 



Inhab. Panama. 



The narrow banded articulated markings render this very distinct, and at 

 the same time confer on it considerable beauty. 



160. Phos roseatus, (Plate X, fig. 9, 10.) TestS. ovata, acuminata, turrita, cancellata, interdum 

 varicosa ; anfractibus rotundatis, sparsim fusco nebulosis ; labro pone costis aggregatis, sinu magno : 

 apertura subquadratai, rosea., superne callosa sed edenticulatS,. 



Inhab. North coast of Sumatra. 



This Phos has the varices of a Triton, with its proper mouth and external 

 cancellation. The former is of a delicate rose pink. 



161. Phos gaudens, (Plate X, fig. 5, 6.) Testa elongate ovata, acuminata, nitida, pallida, 

 prope suturam atro-fusco fasciata ; anfractibus rotundatis, costatis, costis circa, novem ad peripheriam, 

 albide nodulosis, interstitiis subtiliter striatis, ultimo fasciato; apertura elongate ovali. 



Inhab. Gulf of Tehuantepec, west coast of Mexico. Dredged from thirteen 

 fathoms. 



Columbella. Lamar ck. 



162. Columbella fusiformis, (Plate X, fig. 17,18.) Testa, fusiformi, utrinque attenuata, 

 laevigata, pallida, strigis rufis longitrorsum nubeculata; anfractibus subrotundatis, nudis, ad 

 extremum spirae costatis, ultimo dorso tuberculo unico; labro incrassato, planulato, intus laevi; 

 apertura elongata, albida; labio interno subproducto ; epidermide tenui induta. 



Inhab. Veragua, west coast of America. In twenty-four fathoms, among 

 sand. 



The associate of C. lanceolata and C. recurva, from which it is distinguished 

 by its smooth whorls, naked of tubercles or ribs, if we except the very extreme 



