PECTUNCULUS.— Plate V. 



libus fortioribus ; albidd, postice et mediane maculis 

 castaneis irregulariter nebulosd, antice Kneis longitu- 

 dinalibus castaneis vivide pictd ; umbonibus centra- 

 libus. 



The lineated Pectunculus. Shell orbicular, convex, 

 slightly auriculated, decussately striated, longitu- 

 dinal striae the stronger ; whitish, clouded poste- 

 riorly and about the middle with chestnut spots, 

 and vividly painted anteriorly with dark longitudi- 

 nal lines ; umbones central. 



Reeve, Pro. Zool. Soc, 1843. 



Hab. West Indies. 



The painting of this species is not much unlike that of 

 the preceding ; the anterior side of the shell, however, 

 is white and very peculiarly lineated. 



Species 26. (Mus. Cuming.) 



Pectunculus multicostatus. Pect. testd orbiculari, 

 diatim costatd, costis nutnerosissimis rotundatii 

 distinctis ; albd, castaneo, rubiginoso, cinereoque 

 riegatd ; umbonibus antice infiexis. 



The many-ribbed Pectunculus. Shell orbicular, 

 diately ribbed, ribs very numerous, rounded and 

 stinct ; white, variegated with chestnut, rust, ; 

 ash colours ; umbones bent in anteriorly. 



Sowerby, Pro. Zool. Soc, 1832. 



Hab. Bay of Guayaquil (found in coarse sand and gn 

 at the depth of twelve fathoms) ; Cuming. 



This very beautiful Pectunculus has somewhat 

 appearance of a Cardium. 



