PECTUXCULUS. 325 



are uew^ and by far the greater portion figured for the first 

 time in the ' Couchologia Iconica/ 



A bright orange painting distinguishes the new and beau- 

 tiful Gold-flowing Pectunculus (P. aurijluus), brought from 

 the island of Capul, one of the Philippines^ and found in coral 

 sand upon the reefs. An adult specimen was singularly 

 higher in proportion^ when compared with a younger one, 

 and the groove running half-way up the ribs of the latter, 

 was quite obsolete in the former. Yalves of the Thin- 

 Eibbed Fectunculns (P. teuuicostatvs), from Australia, are 

 entirely covered with beautiful thread-like ribs, having the 

 interstices filled with fine roots of epidermis, arranged in 

 from three to four rows ; while the solid and globose shell 

 of the P. tessellatus, or Tessellated PeckmcidiiSj from West 

 Columbia, and found in sandy mud at the depth of ten 

 fathoms, is very neatly tessellated with rich purple-lake 

 spots. Eibs of the small Pectiinculiis perhisiis are finely 

 pricked, as the name implies, on each side, though bedded 

 in coarse sand at the depth of ten fathoms, off the Philippine 

 islands, Mindanao and Luzon, and little apparently in 

 accordance with such a coarse dwelling-place. A glossy 

 silken epidermis adorns the delicate P. sericatus, or Silk-clad 

 Pectimcidits, from Tortola; and dark ruddy spots, sparingly 



