ARCA, Panama Sheik. 257 



412. Pectunculus maculatiis ? 



Syno7iymy. 



Pectttnculus maculatus Brocl. in Proc. Zool. Soc. Lond. p. 126. June 1832. 

 Reeve Conch. Icon. pi. 1. f. 4. Feb. 1843. 



Station. — In fine gravel in 11 fathoms water; Cuming I 

 Broderip. 



HabitaL — Puerto Portrero ; Cuming 1 Broderip : also Reeve. ■ 

 Panama; C. B. A. 1 



We obtained only one specimen. It is nearly covered with 

 very large irregular spots and radiating lines of dark red ; it is 

 also very convex at the umbones, and in both of these charac- 

 ters appears to differ from the P, maculatus as described by Mr. 

 Broderip, and as figured by Mr. Reeve. 



413. Area alternata. 



Synonymy. 



Byssoarca alternata Sowb. in Proc. Zool. Soc. Lond. p. 17. Feb. 1833. 



Miill. Syn. Test. Viv.p. 184. 1836. 



Area Reeve Conch. Icon. pi. 13. f. 88. Apr. 1843. 



Hanley Descr. Catal. p. 156. 1845 ? 



Orb. Voy. Amer. Merid. Moll. p. 638. 1846. 



Station. — Attached to stones, on a rocky bottom, at the 

 depth of 12 fathoms ; Cuming 1 Sowerby : also Reeve. 



HaMtat. — West Columbia ; Cuming ! Sowerby : also Reeve. 



Equador; Cuming 1 Orbigny. 



West Columbia ; Hanley. 



Mazatlan ; E. Jewett I Gould MSS. 



Panama and Taboga ; C. B. A. I 

 4 specimens were collected. 



414. Area aviculoidcsl 



Synonymy. „ 

 Area auriculata Sowb. in Proc. Zool. Soc Lond. p. 20. Feb. 1833. 



JULY, 1852. 66 *»»• I-™- N". Hist. 



