FAUNA OP OETHAULAX PUGNAX ZONE. 75 



Genus CHICOREUS Montfort. 



Chicoreus Montfort, Conch. Syst., vol. 1, 1810, p. 611. Type, Murex ramosua 

 Linnaeus. 



CHICOREUS LARVAECOSTA Heilprin. 



Murex larvaecosta Heilprin, Trans. Wagner Inst., vol. 1, p. lOG, pi. 15, 

 fig. 37, 1887.— D ALL, Trans. Wagner Inst., vol. 3, pt. 1, p. 140, 1890. 



Tampa silex beds at Ballast Point Tampa Bay, Florida; rare; 

 Heilprin and Post. U. S. Nat. Mus. No. 165087. 



CHICOREUS CRISPANGULA Heilprin. 

 Plate 5, fig. 14. 



Mtirex crispangula Heilprin, Trans. Wagner Inst., vol. 1, p. 107, pi. 15, fig. 



38, 1887. 

 Murex (Chicoreus) crispangula Dall, Trans. Wagner Inst, vol. 3, pt. 1, 



p. 140, 1890. 



Tampa silex beds at Ballast Point, Tampa Bay, Florida; two 

 specimens, Heilprin and Post. U. S. Nat. Mus. No. 214442. 



This is related to M. larvaecosta, having the same number of 

 varices, but is less prominent and angular at the shoulder. 



CHICOREUS BURNSII Whitfield. 



Murex shilohensis var. burnsii (Whitfield Ms.) Dall, Trans. Wagner Inst., 

 vol. 3, pt. 1, p. 141, 1890. — Whitfield, Miocene Gastr. N. J., p. 98, pi. 17, 

 fig. 2, 1894. 



Oligocene of the Tertiary marls at Shiloh, New Jersey, Wliitfield ; 

 Tampa silex beds at Ballast Point, Tampa Bay, Florida. U. S. Nat. 

 Mus. No. 112065. 



Genus PURPURA Martyn. 



Purpura Martyn, Univ. Conch., vol. 2, table, pi. 66, fig. 1, 1784. Sole exam- 

 ple, P'Urpura foliata Martyn. 



Cerostoma Conrad, 1837, not of Latreille, 1802. 



Pterorhytis Conrad, Proc. Acad. Nat. Sci. Philadelphia for 1862, p. 560. 

 Type, Murex umbrifer Conrad, Tert. Fos., 1832, p. 17, pi. 3, fig. 1. — 

 Dall, Trans. Wagner Inst., vol. 3, pt. 1, p. 143, 1890. 



Not Purpura Lamarck, Prodrome, p. 71, 1799 (P. persica Linnaeus). 



Purpura Dall, Proc. Biol. Soc. Wash., vol. 18, p. 189, 1905; Proc. U. S. N. 

 Mus., vol. 29, p. 427, 1905 ; U. S. Geol. Survey, Prof. Paper 59, p. 45, 1909. 



I have fully demonstrated in the publications above referred to 

 the necessity of returning to the usage of the ancients who applied 

 the name Purpura especially to certain purpuriferous muricoid shells, 

 a practice Lamarck was the first to violate. 



