64 BULLETIN DO, UNITED STATES NATIONAL MUSEUM. 



Family FASCIOLAKIIDAE. 



Genus FASCIOLARIA Lamarck. 



Colus (sp.) BoLTEN, Mus. Bolteuiaiium, p. 117, 1798. First species, Murex 



tulipa Gmeliu. 

 Fasciolaria Lamarck, Prodrome, p. 73, 1799. Sole example, Murex tulipa 



Linnaeus. 



FASCIOLARIA PETROSA, new species. 

 Plate 6, fig. 7. 



Shell of moderate size and about 7 whorls exclusive of the (lost) 

 nucleus; whorls with a somewhat turrited appearance, due to the 

 flattish slope to a prominent shoulder emphasized by the strong ribs ; 

 suture closely appressed; spiral sculpture of rounded threads with 

 equal or wider interspaces, the threads alternating in size, the larger 

 ones becoming more prominent and slightly nodulous on the base 

 and canal ; axial sculpture of 7 to 9 strong rounded ribs, with wider 

 interspaces and obsolete above the shoulder and on the base; aper- 

 ture subovate; the outer lip sharp and crenulate, the throat with 

 about 24 entering lirae; a shallow subsutural channel with a rather 

 thick callus on the body and pillar ; the edge of the pillar is promi- 

 nent with three well-defined plaits behind it diminishing in size back- 

 ward, with a faint indication of a fourth; siphonal fasciole strong, 

 with a deep chink between it and the callus of the pillar ; canal nar- 

 row. Height of type-specimen 100, last whorl 70 (the canal and apex 

 slightly defective) , maximum diameter 47 mm. 



Tampa silex beds at Ballast Point, Tampa Bay, Florida; one speci- 

 men; E. J. Post, U. S. Nat. Mus. No. 165073. 



This is a well marked species of the general aspect of the group to 

 which F, gigantea Kiener belongs. 



Genus LATIRUS Montfort. 



Latirus Montfort, Conch. Syst., vol. 2, p. 531, 1810. Sole example, Murex 



polygonus Gmelin. 

 Lathyrus Latreille, Fam. Nat., p. 187, 1825. 

 TurUnella (sp.) Lamarck et auct. aliis. 



LATIRUS FLORIDANUS Heilprin. 



Plate 8, Fig. 6. 



Latirus floridanus Heilprin, Trans, Wagner Inst., vol. 1„ p. 108, pi. 15, fig. 



47, 1887.— Dall, Trans. Wagner Inst, vol. 3, pt. 1, p. 106, pi. 8, fig. 2, 



1890. 



Oligocene of the " nummulitic bed" near Martin Station, east- 



Avard from Tampa, and of the Tampa silex beds at Ballast Point, 



