202 CALIFOUNIA AC.'ADKMV OF SCIKNCES. 



Pleistocene. — Santa Barbara; San Poilro; Vculma (AriinM). 

 Pliocene. — Santa Rosa; Kirker's Pass; San Fernando (Cooper): Stanford 

 University (Arnold). 



Subfamily CORALLKlPUlLlN.E. 



Genus Coralliophila //. <l A. Adam.9. 



Shell broadly fusiform; nuckar whorls smooth; postnuclear whorls with rasp-like surface, 

 and somewhat open umbilicus. 



Coralliophila neritoidea is a characteristic sjiccies. 



272. Coralliophila nux Reeve. 



Murex nux RvE., Conch. Icon., sp. 81. 



Coralliophila 7tux RvE., Tryon, Man. Conch., Vol. II, p. 210, PI. LXVI, figs. 368, 374, 1880. 



Shell purpuroid shaped; whorls angular; surface rough and cancellated by spiral and trans- 

 verse squamose ridges, the spiral ridges being the most prominent; suture deep. Longitude about 

 12 millimeters. 



Tliis specimen is too imperfect to allow of a good description. Dr. Dall 

 labeled this specimen ''Coralliophila, probably var. of nux." 



One si^ecimen from the upper San Pedro series of San Pedro. 



Living. — Mazatlan to Panama; Gallajiagos Islands (Tryon). 



Pleistocene. — San Pedro (Arnold). 



Suborder ST RE PTODON T A. 



Superfamily PTENOGLOSSA. 

 Family LXll. SCALID.E. 



Genus Scala Iluniphrey. 



Shell mostly pure white and lustrous; turreted, many whorled; whorls round, sometimes 

 separated, ornamented with numerous transverse ribs; aperture round; peristome continuous. 



Scala pretiosa Linn, is a characteristic species. 



