ARNOLD -THE PALEONTOLOGY AND S llJATUiKAPUY OF SAN PEDRO. 265 



Shell thiik, elongated; spire elevated; apex acute; whorls ten, rounded, witii twelve to 

 sixteen heavy, refiexed varices; varices striated with line incremental lines; suture deejj; aperture 

 subcircular; inner lip thickened, forming columella. 



Dimensions. — Long. 26.5 mm.; lat. 9 mm.; tlell. 32 degrees. 



Distini;'iiislial)Ie from -S'. tinctn by heavier shell, thicker and ji;enerally more 

 luiiueruiis varices, \vlii(;li are refle.xcd, ami i)y a more solid appearance caused by the 

 loss sunken suture; distinguishable from S. hiiuhii by more whorls, thicker shell, 

 more varices, which arc thicker, more refiexed and less coronate, and by less promi- 

 nent sutures; distinguisiiable from S. crehricostdla by thicker shell, thicker varices, 

 which are more refiexed, and by a less prominent suture. Several specimens of 

 this species were identified by Dr. J)all. 



Two from the Pliocene of Deadniaii Island; common in the lower and upper 

 San Pedro series of San Pedro and vicinity. The specimen figured is from the 

 upper San Pedro series at San Pedro, and is now in the collection of Delos Arnold. 



Licinyr — Straits of Fuca to San Diego (Cooper). 



Pleistocene. — Santa Barbara (Cooper): San Diego (Dall): San Pedro (Arnold). 



Pliocene. — San Pedro (Arnold). 



278. Scala tincta Carpenter. 



Plate V, Fig. ."?. 



Sca/aria liiicla CpR., Brit. Assn. Kept., 1863, [). 660. CooPER, 7th Ann. Rept. Cal. St. Min., 1888, 



p. 263. 

 Sea/aria indianoriim var. tincta Cl'R., Ann. & Mag. Nat. Hist., 3rd Ser., Vol. XV, 1865, p. 31. 



Trvon, Man. Conch., Vol. IX, p. 70, Pi. XIV, fig. 49, 1887. 



Shell thin, elongate; spire elevated; apex acute; whorls nine to ten, rounded, with ten to 

 twelve tliin varices, which are generally not refiexed; suture deep; aperture subcircular; inner lip 

 only slightly thickened. 



Dimensions. — Long 25 mm.; lat. 10 mm.; defl. 28 degrees. 



Distinguishable from H. indinnornin by more delicate shell, thinner varices, 

 which arc not refiexed as a ride, thinner lip and nuudi deeper sului'e; distinguishable 

 from N. hliiih'd by more numerous varices, which lack the distinct coronation, and by 

 more whorls and less deflection; distinguishable from S. crehricoalata by fewer and 

 less refiexed varices. Specimen.s identilied by Dr. Dall. 



Rather common in upper, and rare in lower San Pedro series of San Pedro 

 and vicinity. Found in the Pleistocene at Barlow's ranch, Ventura; at Pacific 

 Beach and Twenty-sixth Street, San Diego; and in the Pliocene at Pacific Beach 

 and Iluss School, San Diego. The specimen figured is from the upper San Pedro 

 series at San Pedro, and is now in the collection of Delos Arnold. 



Living. — Santa Cruz to San Diego (Cooper). 



, 34 ) JUrch 27, 1903. 



