1914] English: The Fernando Group near Newhall, California 215 



CHIONE FERNANDOENSIS, n. sp. 

 Plate 23, figures 9a and 9b 



Shell small, sub-triangular, thick ; lunule large, cordate, distinct, 

 bounded by an impressed line; anterior dorsal slope short; posterior 

 dorsal slope long and only very slightly convex ; escutcheon broad and 

 Hat or slightly concave; ligamental channel equal in length to one-third 

 of posterior dorsal slope ; base roundly arcuate ; shell characterized by 

 concentric lamellae which become more prominent upon erosion of 

 specimens and give a corrugated appearance ; radially sculptured by 

 numerous fine ribs. 



This species is common in the lower part of the Fernando for- 

 mation. It was probably identified as Chione suecincta by Gabb, who 

 lists the latter from the Pliocene near San Fernando. It differs from 

 Chione suecincta by its larger lunule and much finer radial ribbing, 

 otherwise the two are very similar. 



Altitude, 18 mm.; length. 22 mm.; diameter, 10.5 mm.; lunule 

 length, 6 mm., width, 4 mm. 



From lower Fernando, Elsmere Canon, Pico Canon. Holser Caiion, 

 Simi Valley (Univ. Calif. Coll.). 



GYRINEUM ELSMERENSE, n. sp. 

 Plate 23, figure 6 



, Shell bucciniform; spire high, apex broken, two whorls present; 

 suture deeply impressed, whorls rounding out below suture ; varices 

 prominent ; two or three low, rounded ridges on body whorl between 

 each two successive varices ; shell cancellated, body whorl marked by 

 about twenty flat spiral lines equal in width to the interspaces, these 

 crossed by numerous fine longitudinal ribs; mouth opening oval, equal 

 in height to half the estimated height of shell if complete; outer lip 

 greatly thickened, spiral lines form small teeth on the inner surface 

 of the lip ; inner lip thinly encrusted, spiral lines show through the 

 callus ; canal apparently small, narrow. 



This species appears to be close to G. mathewsoni Gabb. It differs 

 from Gabb's figure in smaller size, somewhat more deeply impressed 

 suture, and presence of the ridges between varices on the body whorl. 



Altitude, 26 mm.; width, 20 mm.; thickness, 14 mm.; mouth open- 

 ing height, 15 mm., width, 8 mm. 



From lower Fernando, Elsmere Canon. Univ. Calif. Loc. 1601. 



