1922] Packard: New Species from Santa Ana Mountains 417 



CUCULLAEA (?) COBDIFOKMIS, n. sp. 

 Plate 24, figure 1 



Type specimen 12311, Coll. Invert. Palae., Univ. Calif., loe. 2158. 



Shell large, trigonal in outline, equivalve, nearly equilateral, height greater 

 than length; widely separated, with narrow acute, incurving beaks. Anterior 

 extremity broken, probably rounded, resembling the broadly rounded posterior 

 end; base arcuate. Umbones very prominent. Dorsal area broad. The chevrons 

 marked by widely separated diverging lines. Hinge line relatively short. Length, 

 64 mm.; height, 75 mm.; diameter, 70 mm. 



The only other specimen (no. 12312) comparable to the type was 

 obtained in beds stratigraphically lower at locality 2149. That form 

 was much smaller and differed from the type in having adjacent 

 beaks. This new species differs markedly from other known West 

 Coast members of this family in the ventricose character of the 

 umbones. 



Horizon. — Chieo group, Turritella pescaderoensis zone. 



CUCULLAEA LIEATA, n. sp. 

 Plate 24, figure 2; plate 25, figure 3 



Type specimen 12314, Coll. Invert. Palae., Univ. Calif., loc. 2149. 



Shell large, elongate, inequilateral. Anterior extremity short, evenly rounded; 

 posterior extremity pointed (?), accentuated by a prominent umbonal ridge; 

 ventral margin straight. Umbones small, widely separated by a dorsal area. 

 Posterior dorsal area flat. Shell sculptured by numerous radial striae and promi- 

 nent concentric growth lines. Hinge line short, with dentition typical of the 

 genus. Height, 53 mm.; length, 75 mm.; convexity, 28 mm. 



• Several specimens of this species have been found at three collect- 

 ing localities. The species quite closely parallels both in form and 

 sculpture Trigonarca telugensis Stoliczka from the Trichinopolophy 

 group of India. The lack of spinose ribs will distinguish it from the 

 Indian species even if the hinge is not visible. 



Horizon. — Chico group, Actaeonella oviformis and Turritella pes- 

 caderoensis zones. 



CUCULLAEA (?), sp. 



A single specimen of a small form which may possibly represent C. broiver- 

 siana Cooper was obtained from University of California locality 2142. 



Shell equilateral, nearly circular in outline. Umbones low, nearly meeting 

 above the dorsal area. Anterior and posterior ends evenly rounded. Hinge 

 line long. Length, 36 mm.; height, 30 mm.; diameter, 26 mm. 



Horizon. — Chico group, Actaeonella oviformis zone. 



