ARNOLD — THE PALEONTOLOGY AND STRATIGRAPHY OF SAN PEDRO. 341 



Genus Puncturella Loive. 



Shell conical, elevated, with the apex recurved; perforation in front of the apex, with a 

 raised border (septum) internally; surface cancellated. 



Puncturella noachina Linn, is a characteristic species. 



401. Puncturella cucullata Gould. 



Rimula cucullata Gld., Proc. Bost. Soc. Nat. Hist., Vol. II, 1846, p. 159; Wilkes' Expl. Exped., 



Vol. XII, p. 268, fig. 475, 1852. 

 Puncturella cucullata Gld., Cpr. , Brit. Assn. Rept., 1863, p. 651. Cooper, 7th Ann. Rept. Cal. 



St. Min., 1888, p. 261. Tryon, Man. Conch., Vol. XII, p. 232, PI. XLII, figs. 72-75; 



PI. LXIII, figs. 38, 39, 1890. 



Shell shaped like an oblique cone, with an elevated acute apex posterior to the center and 

 curving forward like a curved beak; sixteen to eighteen prominent radiating ribs with three to five 

 less prominent ribs between each of the larger; ribs muricated by fine incremental lines; fissure 

 narrow and narrowing upwards; aperture ovate; inner edge crenulated, furrows following the external 

 ridges only for short distance from ribs. 



Dimensions. — Long. 22 mm.; lat. 15.5 mm.; alt. 13.5 mm. 



The specimen described was identified by Dr. Dall. 



Rare in lower San Pedro series of San Pedro; four specimens; also found in 

 Pliocene of Deadraan Island; and upper San Pedro series at San Pedro. Found in 

 the Pliocene at Packard's Hill, Santa Barbara. 



Living. — Straits of Fuca to Monterey (Cooper). 



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



Pliocene. — Packard's Hill, Santa Barbara (Arnold). 



402. Puncturella galeata Gould. 



Rimula galeata Old., Proc. Bost. U. S. Nat. Hist., Vol. II, 1846, p. 159; Wilkes' Expl. Exped., 



Vol. XII, p. 369, fig. 476, 1852. 

 Puncturella galeata Gld., Cpr., Brit. Assn. Rept., 1863, p. 651. Tryon, Man. Conch., Vol. XII, 



p. 230, PL XLII, figs. 62-65, 1890. 



Shell erect, conical; apex central, elevated, acute, with the point hooked forward; numerous, 

 nearly equal, sharp raised lines radiate from the apex; incremental lines fine and numerous; fissure 

 narrow and small; in front of sulcus, near the summit, is a transverse rib having between it and the 

 formix on each side a little triangular pit. 



Dimeyisions. — Long. 8.1 mm.; lat. 5.5 mm.; alt. 6 mm. 



The sjjecimen described was identified by Dr. Dall. 



One specimen in lower San Pedro series of San Pedro; also found in 

 Pliocene of Deadraan Island. 



Living. — Puget Sound district (Carpenter). 



Pleistocene. — San Pedro (Arnold). 



