IOR PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 37. 
more or less produced in thread-like filaments; aperture large, lirate 
on the body callus and denticulate on the varicose outer lip, the 
denticles more or less painted with black streaks and associated in 
separate pairs. 
This species is rare and without economic importance. 
CYPRHA ANNETT£Z Dall. 
Cyprea annette Dau, Nautilus, April, 1909, p. 125. 
Cyprea sowerbyi KieNER, Icon., Cyprxa, 1845, p. 38, pl.7, fig.3. Not C. sowerbyt 
of Gray, 1832; or ANTON, 1839. 
Beach of Sechura Bay, near Matacaballa, one badly worn specimen. 
Distribution.—Gulf of California and southward to Paita and 
Sechura Bay, Peru. 
This species has no economic relations. 
CERITHIUM STERCUSMUSCARUM Valenciennes. 
Cerithium stercusmuscarum VALENCIENNES, Humboldt Voy., vol. 2, 1833, p. 278.— 
SowersBy, Thes. Conch., 1855 (as C. ocellatum), p. 865, pl. 179, figs. 59, 73. 
From the shell bank at Matapalo near Capon. Occurs in great abundance on shelly 
ground, but is of no economic importance. 
Distribution.—From Cedros Island, Lower California, and the 
Gulf of California, southward to Panama, Tumbes, and the Galapagos 
Islands. 
TURRITELLA GONIOSTOMA Valenciennes. 
Turritella goniostoma VALENCIENNES, Humboldt Voy., vol. 2, 1833, p. 275.— 
Reeve, Conch. Icon., Turritella, 1849, fig. 10, a-b. 
Island of Lobos de Tierra, one young shell. 
Distribution.—Gulf of California and southward to Paita, Peru, 
and the Lobos Islands. 
Shell slender, elongated, with many flat-sided, spirally threaded, 
purple and brownish whorls. Aperture subcircular. Length of a 
full-grown specimen about 75 mm. 
This shell, though common, has no economic importance. 
LITTORINA PERUVIANA Lamarck. 
Plate 23, fig. 7. 
Phasianella peruviana Lamarck, Anim. s. Vert., vol. 7, 1822, p. 53.—Woop, 
Index Test. suppl., 1828, pl. 6, fig. 33 (as Turbo zebra). 
From rocks on the shores of Callao Bay and San Lorenzo Island. Also on the 
Chincha Islands in similar places, and along shore at Mollendo. Here some of these 
snails were taken far above the water line. 
Distribution.—From Panama and the Galapagos Islands south to 
Valparaiso. 
Shell small, conical, turbinate, with a corneous operculum of few 
whorls; the color black with large oblique blotches or streaks of 
