No. 1704. A COLLECTION OF SHELLS FROM PERU—DALL. 179 
Bay, and Mollendo. These shells, like other limpets, are also called ‘‘sefioritas,” or 
ladies (probably from a fancied resemblance to one of the flounced petticoats favored 
by Spanish sefioras), and are used for food and bait. 
Distribution.—Whole Peruvian province from Valparaiso to Paita. 
Shell conical, with entire apex, solid, strong; rounded ovate, vari- 
able in height, the apex slightly in front of the middle of the shell; 
sculpture of low, rather wide radial ribs and obscure concentric and 
radial feeble striation; color whitish, with reticulated green markings, 
the interspaces of the ribs with larger greenish blotches; old shells 
may appear wholly gray outside and white inside, with a greenish 
inner border to the shell; young ones have a brownish or greenish 
blotch in the center. 
These shells sometimes exceed 2 inches in length. 
ACMAA ORBIGNYI Dall, new name. 
Acmezxa scutum OrBIGNy, Voy. Am. Mér., vol. 5, 1841, p. 479, pl. 64, figs. 8, 9. 
Not of Escuscuoitz, Zool. Atlas, vol. 5, 1833, p. 19, pl. 23, figs. 1, 2, 3. 
Lottia punctata Gray, 1835, according to OrBIGNy; not P. punctata LamarcK 
(Acmexa), 1822. 
Patela. On rocky shores of the northeast part of San Lorenzo Island, Callao Bay. 
Confused by the fishermen with the other species. 
Distribution.—Whole Peruvian province from Chonos archipelago 
to Callao, Peru, and the Galapagos Islantls. All these limpets seem 
to be called Patelas or Senoritas by the fishermen. 
Shell rounded oval, conical, the apex a little anterior and directed 
forward; surface finely radiately striate; the striz: sometimes obso- 
lete; color blackish, more or less flecked or dotted with white, with a 
broad dark margin and dark-brown central tract which, in old shells, 
may be obscured by a white shelly deposit. Length about 35 mm. 
SCURRIA PARASITICA Orbigny. 
Patella parasitica OnpiGNy, Voy. Am. Mér., vol. 5, 1841, p. 481, pl. 81, figs. 1, 
2,3. Not of ReEve, 1855. 
Among other limpets collected at Mollendo. Of no economic importance. 
Mstribution.—From Valparaiso, Chile, north to Mollendo, Peru. 
Shell rounded, conical, dome shaped, solid, the apex at the anterior 
third, with the anterior slope straight, the posterior arched; surface 
finely radially striated; whitish or gray, with radiating blackish rays 
of varying width; inside white, brown in the central area, border 
yellowish white, mottled by the external rays. Length about 20 mm. 
CHITON CUMINGSII Frembly. 
Chiton cumingsti FREMBLY, Zool. Journ., vol. 3, 1827, p. 198, suppl. pl. 16, fig. 3.— 
Sowersy, Conch. Ill., 1841, Chiton, fig. 32. 
Amaurochiton cumingsii THIELE, Gebiss d. Schneck., vol. 2, 1893, p. 362. 
Barquillo. From rocks on the north side of the Callao water front and from tidal 
pool at La Punta, Callao; also from rocks on the shore at the Chincha Islands. Of no 
economic importance. 
Distribution.—F rom Chiloé Island north to Tumbes, Peru. 
