No. 1704. A COLLECTION OF SHELLS FROM PERU—DALL. ae 
Genus HELCIONISCUS Dall. 
HELCIONISCUS NIGRISQUAMATUS Reeve. 
1854. Patella nigrisquamata ReEve, Con. Icon., Patella, fig. 3. 
Concepcion, Chile. 
Family ACM AIDA. 
Genus SCURRIA Gray. 
SCURRIA MESOLEUCA Menke. 
1851. Acmea mesoleuca MENnKE, Zeitschr. f. Mal., p. 38.— 
Patella striata REEVE, Con. Icon., Patella, fig. 99; not P. 
striata Quoy. Gulf of California, and south to Guayaquil 
~and the Galapagos Islands. 
SCURRIA PARASITICA Orbigny. 
1841. Putella parasitica OrBieny, Voy. Am. Mér., p. 481, pl. 81, 
figs. 1-3; not of Rerve. Mollendo, Peru, and south to Val- 
paraiso, Chile. 
SCURRIA SCURRA Lesson. 
1830. Patella scurra Lesson, Voy. Coq., p. 421.—Orpteny, Voy. 
Am. Mér., p. 478, pl. 64, fig. 11, 1841. From Callao, Peru, 
south to S. lat. 41°, living on the stalks of Macrocystis. 
SCURRIA ZEBRINA Lesson. 
1830. Patella zebrina Lusson, Voy. Coq., p.417.—Acmexa zebrina 
Orpieny, Voy. Am. Mér., p. 480, pl. 65, figs. 1-3,1841. Mol- 
lendo, Peru, and south to the Magellanic region. 
Genus ACMAZA Escechseholtz. 
ACMA ALBESCENS Philippi. 
1846. Zeitschr. f. Mal.,p. 50. Abb., vol. 3, p. 118, pl. 2, fig. 7. 
1849. Central Chile. 
ACMA ARAUCANA Orbigny. 
1841. Voy. Am. Mér., p. 482, pl. 65, figs. 4-6; not of RmEvVE. 
Paita, Peru, and south to Valparaiso, Chile. 
ACMA CECILIANA Orbieny. 
1841. Patella ceciliana Orgieny, Voy. Am. Mér., p. 482, pl. 81, 
fies. 4-6. Antofagasta to Valparaiso, Chile. 
ACMZA COFFEA Reeve. 
1855. Patella coffea Renve®, Con. Icon., Patella, fig. 139. Val- 
paraiso. 
ACMA ORBIGNYI Dall, new name. : 
1909. Acmxa scutum Orpieny, Voy. Am. Mér., p. 479, pl. 64, 
fies. 8, 9, 1841. Not of Escuscnourz, Zod]. Atlas, part 5, 
p-. 19, pl. 23, figs. 1-3, 1833. Salaverri, Peru, and the Gala- 
pagos Islands, and south to the Magellanic region. 
ACMZA VARIABILIS Sowerby. 
1839. Zodl. Beechey’s Voy., p. 147, pl. 39, fig. 5(only). Whole 
Peruvian Province, and the Galapagos Islands. 
