NO. 1704. A COLLECTION OF SHELLS FRO^f PERU— BALL. 181 



ENOPLOCHITON NIGER Barnes. 



Plate 23, fig. 8. 



Chiton niger Barnes, Am. Journ. Sci., vol. 7, 1823, p. 71, pi. 3, fig. 3. 

 Chiton coquimbensis Frembly, Zool. Journ., vol. 3, 1829, p. 197, suppl. pi. 16, 

 fig. 2. 

 Barquillo. Collected at MoUendo. 



Distribution. — Valparaiso, Chile, and northward to Mollendo, Peru. 



Shell oblong, with rather elongate, strongly beaked, polished valves 

 of a dark brown inside and out, which are usually badly eroded; 

 girdle broad, fleshy, bearing numerous elongated, more or less widely 

 separated narrow scales, the interspaces having a velvety surface. 

 Length about 75 mm. 



This species is said to live on the rocks between tides, exposed to 

 the full force of the surf. The peculiar separated scales on the girdle 

 will always enable it to be identified. 



POLYPUS FONTAINEANUS Orbigny. 

 Plate 20, fig. 1. 



Octopus fontaineanus Orbigny, Voy. Am. Mer., vol. 5, 1835, p. 28, pi. 2, fig. 5. 

 Pulpo. Taken on the shore rocks, Lobos de Afuera Island, in March; and taken in a 

 trammel net at the Chincha Islands. Common and used as food. 



Distribution. — Coasts of Chile and Peru. 



Animal with eight arms, of a rich purple color, but the tint variable, 

 the surface obscurely granulose. Extreme length of specimens 

 examined about 25 centimeters. 



The details of its appearance will be very clearly recognized from 

 the figure above referred to. It has no internal shell or endostyle. 



LOLIGO GAHI Orbigny. 



Plate 21, figs. 1, 2. 

 Loligo gdhi Orbigny, Voy. Am. Mer., vol. 5, 1835, Moll., p. 60, pi. 3, figs. 1, 2. 



This species was not collected by Mr. Coker, who is, however, 

 familiar with it, and since it forms one of the economic species of 

 Peru, I have copied Orbigny's figure to make the report more com- 

 plete. Mr. Coker notes in regard to the names for the cuttlefish 

 (Octopus, Polypus) that it is called pulpo, or jibia. A large pulpo is 

 called chancharro. 



The squid (Loligo) is called calamar, a word doubtless derived from 

 the Latin calamarius, a pen bearer, in allusion to the internal endo- 

 style of the ten-armed cephalopods. To the larger specimens, those 

 2 feet or more in length, the name pota is given. Calamar, pulpo, 

 and jibia are proper Spanish names, pota and chancharro probably 

 of local origin. 



