(sect, c), balanus LJ5VJS. 227 



16. Balanus l^evis. PL 4, fig. 2 — 2y. 



Balantjs l^vis. Bruguiere. Encyclop. Meth. (1789), PL 164, 



fig. 1.* 



— discors. Ranzani. Mem. di Storia Nat., 1820, Tab. 3, 



figs. 9 to 1.3. 



— coquimbensis. G. B. Sotoerby, in Darwin's Geology of 



South America (1846), Tab. 11, fig. 7. 



Shell covered by brown membrane, or naked and white or 

 pale purple ; orifice small ; radii very narrow. Scutum with 

 one or two deep longitudinal furrows. 



Var. nitidus (fig. 2) : shell not covered by membrane, white or pale 

 purple : orifice but slightly toothed: scutum generally with two furrows. 

 Hab. — Chile, as far south as Conception ; Peru ; California. 



Var. Coquimbensis (fig. 2 a) : with the basal cup partly filled up 

 with thin, irregular, calcareous layers, making a cancellated mass. 

 Fossil, and recent. 



Hab. — Strait of Magellan, ten to twenty fathoms, attached to shells; 

 often entirely surrounding pebbles, forming globular masses ; associated with 

 Verruca Icevigata. Chile and Peru, (generally var. nitidus), often attached to 

 Balanus psittacus. California. Very common. 



Fossil in an ancient tertiary formation (middle bed) at Coquimbo, Chile. In 

 a recent deposit {var. nitidus) at the height of 1000 feet at Valparaiso ; with 

 Human remains at San Lorenzo, Callao, Peru. 



I may premise that, having myself collected this species 

 from the same locality, the Strait of Magellan, where no 

 allied species occurs, attached to the same Mytilus and 

 associated with the same Verruca, I feel confident that it is 

 the B. Icevis described by Bruguiere ; and there can hardly 

 be any doubt that it is the B. discors of Ranzani. With 

 respect to the old tertiary specimens from Coquimbo, 

 named B. Coquimbensis by Sowerby, they differ from the 

 recent in no respect, except in being considerably larger; 

 and therefore I cannot consider them specifically distinct. 

 At first I was unwilling to believe that the specimens with 



* M. Deshayes, in his descriptions of the plates, considers this figure, I have 

 no doubt erroneously, as that of B. perforates, of Bruguiere. The B. Coquim- 

 bensis of Sowerby, is a different species from the B. Coquimbensis, of Clienu, 

 ' Illust. Conch.,' tab. 6, which latter is unknown to me. 



