19. [BALANUS] AMPHITRITE. Pl. [5], fig. [2 a]-[2 o].
LEPAS RADIATA. Wood’s General Conchology (1815), Pl. 7, fig. 7.
---- MINOR? Wood’s General Conchology (1815), Pl. 7, fig. 6.
---- BALANOIDES. Poli. Testacea utriusque Siciliæ (1795), Tab. 5.
BALANUS BALANOIDES. Risso. Hist. Nat. de l’Europe Merid., tom. iv, 1826.
Shell longitudinally striped with purple or pink; sometimes with the stripes confluent; sometimes wholly white. Scutum internally with a prominent broad adductor ridge.
Var. (1) communis: ([2 e], [2 h], [2 l],) nearly white, with pale or dark violet-coloured longitudinal stripes: epidermis rarely persistent: shell either thin or thick: radii white or freckled with reddish mahogany colour, with their summits either oblique, sometimes in a high degree, or nearly parallel to the basis: basal point of spur of the tergum either square or bluntly pointed. Hab. Mediterranean, W. Indies, S. Africa, Philippine Archipelago, New South Wales.
Var. (2) venustus: ([2 a],) white or pale pink, with narrow bright pink, or broad pinkish-purple stripes; orifice either much dentated or nearly entire. Tergum with the carinal half of the basal margin sometimes much hollowed out. Hab. W. and S. Africa, Ceylon.
Var. (3) pallidus: ([2 c], [2 k],) white, with or without a yellowish persistent epidermis; sometimes with the edges of the compartments tinted purple: radii moderately oblique: tergum generally narrow, with the spur sharp, and the basal margin on its carinal side much hollowed out. Hab. W. Africa, Madagascar, Red Sea.
Var. (4) niveus: ([2 f],) white, with longitudinal hyaline lines; epidermis not persistent. Hab. W. Indies, Florida, S. Africa, &c.