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Blenniida

dorsal, head and upper

BLENNIIDA.

Head 4.2; depth 4.3. Dorsal XII, 20; anal 23. Head slightly longer than deep; anterior profile vertical, slightly concave. Eye 3.25 in head. Pecto rals reach to vent or beyond in male, not quite to vent in female. Ventrals 1.5 in head. Upper lip of male large; teeth pectinate; canines large; fringe around upper and lower lips; upper lip pigmented, lower not pigmented in spirit specimens, yellow in life. Supraocular tentacles slender; large ten tacle medial to each anterior nostril, which divides into 5 or 6 tentacles; two nuchal tentacles in male, smaller in female. Numerous large pores on head, one group behind and below eye, another on supraopercular region. Dorsal fin entire, extending from nape to caudal; last dorsal ray bound down for two-thirds of its length; last anal ray free. Last dorsal and last anal rays small; do not show except in radiograph.

Differs generally from

A. atlanticus in coloration. General color brownish,

livid purplish on costal region; filaments above eyes and edges of lips bright orange. Iris slaty. Dorsal olive-greenish with median dusky lengthwise band anteriorly, contrasting strongly with whitish or pale upper half of fin, but sloping up behind so that edge of dorsal is dusky posteriorly. Upper front edge of dorsal broadly orange below, with submarginal area of whitish. Caudal olivaceous, dusky medially, grayish below, yellowish above; anal dark neutral tint, edge blackish; pectoral pale orange, red on lower half; ventral pale. Vertebra 12+22.

Two specimens from dead coral reef west of Guanica Harbor.

Type, No. 3081, Zoological Museum, Princeton University; 5.5 cm. long. Paratype, No. 3027, Zoological Museum, Princeton University; 5 cm. long. Named for Professor C. F. W. McClure, for his researches upon the lym phatics of fishes.