OCR Text |
Show 1899.] PARASITIC COPEPODA O N FISHES. 491 antennas slender, with three joints. Posterior large, trifurcate. There are four pairs of rudimentary limbs, the first biramose. Ovarian sacs long ; ovules multiserial. Male pigmy, like those of Chondracanthus. (1) TRICHTHACERUS PERISTEDII. 2 cf • Trichthacerus peristedii Kr. Bidrag til Kundskab, 1863, p. 264. pl. xiv. fig. 7. Host: gills of Peristethus sp. Bio Janeiro. (2) TRICHTHACERUS MOLESTUS. 2 • Trichthacerus molestus Heller, Beise d. Novara, 1865, p. 233, pl. xxiii. fig. 5. Host: gills of Prionotus punctatus. Brazil. G. 6. BLIAS Kroyer. Head rounded, separated by a constriction from the smooth, thick, oval body, which is unsegmented and without processes. Abdomen biarticulate, small, with two short terminal setas. Anterior antennae short, thick. Posterior are two-jointed, uncinate. Mouth at the posterior part of the head. Two pairs of single branched articulate limbs are present. Male pigmy, like those of Chondracanthus. BLIAS PRIONOTI. 2 cf • Aethon prionoti Kllr. Ann. Wien. Mus. Blias prionoti Kr. Bidrag til Kundskab, 1863, p. 262, pl. xii. fig. 5. Host: gills of Prionotus punctatus. Brazil. G. 7. CHONDRACANTHUS. De la Boche. (Lernentoma Blainv.) Head distinct, separated from the body by a more or less constricted neck. Thorax indistinctly biarticulate, bearing two pairs of lobe-like limbs. Genital segment compressed with concave borders, or provided with irregular globose or elongated processess. Abdomen distinctly articulated, placed between the two posterior horns. Anterior antennae 2-or 3-jointed, Posterior uncinate, strong. Mouth and appendages placed a little behind these. External ovaries large ; ovules multiseriate. Male pigmy; the cephalothorax carries the strong book-like posterior antennas (or hooks of attachment) on the dorsal surface; abdomen segmented ; thoracic limbs iticulate. (1) CHONDRACANTHUS CORNUTUS. Q 2 • Lerncea cornuta Mull. Zool. Dan. i. 1776, pl. xxxiii. fig. 6. Entomoda cornuta Lamarck, Hist. A n mi. sans Vert. viii. 1818. Anops cornuta Oken, Lehrbuch Naturg. iii. 1815. Lernentoma cornuta Blainv. Diet. Sc. Nat. xxvi. 1823, p. 126. |