. Text book of zoology. Zoology. 202 Arthropoda. Glass 1. Crustacea. different forms, are in the direction of clumsiness, deformity, and im- mobility; tlie abdomoQ degenerates, the segmentation is Fig. 164. Various parasitic Copepoda : 1 Nogagus borealis, male from the ventral side. 2 Oaligus rapax, female from above. 3 Chondracanthus gihhosug, female from below ((? the male). 4 Brachiella thynni, female. 5 Male of the same species (more enlarged), a^âa^ first and second antennae, / oandal appendages, hk second maxilla, kf maxilliped, p^âp^ firstâfourth pairs of legs, o egg-sac.â
. Text book of zoology. Zoology. 202 Arthropoda. Glass 1. Crustacea. different forms, are in the direction of clumsiness, deformity, and im- mobility; tlie abdomoQ degenerates, the segmentation is Fig. 164. Various parasitic Copepoda : 1 Nogagus borealis, male from the ventral side. 2 Oaligus rapax, female from above. 3 Chondracanthus gihhosug, female from below ((? the male). 4 Brachiella thynni, female. 5 Male of the same species (more enlarged), a^âa^ first and second antennae, / oandal appendages, hk second maxilla, kf maxilliped, p^âp^ firstâfourth pairs of legs, o egg-sac.â1, 2, 4, 5 after St enstrup and Ltitken, 3 after Claus. those limbs, which do not serye as organs of adhesion, atrophy, or become functionless; this applies especially to the true legs, which are either wanting, have â ^ S G degenerated to mere ves- tiges (Fig. 165£), or have become large thick ap- pendages, without setee, exhibiting only feeble in- dications of their original form. Often such parasitic Crustacea are provided with peculiar outgrowths, rendering their appearance still more striking. As a rule they are blind. Where the reduction is most ad- vanced, the entire animal. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Boas, J. E. V. (Johan Erik Vesti), 1855-1935; Boas, J. E. V. (Johan Erik Vesti), 1855-1935. Lehrbuch der Zoologie. London, Sampson Low, Marston
Size: 1724px × 1449px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1896
