. Bulletin - United States National Museum. Science. The iiropoda are as long as the terminal abdominal segment. The outer branch is slightly shorter than the inner branch. Both are equal in width, and narrow, with extremities rounded. The legs are all prehensile, with short, stout, curved clac- tyli. There is a high carina on the basis of the last four pairs, the carina increasing gradual!}^ from the fourth to the seventh pair, where it is extremely ;. 42. Genus LIVONECA Leach'. Body sul^oval, more or less twisted. Head most always deeply immersed. First pair of an- tennae widel}^
. Bulletin - United States National Museum. Science. The iiropoda are as long as the terminal abdominal segment. The outer branch is slightly shorter than the inner branch. Both are equal in width, and narrow, with extremities rounded. The legs are all prehensile, with short, stout, curved clac- tyli. There is a high carina on the basis of the last four pairs, the carina increasing gradual!}^ from the fourth to the seventh pair, where it is extremely ;. 42. Genus LIVONECA Leach'. Body sul^oval, more or less twisted. Head most always deeply immersed. First pair of an- tennae widel}^ separated at the base, rather compressed. Anterior margin of the first thoracic segment widely sin- uated in the middle, more or less sinuated or incised at the antero- lateral angles. Abdomen very little immersed, continuous with thorax, not nar- rower than thorax. Fig. •2t)4.—Cymothoa cestrum. o, Maxilliped. 6, Seventh leg. x 4^. c, First maxilla. d, Second maxilla. x 15^. e, Mandible. /, Palp op mandible, x 15^. X 15i. X 15i. x 15i. ANALYTICAL KEY TO THE SPECIES OF THE GENUS LIVONECA. a. Abdomen somewhat immersed in thorax, the sides of the first segment being almost entirely covered by the seventh thoracic segment. h. Head quadrate, but little broader at the base than at the anterior end. Linmeca panamensis Schitt^dfe and Meinert b^. Head triangular, nearly twice as broad at the base as at the anterior extremity. r. Head roundly truncate in form. Terminal segment of abdomen nearly twice as l)road as long Livoneca vulgaris Stimpson (•'. Plead narrowly rounded in front. Terminal segment of abdomen about as long as broad Livoneca caUfornica Schitx'dte and Meinert a^. Abdomen not immersed in thorax, the sides of the first segment free. «For complete description of this form, the male and female and the young of the first and second stages, see Schioedte and Meinert, Nat. Tidsskr. (3), XIV, 188:5-84, pp. 271-278. Please note that these images are extracted from scanned pa
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
