A history of the British sessile-eyed Crustacea . he obtained a male and fivefemales of that species from the carapace of a Cheloniamydas, thrown upon the shore near Ostend, which wouldindicate a carnivorous condition of life for that species. In a memoir on the relation which this genus holdsto the order of Isopoda,* Prof. Lilljeborg unites inthis genus not only Crossurus of Rathke, but also Para-tanais and Leptochelia of Dana. By so doing he findshimself compelled to commence by separating thatdivision of the genus which carry two branches to theposterior pair of pleopoda from those that car
A history of the British sessile-eyed Crustacea . he obtained a male and fivefemales of that species from the carapace of a Cheloniamydas, thrown upon the shore near Ostend, which wouldindicate a carnivorous condition of life for that species. In a memoir on the relation which this genus holdsto the order of Isopoda,* Prof. Lilljeborg unites inthis genus not only Crossurus of Rathke, but also Para-tanais and Leptochelia of Dana. By so doing he findshimself compelled to commence by separating thatdivision of the genus which carry two branches to theposterior pair of pleopoda from those that carry butone. We think that it is more convenient, in our presentstate of knowledge, to keep apart as much as possibleanimals possessing a marked structural distinction. Wetherefore retain in this work Danas genus of Para- TANAIS. Bidrag till Kiinnedomen om de inom Sverige och Norrige fore Kom-mande crustaceer af Isopodernas imderordning och Tanaidernas Wilhelm Lilljeborg. Upsala 1864. TANAIS VITTATUS. ISO POD A. ABERRANTIA. 125 TANAIS VITTATUS. Specific character. Body rather short, with the segments of the pleonclothed with transverse fascicles of long fine hairs. Superior antennwthicker and longer than the inferior, three-jointed, setose at the tip. Ce-phalon and first segment of the pereion mottled with dark lines, forming ovalpatches; second pair of gnathopoda shorter than the following, several ofthe posterior pairs of legs terminated by a sickle-shaped finger, with a tooth atthe middle of its inner edge, and serrated along the base. Length two lines and a quarter. Crosswus vittatus. Rathke, Nov. Act. 20, pi. i. fig. 7. Tanais viUatus. Lilljeboro, Bidrag till Kiinnedomen om de inom Sverige och Norrige Forekommande crust, af Isop. underord. och Tanaid. famil. p. 24. 1864, de Costa (?). Andouin and Edwards, R&ume dEntomologie, t. i. pi. xxix. fig. Cavolini (?). Edwards, Hist. Nat. Crust, iii. p. 141, pi. xxxi. fig. 6. Notwithstandin
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