A history of the British sessile-eyed Crustacea . om Proto in several importantpoints : among the most conspicuous is the very rudi-mentary character of the third and fourth pairs of legs,which are represented by two small, uni-articulate, leaf-like plates. The penultimate segment of the body is asshort as the last; consequently, the last three pairs oflegs are situated closely together at the posterior ex-tremity of the animal. Branchiae are attached to tliethird and fourth segments of the body, which, in thefemale, have also attached the plates belonging to tlieincubatory pouch. This genus v
A history of the British sessile-eyed Crustacea . om Proto in several importantpoints : among the most conspicuous is the very rudi-mentary character of the third and fourth pairs of legs,which are represented by two small, uni-articulate, leaf-like plates. The penultimate segment of the body is asshort as the last; consequently, the last three pairs oflegs are situated closely together at the posterior ex-tremity of the animal. Branchiae are attached to tliethird and fourth segments of the body, which, in thefemale, have also attached the plates belonging to tlieincubatory pouch. This genus vi^as established hy Dana, as possessing acharacter intermediate between that of Proto and Ca-prella, from which last it is distinguished by the characterof the appendages of the intermediate segments of thebody. Our knowledge of this genus is, as yet, confined totwo species, one belonging to Britain, the other to SouthAmerica; therefore its geographical range cannot pro-perly be estimated. PROTELLA PHASMA. AMPJIIPODA. ABERRANTIA. 45 PROTELLA Skeleton Shrimp. Specific character. Cephalon, -nitliout a rostrum, dorsally armed with astrong spine, originating in the posterior margin and directed upwards andforwards. First segment of the pereion dorsally and posteriorly armed witha strong tooth ; second segment similarly armed with a pair near the middle,and one near the posterior margin. Length rather more than half an inch. Cancer pliasma. CaprcUa ? jthasma. ^gma lonyhpina. Montagu, Trans. Linn. Soc. vii. p. 66, pi. vi. fig. , Syst. des An. sans Vert. v. p. , Encyc. Met. p. 336, fig. 37. Leach, Edin. Encyc. vii. p. 404. Enc. Brit. Suppl. 1, p. 426. Samouelle, Ent. Comp. p. 105. Desmarest, Consid. sur Crust. p. 278. Milne Edwards, Hist, des Crust. iii. p. 108. White, Cat. Crust. Brit. Mus. 1847. Cat. Brit. Mus. 1850, p. 60. Pop. Hist. Brit. Crust, p. 216. Fleming in Edin. Phil. Journ. viii. p. 297.
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Keywords: ., bookauthor, bookcentury1800, bookdecade1860, booksubjectcrustacea
