A history of the British sessile-eyed Crustacea . owever,very short, and abbreviated at the sides, which neverthe-less terminate in an acute point; and that the three fol- VOL. II. U 290 JEGWM. lowing joints of the pleon are large and broad, theposterior lateral angles being produced into a curved andacute pointj—we shall be convinced that Rocinela Danmo-niensis is the type of a distinct genus, and that jE^amonophthalma of Johnston, which M. Milne Edwards,followed by Mr. A. White, introduces into the genusRocinela on account of the large size of the eyes, ought tobe referred to the genus JEga.
A history of the British sessile-eyed Crustacea . owever,very short, and abbreviated at the sides, which neverthe-less terminate in an acute point; and that the three fol- VOL. II. U 290 JEGWM. lowing joints of the pleon are large and broad, theposterior lateral angles being produced into a curved andacute pointj—we shall be convinced that Rocinela Danmo-niensis is the type of a distinct genus, and that jE^amonophthalma of Johnston, which M. Milne Edwards,followed by Mr. A. White, introduces into the genusRocinela on account of the large size of the eyes, ought tobe referred to the genus JEga. This opinion is confirmedby the descriptions of the mouth-organs given by M. MilneEdwards in the Crochard edition of the Regne Animalof the species which he terms Rocinela ophthalmica (givingerroneously Leach as the author of the species), whichprove that that species is in fact an ^ga, differing onlyfrom u^ga emarginata in the apparent soldering togetherof the two terminal joints of the foot-jaws. ROCINELA DANMONIENSIS. 291. ROCINELA DANMONIENSIS. Specific character. Elongate-ovate ; eyes converging anteriorly, large,nearly joining dorsally; basal joints of the upper antennte subcylin-drical; coxa (especially of the three posterior pairs of pereiopoda) prominent,elongate-ovate, and pointed ; second, third, and fourth segments of the pleonsickle-shajjed and laterally produced. Length, one inch. Rocinela Danmoniensis. Leach, Diet. Sci. Nat. xii. p. 349. Desmarest,Crust, p. 304. Milne Edwards, Crust, 244. White, Cat. Brit. Crust, p. 80. Brit. Crust, p. 352. This species has hitherto been known only by original typical specimen taken half a century agoin Plymouth Sound, preserved in the British Museum,which has supplied the materials for the figures given atthe head of this description. It was described by Leachas being en si mauvais etat quil est impossible den U 2 292 faire une description specifique. Tlie posterior segmen
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Keywords: ., bookauthor, bookcentury1800, bookdecade1860, booksubjectcrustacea
