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Show 1878.] MR. E. J. MIERS ON THE PEN^EID^E. 309 ture from those of the species of Peneeus. There are, however, other points in which the genus Aristeus differs from Peneeus, and which seem to warrant the retention of Duvernoy's generic name. The two flagella of the antennules are very unequal; one is extremely short, the other remarkably long, as long as the animal itself; the palpi of the mandibles are robust, not foliaceous and membranaceous, as in Peneeus ; the fifth pair of legs is very long and slender, not shorter than the preceding pair; the first pair of postabdominal appendages terminate in a single ramus, the second ramus being rudimentary or entirely absent. I may add that the anterior margin of the first postabdominal segment does not form an angle with the lateral margins, as usual in Peneeus, but the antero-lateral angles are rounded. Duvernoy established the genus upon specimens from Nice, which he referred, no doubt correctly, to the Peneeus antennatus of Risso (Hist. Nat. Eur. Merid. v. p. 68, 1826). P. edwardsianus resembles in general appearance the figure of P. antennatus given by Duvernoy ; but the carapace is marked with strong ridges upon the hepatic, pterygostomian, and branchial regions, the last postabdominal segment is not sulcate above, and the rami of the postabdominal appendages, especially of the first pair, are much longer. There are also some marked differences in the mouth-appendages which can scarcely he due to inaccurate drawing of the details of Aristeus antennatus; the palpus of the mandible in A. edwardsianus is much more robust than in the Mediterranean species, is densely hairy, and the third joint is bilobate; the exognath of the second pair of maxillipedes is very long, reaching beyond the end of the antennal scale, and more than twice the length of the endognath itself, while that of the third pair of maxillipedes is quite short. The specimen is a female. The genus Xiphopeneus of Smith (referred to above) resembles Aristeus in the form of the carapace and rostrum, and length of the posterior legs and postabdonimal appendages; but there does not exist the marked disparity in length in the flagella of the antennules, nor is it stated that the mandibular palpi and rami of the first pair of postabdominal appendages differ from those of the ordinary Pencei. FUNCHALIA WOODWARD! Funchalia woodwardi, Johnson, P. Z. S. 1867, p. 896. The mouth-organs of the unique example of this remarkable form (which is in the British-Museum collection) have not been dissected ; but the long, corneous, and somewhat sickle-shaped processes of the mandibles are plainly visible, and suffice to establish its generic distinctness ; the " broad lamellar appendage " at each side of the mouth, referred to by Mr. Johnson, is evidently the foliaceous palpus of the mandible, the terminal joint of which is large and truncated at its distal extremity. The specimen is a female. |