1878.] MR. E. J. MIERS ON THE PENjEIDJE. 309 



ture from those of the species of Penceus. There are, however, 

 other points in which the genus Aristeus differs from Penceus, and 

 which seem to warrant the retention of Duvernoy's generic name. 

 The two flagella of the antenuules 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 membrana- 

 ceous, as in Penceus ; 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 Penceus, but the antero-lateral angles 

 are rounded. 



Duvernoy established the genus upou specimens from Nice, which 

 he referred, no doubt correctly, to the Penceus 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 be 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 WOODWARDI. 



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. 



