REPOET ON THE BRACHYURA. 
71 
the next (mobile) joint is not dilated ; the merus of the exterior maxillipedes is broadly 
rounded at its antero-external angle ; the chelipedes (in the adult male) are moderately 
developed ; merus and arm granulated, but without spines ; palm rather short and 
moderately enlarged, granulated ; fingers smooth, acute, and, when closed, meeting only 
at and near the tips ; the ambulatory legs are densely hairy. An adult male has the 
following dimensions : — 
Adult . 
Lines. 
Millims. 
Length, of carapace to base of rostrum, 
6 
12-5 
Breadth of carapace, ..... 
o 2 
11-5 
Length of a chelipede, about .... 
7 
15 
Length of first ambulatory leg, about . 
71 
1 2 
16 
Habitat . — Bass Strait; a female was found among the fishes of H.M.S. Challenger’s 
collection, and two males are in the present collection from East Moncceur Island ; 
lat. 39° 10' 30" S., long. 146° 37' 0" E. (Station 162). 
This variety is distinguished by the absence of spines from the dorsal surface of the 
carapace and by the form of the front, which has subparallel sides, and is much less deeply 
notched at the distal extremity. 
Family III. Peeicerida 
Periceridx, Miers, Journ. Linn. Soc. Lond. (Zool.), vol. xiv. pp. '640-662, 1879. 
Eyes retractile within the small circular and well-defined orbits, which are not 
incomplete as in the Maiidse. Basal antennal joint well developed, and constituting a 
great part of the inferior wall of the orbit ; this joint is usually very considerably 
enlarged. 
Subfamily 1 . Pericerina. 
Pericerinx, Miers, Journ. Linn. Soc. Lond. (Zool.), vol. xiv. p. 662, 1879. 
Carapace more or less subtriangulate in shape. Bostrum well developed. Second 
joint of antennas not dilated. Chelipedes with the fingers acute at tips. 
In this subfamily are included what may be regarded as the typical Periceridse, in 
which the rostral spines are well developed and often in contact one with another. The 
interorbital space is usually broad, and the orbits tubular ; the basal joint of the antennae 
is usually much enlarged, the epistoma short, the legs of moderate length, and the fingers 
acute at the tips. 
The following genera are to be added to this subfamily : — Entomonyx, Miers, 
Picroceroides, n. gen., and probably Sisyphus, Desbonne and Schramm. 
