310 
THE VOYAGE OF H.M.S. CHALLENGER. 
branchial region, one on the hepatic and pterygostomian regions, and three or four on the 
Lateral margins ; and with a posterior median spine, on either side of which is a smaller 
triangulate lobe or tooth. The front is prominent, and is quadridentated, the lateral 
somewhat stouter but not more prominent than the median teeth, which are separated by 
a deeper fissure than that between the median and lateral teeth. The orbits have three 
deep fissures as in other species of the genus. The surface of the sternum and post- 
abdomen is minutely granulated, the post-abdomen without tubercles, and with all of the 
segments except the last coalescent, but with indications of the suture defining the basal 
segment, and with a protuberance at base on each side of the compound segment. The 
maxillipedes are covered with prominent granules, similar to those of the carapace ; their 
exognathi have a nearly straight outer margin and attain nearly to the distal extremity 
of the merus of the endognath. The chelipedes are moderately elongated and slender ; 
merus subcylindrical and granulated, the granules of the posterior surface larger than the 
others ; carpus short, palm compressed but scarcely carinated, both carpus and palm are 
granulated on their exterior margins ; fingers about as long as the palm, compressed and 
crossed at the tips, with scarcely any indications of deuticules on the inner margins. 
Ambulatory legs very slender; dactyli longer than the penultimate joints. Colour (in 
spirit) light yellowish-brown. 
The single specimen has the following dimensions : — 
6 • 
Lines. 
Millims. 
Length to base of posterior spine, about 
3 
6-5 
Breadth of carapace, rather under 
3 
6 
Length of a chelipede, about . . . . 
5 
11 
Length of first ambulatory leg, about . 
H 
7-5 
and was dredged at Port Jackson (Sow and Pig’s Bank), in 6 fathoms. 
In the arrangement of the tubercles of the dorsal surface of the carapace and in other 
points this form nearly resembles Ebalia granulosa , x dredged, according to Haswell, by 
H.M.S. Challenger, outside of Sidney Heads in deep water; the latter, however, differs in 
the bidentate front, carinated palms of the chelipedes, &c., and has not the prominent 
median posterior spine which exists in Plilyxia quadridentata (?), var. spinifera. 
Ebalia ( Phlyxia ) dentifrons, n. sp. (PI. XXV. fig. 4). 
The carapace is longer than broad, and moderately convex ; it is covered, both above 
and below, with close-set prominent granules ; its dorsal surface is very uneven, having 
several rounded prominences separated by marked intervening depressions ; of these, one 
(very prominent) is situated on each hepatic region, one on each branchial region, and 
one on each intestinal region. The lateral margins bear, on each side, four small spines 
1 Phlyxia granulosa, Haswell, Proc. Linn. Soc. N.S. W., vol. iv, p. 55, pi. vi. fig. 3, 1880 ; Cat. Australian sessile- 
eyed Crust., p. 126, 1882. 
