REPORT ON THE BRACK YURA. 
309 
Ebalia [Phlyxia) undecimspinosa (Kinahan), var. orbicularis. 
1 Bellidilia serratocostis, Kinahan, Journ. Roy. Dublin Soc., vol. i. p. 129, 1858. 
? „ undecimspinosa, Kinahan, tom. cit., p. 128, pi. iii. fig. 2, 1858, var. 
Plilijxia orbicularis, Haswell, Proc. Linn. Soc. N.S.W., vol. iv. p. 54, pi. vi. fig. 2. 1880; Cat. 
Australian Crust., p. 125, 1882. 
Port Jackson (Sow and Pig’s Bank), 6 fathoms, 8 to 15 fathoms (two adult females), 
8 fathoms (an adult male and female); South Australian Coast, 2 to 10 fathoms, April 
1874 (numerous specimens). 
The largest male presents the following dimensions : — 
Adult . 
Lines. 
Millims. 
Length of carapace, rather over .... 
. Ill 
24-5 
Breadth of carapace, rather less than . 
. 1U 
24 
Length of a chelipede, .... 
271 
58 
Length of first ambulatory leg, about . 
15 
32 
Although commonly occurring with Plilyxia crassipes, this is a perfectly distinct 
species, characterised by the less prominent front and the absence of tubercles from the 
gastric and branchial regions of the carapace, which has, besides the three prominent 
posterior tubercles, only some smaller ones upon the lateral margins, and occasionally two 
or three upon the median longitudinal carina ; the fuscous markings, characteristic of 
Plilyxia crassipes, do not exist in the specimens of Phlyxia orbicularis I have examined. 
It also attains a larger size than Phlyxia crassipes, and has a more depressed and more 
regularly orbiculate carapace. 1 
Ebalia ( Phlyxia ) quadridentata, Gray, var. spinifcra (PI. XXV. fig. 3). 
? Ehalia quadridentata, Gray, Zool. Miscell., vol. ii. p. 40, 1831. 
? Phlyxia quadridentata, Stimpson, Proc. Acad. Nat. Sci. Philad., p. 160, 1858. 
Phlyxia quadridentata is only known to me by the very short and insufficient 
diagnosis of the late Dr. Gray, which, as regards the tubercles of the dorsal surface of 
the carapace, does not accurately apply to any species of this genus. 
It is not improbable that the Challenger specimen, of which a description follows, 
may belong to a distinct species. 
Carapace moderately convex, rather longer than broad, covered with small granules 
and with larger granules (or small spiniform tubercles) which are disposed as follows : — 
three in a triangle on the gastric region, one on the cardiac region, one or two on each 
1 I refer to this species under Haswell’s name, Phlyxia orbicularis, because Kinahan’s Bellidilia serratocostis is so 
briefly characterised, that its identification with Phlyxia orbicularis must remain uncertain, and I am unable to discover 
the Tasmanian type specimen, which, according to Kinahan, existed in the collection of the British Museum. Bellidilia 
undecimspinosa, Kinahan, differs from all specimens I have seen in possessing an additional tooth on each postero -lateral 
margin, and should (I think) be regarded at least as a distinct variety. 
