REPORT ON THE BRACHYURA. 
311 
or teeth, three of which are placed midway between the front and posterior margin, and 
one near the postero-lateral margin ; the front is prominent and truncated, and four- 
toothed, the teeth separated by nearly equal notches ; there is also a tooth at the exterior 
angle of the orbit. The post-abdomen (in the female) covers the whole of the sternal 
surface of the body between the bases of the legs, and has all of the segments, except 
the two first and the last, coalescent ; the first and second segments are granulated ; the 
terminal segment is narrow and deeply encased in a cavity of the sternum, which attains 
the bases of the outer maxillipedes. The maxillipedes are coarsely granulated, their 
exognathi robust, with a nearly straight outer margin, and rounded at the distal 
extremity, which does not quite attain the acute apex of the merus of the endognath. 
The chelipecles (in the female) are moderately elongated and closely granulated, but not 
so coarsely as the carapace, and the joints are without spines or teeth ; the merus is sub- 
cylindrical ; the palm is slightly compressed, but not carinated ; fingers about as long as 
the palm, compressed, with the tips incurved, obscurely denticulated on their inner 
margins, and faintly longituclinally-sulcated on the sides. The ambulatory legs are 
slender, with the antepenultimate joints angulated ; the penultimate joints slightly 
dilated and carinated on the superior and inferior margins, and shorter than the slender 
dactyli. Colour of carapace (in spirit) greyish or brownish ; the legs paler. 
The best-preserved specimen presents the following dimensions : — 
Adult 9 . 
Length of carapace, 
Breadth of carapace, nearly 
Length of a chelipede, rather over 
Length of first ambulatory leg, 
Lines. Millims. 
5 10-5 
5 10 
5 11 
H 9-5 
Two females were dredged in 2 to 10 fathoms, in April 1874, on the South Australian 
coast. 
The form, granulation, and spinulation of the carapace distinguishes this from any 
species with which I am acquainted. 
Persephona, Leach. 
Persephona, Leach, Zool. Miscell., vol. iii. pp. 18, 22, 1817. 
„ Milne Edwards, Hist. Nat. Crust., vol. ii. p. 136, 1857. 
„ Dana, U.S. Explor, Exped., vol. xiii., Crust. 1, p. 392, 1852. 
„ Bell, Trans. Linn. Soc. Lond., vol. xxi. p. 292, 1855. 
Guia , Milne Edwards, Hist. Nat. Crust., vol. ii. p. 127, 1837. 
The characters separating this genus from Myra are very slight. Persephona is, in 
fact, scarcely distinguishable from Myra , except by the somewhat more depressed and 
orbiculate carapace, the more transversely plicated antennules, the much more robust 
chelipedes and ambulatory legs (the palms and fingers of the chelipecles being dilated 
