264 
towards the mobile finger. The lower margin is an acute 
ridge, bearing a row of small teeth, which reach to the end 
of the immobile finger. The oblique outer surface is covered 
witli a dense mass of plumose or ciliate liairs, whicii end 
abruptly at tlie ridge, the under surface being quite glabrous. 
Tlie mobile finger bears a longitudinal row of well-developed 
teeth on tlie outer side, on a ridge which sharply marks the 
hairy portion from the glabrous. The fingers are crossed at 
their apices, and each has an internal large tooth. 
The three pairs of ambulatory legs are short, robust, and 
mostly smooth, very hairy. The propodi have a series of 
spines behind. The dactyli are short, curved, and end in two 
claws ; behind these there are two or three strong spines. The 
last pair is very slender and chelate. 
The pterygostomial regions are somewhat excavate, and 
are crossed by a rather sigmoid ridge. 
The pleon of the female is very longf and partially over- 
laps the external maxillipeds : it is smooth or slightly punc- 
tate. The first joint is narrow at first, but soon becomes as 
wide as the second, these become successively broadei till tlie 
fifth inclusive, the sixth is slightly concave at the sides, and 
bears a pair of well-developed, biramous uropods. The last 
segment is composed of seven plates, one median and triangu- 
lar, the others lateral, the most proximal of which is very 
small compared with the others, the two distal plates form the 
termination. 
Lengtli of carapace, 8 mm. 
Width of carapace, 11 mm. 
Length of cheliped, 19 mm. 
Length of tirst ambulatory leg, 10 mm. 
Dredged by Dr. Verco, 17 fms., off Newland Head, S.A. 
One specimen, a female, in Adelaide Museum. 
Genus Fcfrolisflics, StimjDSon. 
Sub-genus Fef7'ocJieIes, Miers. 
Petrocheles australiensis, Miers. 1 1. xxxvi , Hgs. 1, 1«. 
Petrocheles australiensis, Cat. Crust., N.Z., p. 61. 
Petrocheles australiensis, Cat. Aust. Crust., p. 174. 
The body is nearly flat, covered with scale-like promi- 
nences, wnich are small on the uj^per surface of the carapace, 
but larger on the appendasfes. From the scales arise short, 
harsn hairs, which, again, are more developed on the limbs. 
The carapace is obcordate, slightly convex in the trans- 
verse direction, less so in the antero-posterior. The cervical 
groove is well marked and wide. The protogastric region 
bears anteriorly just behind the orbits two low spines, follow yj 
by some scale-like tubercles, more pronounced than those of 
