96 
middle, edges over the eyes considerably thickened. Hands, outside 
with a double row of serratures extending to near the end of the fixed 
claw ; inside edge serrated with four teeth and one tooth at the end ; 
moveable claw with six or seven teeth placed irregularly but chiefly 
on the ridge ; claws elongated, inner edge with a few bluntish teeth, 
the end somewhat hooked. Wrist with each of the lateral edges 
furnished with two strong teeth or spines. Carapace smooth along 
the back ; the sides of the front portion with a few spines, which on 
the lower part are almost reduced to tubercles; hinder part of the 
carapace separated from the front portion by a very deep groove, each 
of the sides in front with two spines; the sides of this portion are 
thickly covered with tubercles, which increase in size as they approach 
the back. Abdomen smooth on the dorsal line, the sides spined; 
the first segment with a large prominent spine on each side of the 
first segment; second segment with twelve or thirteen spines, four or 
five on each edge of the dilated part, the other two larger and situated 
on the sides; the spines are more or less conical and sharp, the one 
on each side nearest the back blunt; the third, fourth and fifth seg¬ 
ments with eight spines each, placed transversely, the two inner 
bluntest; the sixth segment with ten or eleven small spines or 
tubercles ; the seventh or terminal segment with seventeen or eighteen 
small sharp spines arranged in a crescent-like figure, the convexity 
being outwards. The two posterior pairs of legs with the penultimate 
joint on the outside furnished with two rows of serratures. 
Carapace and legs in the dead specimen of a dirty yellowish brown 
hue, tinged on the carapace with red. In Dr. Shaw’s figure, which 
slightly differs from PL XV., this crayfish is coloured of a bright red, 
the sides of the claws, carapace and abdomen, are tinged with blue; 
the specimens, however, were preserved in spirits. Dr. Shaw does 
not mention from what part of New Holland the specimens described 
by him were received; I cannot find any trace of them, neither does 
any author that I am aware of refer to his figure or description. 
The species comes closest to the Potamobius ( Astacus ) Franklinii , 
described with three other Australian species of the same genus by 
Mr. Gray, in the Appendix to Eyre’s Discoveries in Central Austra¬ 
lia, vol. i. p. 409, t. 3. f. 1. 
The specimen in the British Museum was found by Mr. Strange 
in freshwater creeks, Brisbane Water. Mr. Leicester informs me 
that the species is not uncommon also in the Richmond River. 
Gonodactylus cultrifer, n. sp. 
(Annulosa, PI. XVI. fig. 1, 2.) 
In a Chinese collection, part of which was acquired by the British 
Museum, there occurs a Gonodactylus quite distinct from any of the 
species of this genus which have been described. This species enters 
into the second section of Prof. Milne-Edwards, in which the rostral 
plate is rounded, or scarcely pointed, in front. From the elevated 
compressed process on the seventh abdominal ring, this species may 
be called G. cultrifer. 
The sides of the carapace are very thin and membranaceous. The 
rostral plate is wider than long, but not so wide as in the G. scyl- 
