AUSTRALIAN FRESHWATER AND LAND CRAYFISHES 
33 
The type of harretti exhibits a very interesting character 
recorded by Roux, Nobili and Caiman as occurring in males 
of G. quadricarinatus. The propodus of the great chelae bears 
a soft white patch, equal on both chelae, along the lower 
margin near the apex. In the figure (PI. X, fig. 1), this soft 
portion is indicated by the dotted area. 
Clierax davisi sp. nov. 
Plate X, Fig. 3. 
Length of average adult 107 mm. 
Rostrum broad, reaching almost to base of third segment of first antennae, 
apex obtuse, carinae blunt; lateral carinae blunt, punctate, each ending in a 
rounded boss. 
Squame of each second antenna very broad anteriorly, terminal spine short 
and sharp. Interantennal spine short and broad, apex blunt, lateral margin 
serrated. 
Carapace shorter than abdomen, broader than high, densely punctate; 
areola narrow; anterior of carapace and branchiostegites densely minutely 
punctate. 
Telson with a small sharp spine on each lateral margin at posterior third, 
posterior third of telson membranous. Uropods longer than telson; inner 
rami each divided by a longitudinal median carina, ending in a small sharp 
spine at middle, a spine on each outer lateral margin at middle, posterior 
half of each ramus membranous. Outer rami each divided at apical third 
by a transverse suture, numerous small sharp spines along suture; posterior 
two-thirds of each ramus membranous. Lobes at base of uropods with upper 
lobe produced to a small sharp spine. 
Sternal keel slender and sharp, produced to a sharp, backwardly-directed 
spine below great chelae; first two pairs of lateral processes obsolete, third 
pair small and sharp, each with a small round opening on outer lateral surface; 
fourth pair larger, each with a large round opening on upper surface; 
processes between fourth pereopods short and stout. 
Great chelae very stout; propodus two and one-fourth times as long as 
broad, with a few scattered punctures ; upper margin serrated, lower margin 
smooth, posterior margin with a row of small tubercles ; a few small tubercles 
along the cutting edge of propodus. Dactylus stout, punctate, upper margin 
smooth, cutting edge with two or three small tubercles. Carpus with a 
stout, blunt spine, forwardly-directed, on upper margin, two or three small 
spines near posterior margin ; upper margin of merus feebly serrated. 
Habitat. — New South Wales: Dumaresq Creek, Armidale (Consett Davis). 
At first sight this species appears very close to Astacoides 
plebejus Hess (7), which I have not had the opportunity of 
examining. The description and figure of plebejus, however, 
do not agree with davisi in several important characters. 
Although there are many points of similarity, the points of 
difference are such that the species must be separated. For 
example, the telson of plebejus is stated to be longer than the 
uropods, whereas the telson of davisi is shorter than the uro- 
pods ; in addition, Hess gives no indication as to whether the 
