FRESHWATER AND LAND CRAYFISHES OF AUSTRALIA 17 
the name and considered the species valid, possibly the Aus- 
tralian representative of A. franklinii. Smith (1912) placed 
nobilis in the synonymy of serratus (Shaw) from the Parra- 
matta River, and described a new species, A. kershawi, from 
Victoria. For reasons given below I consider A. nobilis to be 
a valid species and A. kershawi to be a subspecies of it. 
In the materal examined E. nobilis and E. nobilis s.sp. 
kershawi are represented by eighty individuals ranging in 
length from one and one-half inches to eleven inches from tip 
of rostrum to end of telson. The series includes the three 
large specimens on which Smith founded A. kershawi , and 
eleven small which he called the Local Variety or Small Gipps- 
land Crayfish. 
The smallest in the series have the body smooth or with very 
minute scattered tubercles on the branchiostegites ; on 
examples three inches long the tubercles are more pronounced. 
Specimens five inches long have the tubercles larger, but not 
prominent, agreeing in all details with Dana’s description. 
Examples seven inches long have the tubercles on the carapace 
similar to those of the adults, the row of large tubercles on the 
dorsum of the branchiostegites being prominent; and the 
large tubercle-like ridges on the first four abdominal somites 
are noticeable. The largest specimens have very large 
tubercles on the dorsum of the branchiostegites, thus differing 
from those described by Smith as A. kershawi. 
Specimens of nobilis and kershawi are separated at all 
stages by the size of the telson and uropods, which are larger 
in kershawi , and by the large tubercles on the carapace of 
nobilis which are absent in kershawi, although two specimens 
of kershawi have two or three fairly large tubercles on one 
side only. As the differences are constant, although so slight, 
kershawi is retained as a subspecies of nobilis. 
Euastacus fleckeri (Watson). 
(PL III, fig. 17.) 
Astacopsis fleckeri Watson, Mem. Queensland Mus., x, pt. v, 1935, 
p. 232, pi. xxxiv ; l.c., xi, pt. 1, 1936, p. 52. Flecker, Nth. Queens- 
land Nat., iv, 41, 1936, pp. 18-20. 
Length of largest specimen examined, 210 mm. 
Rostrum slightly longer than broad at base, apex rounded; lateral carinae 
blunt, each with three or four small tubercles; a small tubercle at base of 
each carina. 
Second antennae reaching to base of telson; squame smooth, inner lobe 
broad, terminal spine short and sharp. Interantennal spine long and narrow, 
sharply pointed, margins serrated. 
B 
