FRESHWATER AND LAND CRAYFISHES OF AUSTRALIA 
S3 
Hooked filaments only on the inner side of podobranchiae. Remaining 
branchiae without hooks. 
Female . — Length of average adult specimen, 80 mm. 
Similar to male, but differs in having the carapace broadest in middle, 
posterior only slightly broader than anterior. Abdomen proportionately 
broader and longer than in male. 
Colour . — Anterior of carapace pale brown, anterior edges of rostrum and 
antennal scale orange ; remainder of carapace greyish-brown, more brownish 
towards outer edge, usually mottled with irregular whitish spots on branchio- 
stegites. Abdomen greyish-brown, brown on lateral edges and tail fan. 
Pereopods brownish-white, dark brown at tips ; great chelae bright orange, 
dactylus and propodus greyish-brown, tubercles on inner edge whiter. Abdomi- 
nal swimmerets pale brown. 
Habitat. — Victoria : Thorpdale ; Warragul; Moyarra; Kongwak; Valley 
View (J. Greenwood, 1935) ; Bena; Trafalgar; Korumburra; Warburton; 
Erica. 
Types in National Museum, Melbourne. 
MS. notes and plates illustrating this species were prepared 
many years ago by Professor Sir Frederick McCoy for use 
in the unpublished continuation of his Prodromus of the 
Zoology of Victoria. The name used in his notes is Hemi- 
cirratidus hystrix (gen. and sp. nov.). McCoy’s material was 
subsequently loaned to G. Smith, who described this species 
(with Schuster, 1913) as a species of Engaeus, using McCoy’s 
generic name for the specific name. McCoy’s plates have been 
used in the present paper. 
Austroastacus cymus sp. nov. 
(Text fig. 2.) 
Male .— Length of average adult specimen, 39 mm. 
Rostrum short and broad, reaching to base of second segment of first 
antennae, apex blunt and straight ; carinae feeble, reaching half-way to apex, 
continued by rows of long stout setae. 
Eyes large. First antennae each with two flagella, inner flagellum short 
and slender, one-fifth as long as outer. Second antennae long and slender, 
reaching to cervical groove. Each squame very slender, apex sharp. Exopods 
of third maxillipedes absent. 
Carapace two and one-half times longer than broad, punctate, minutely 
tuberculate on branchiostegites. Cervical groove and branchio-cardiac 
grooves strongly impressed, areola narrow. 
Abdomen two-thirds as long as carapace, very slender, with numerous 
tufts of long stout setae. Telson small, narrowly cone-shaped, without spines ; 
uropods slender, each divided by a longitudinal median carina, outer rami 
each produced to a blunt point, inner rami rounded. Telson and uropods 
covered by numerous tufts of long stout setae. 
Sternal keel raised and blunt between second and third pereopods. 
Great chelae densely punctate, covered by numerous tufts of long stout 
setae; propodus twice as long as broad, upper margin with five or six 
small'tubercles, lower margin smooth, cutting edge with two small tubercles; 
