FRESHWATER AND LAND CRAYFISHES OF AUSTRALIA 
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Sternal keel of male blunt, high and swollen between second and third 
pereopods, first three pairs of lateral processes obsolete, fourth pair each 
with a large opening on lateral surface ; processes between fourth pereopods 
very short and stout. Sternal keel of female slender and sharp between 
second and third pereopods and the openings on the fourth pair of lateral 
processes much larger than in male. 
Telson entirely calcareous, with a spine on lateral margins at apical third; 
inner rami of uropods each divided by a longitudinal median carina reaching 
almost to posterior margin; outer rami each divided by two longitudinal 
median carinae, transverse suture placed at apical third, several small sharp 
spines along suture. Lobes at base of uropods rounded. 
Pereopods slender. Great chelae short and slender, propodus twice as long 
as broad, upper margin serrated, lower margin smooth; apex sharp and 
incurved, cutting edge usually formed by a row of small tubercles, with one 
larger tubercle about posterior third ; dactylus one-half as long as propodus, 
stout, upper margin smooth, lower margin with a few small tubercles, apex 
sharp and incurved. Upper margins of both carpus and merus serrated. 
Habitat. — Victoria: Gisborne (G. Lyell, 1936). 
Described from 2 males and 1 female. Readily separated 
from G. gracilis by the rostrum and the sternal keel. 
Genus ASTACOPSIS Huxley. 
Proc. Zool. Soc. Lond., 1878, p. 764. 
Astacus Gray, Eyre’s Journ. Exped. Disc. Centrl. Austrl., i (Appen- 
dix), p. 409, 1845; von Martens, Monatsber. Akad. Wiss. Berlin, 
1868, p. 615. 
Astacopsis Smith, Trans. Linn. Soc. Lond., ser. 3, xi, 1908, Zool., 
p. 70; Hasw r ell, Cat. Austrl. Mus., Crust., 1882, p. 175; Smith, 
Proc. Zool. Soc. Lond., 1912, p. 154; Faxon, Froc. U.S. Nat. Mus., 
xx, 1898, p. 669; Faxon, Mem. Mus. Comp. Zool., xl, 8, p. 402, 
1914. 
Carapace with numerous small tubercles and punctures. Rostrum broad, 
carinae blunt, tuberculated. Cervical groove deeply impressed, rounded. 
Abdomen smooth or punctate, lateral margins pointed, usually with spines 
on lateral margins only of first and second somites. First somite with lateral 
lobes large and rounded. Telson and uropods calcareous, except at posterior 
margin ; telson without a transverse suture. 
Second antennae set at the side of the first, squames large. Upper lip long 
and narrow, straight or somewhat concave medianly. 
Sternal keel raised, blunt or moderately sharp. 
Vas deferens on simple short papillae on coxae of fourth pereopods. 
Stems of podobranchs (PI. I, fig. 2) without broad wing-like expansions. 
Gill formula 21 + epr. 
Key to Species of ASTACOPSIS Huxley. 
Squame serrated FRANKLINII (Gray) 
Squame smooth. nr 
Rostrum divided by a longitudinal median carina . . GOULD! sp. nov. 
Rostral carinae produced to sharp points . . . . TRICORNIS sp. nov. 
c 
