18 
REVISION OF THE GENUS EUASTACUS 
Carina. A small blunt spine at base of each carina, with a small tubercle 
posterior-late rally to it. 
Second antennae reaching to third abdominal segment. Squame smooth, 
sharply pointed, inner lobe broad. Interantennal spine long and slenderly 
triangular. 
Carapace more than twice as long as broad, broader than high, much 
shorter than the abdomen. Branchiostegites and anterior of carapace studded 
with numerous small tubercles; areola and dorsum of carapace densely 
punctate. Entire carapace densely hirsute. 
Abdomen hirsute. First segment without spines on lateral lobes. Second 
segment with small sharp spines along each lateral margin. Third, fourth 
and fifth segments each with a small sharp spine at each lateral margin. 
There are no other spines or tubercles on the abdomen. Entire abdomen 
densely hirsute. 
Telson and uropods each densely hirsute. 
Sternal keel broad and blunt; first pair of lateral processes small and 
sharp, second pair larger, blunt; posterior pair very large and blunt, deeply 
grooved ; processes between fourth pereopods long and stout. 
Great chelae stout; propodus three times as long as broad, apex sharp, 
upper margin with five or six blunt spines, lower margin with two rows of 
small tubercles, cutting edge with one large and three or four small tubercles, 
upper surface minutely tuberculate. Dactylus long and slender, apex sharp, 
upper margin with a smooth carina, one or two small tubercles near base, 
cutting edge with several small tubercles. Carpus with four sharp spines 
on upper margin, upper surface deeply grooved. Merus with several small 
sharp spines along upper margin. The whole of the great chelae and all the 
pereopods densely hirsute. 
Habitat. — New South Wales : Belmore Falls Creek, Kangaroo River (type 
locality), in streams above the falls (Melbourne Ward); Sublime Point, 
Bulli Pass (Consett Davis). 
Types in the Australian Museum, Sydney. 
Described from a large series comprising two paratypes, 
received on loan from the Australian Museum, and fresh 
material from Messrs. Ward and Davis. The large number 
of specimens examined has shown the species to warrant 
specific rank. 
The specimen from Bulli was collected in a burrow some 
three feet below the soil surface, near Sublime Point, about 
1,300 ft. above sea-level. 
Euastacus suttoni sp. nov. 
Plate V. 
Length of largest specimen 200 mm. 
Rostrum very broad, reaching base of third segment of second antennae, 
apex short and blunt ; lateral carinae obtuse, carried well back on to carapace. 
An obtuse punctate carina ending in a small tubercle at base of each carina, 
and a large rounded boss posterior-laterally to it. 
Second antennae short, reaching second abdominal segment. Squame 
smooth, inner lobe broad, terminal spine short and sharp. Interantennal 
spine long and slender, lateral margins serrated. 
