REVISION OF THE GENUS EUASTACUS 
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to the carapace, punctate, each with two or three small tubercles near apex. 
An obtuse, punctate carina ending in a very small tubercle at base of each 
Carina, and a large rounded boss posterior-laterally to it. 
Second antennae reaching fourth abdominal segment. Squame smooth, 
inner lobe broad, terminal spine sharp, short and stout. Interantennal spine 
broadly triangular. 
Carapace less than twice as long as broad, broader than high, slightly 
shorter than abdomen. Entire carapace densely punctate. Branchiostegites 
sparsely studded with small tubercles, with or without large flattened tubercles 
along the dorsum of each branchiostegite, one small blunt spine anteriorly 
on each branchiostegite below the cervical suture. 
First abdominal segment with a short sharp spine on each lateral lobe. 
Second segment with two slender sharp spines at each lateral margin : a 
broad blunt spine above the lateral spines, and a rounded boss above these 
spines. Third and fourth sergments each with a long slender sharp spine 
at each lateral margin : a long broad blunt spine above the lateral spine, 
and a broad rounded boss above these spines, smaller on fourth segment. 
Fifth segment with a long slender sharp spine at each lateral margin, two 
short broad blunt spines above the lateral spines. Sixth segment with a 
small sharp spine near each lateral margin, and a very small blunt spine 
above it. 
Telson very long and broad, with a very short sharp spine on each 
lateral margin at the feeble transverse suture, several short blunt spines on 
upper surface. Uropods as long as telson, inner rami each with three or 
four very short sharp spines along the outer lateral margin, median carina 
almost obsolete, ending in a very small blunt spine near the posterior 
margin, two or three small blunt spines marking the carina ; outer rami each 
with three or four small blunt spines along the outer lateral margin, trans- 
verse suture feeble serrated. Lobes at base of uropods rounded. 
Sternal keel moderately sharp ; lateral processes large and moderately 
sharp, processes between third pereopods verv large and deeply grooved ; 
processes between fourth pereopods long and slender. 
Great chelae long and stout, propodus more than twice as long as broad, 
upper margin with four sharp spines, lower margin with two rows of short 
spines, apex sharp, cutting edge with two large and several small blunt 
spines in a row on upper surface near the cutting edge, several small 
tubercles in a group on upper surface below the base of dactylus. Dactylus 
long and stout, one or two small spines on upper margin near base, and 
two or three near the apex, apex sharp, several large tubercles along cutting 
edge, four or five small spines in a row on upper surface above the cutting 
edge. Carpus with two long sharp spines on upper margin, upper surface 
deeply grooved. Merus with one large and three small spines along the 
upper margin. 
Pereopods armed with numerous short sharp spines. 
Habitat. — Victoria: Glenelg River (type locality) (H. Pritchard): 
Crawford River (J. McEachern) ; Upper reaches of Wannon River (H. 
Finlayson). 
The two rows of spines on each side of the abdominal 
segments, in addition to the large rounded boss, at once 
separate this species from others of the genus. Although 
somewhat resembling E. nohilis, it is separated by the arma- 
