FRESHWATER AND LAND CRAYFISHES OF AUSTRALIA 
47 
Genus PSEUDENGAEUS gen. nov. 
Carapace higher than broad; smooth or setose. Cervical groove feeble, 
somewhat “V” shaped. 
Rostrum short and broad. Second antennae inserted under the first. 
First abdominal somite without lateral lobes. 
Telson without transverse sutures, entirely calcareous. Sternal keel very 
broad posteriorly; posterior pair of lateral processes appearing double. 
Vas deferens on simple short papillae on coxae of fourth pereopods. 
Stem of podobranchs without a lateral wing-like expansion. Gill formula 
21 -f- epr. 
Genotype Pseudengaeus strictifrons sp. nov. 
Pseudengaeus strictifrons sp. nov. 
(PI. IX, fig. 40.) 
Length of adult specimens, 60 mm. 
Rostrum broad, almost as broad at apex as at base, reaching nearly to 
base of second segment of first antennae ; carinae blunt, reaching to apex. 
Eyes small. First antennae with inner flagella three-fourths as long as 
outer; second antennae slender, reaching to second abdominal segment, 
squames extremely small, not reaching to base of second segment of first 
antennae, broad and rounded, each with a small blunt terminal spine. Inter- 
antennal spine small and slender, semi-pyramidal. Exopod of each third 
maxilliped as a short papilla, one-fourth as long as ischius of maxillipedes. 
Carapace shorter than abdomen, two and one-half times longer than 
broad, one and one-half times higher than broad, branchiostegites with 
numerous minute scattered hairs. Cervical groove and branchio-cardiac 
grooves obsolete, areola fairly broad. 
Sternal keel blunt ; first three pairs of lateral processes small and rounded, 
posterior pair appearing double, upper portion very small and slightly grooved, 
sternum swollen below, partly overhanging fourth pereopods. 
Great chelae: propodus twice as long as broad, entirely smooth, lower 
margin smooth posteriorly and with three smooth carinae anteriorly (one on 
centre of margin and one on each side), cutting edge with eight or nine small 
tubercles, bordered on each side by smooth carina ; dactylus with two smooth 
carinae on upper margin, cutting edge with five small tubercles, bordered on 
each side by a smooth carina. Carpus and merus smooth. 
Telson entirely calcareous, narrowly cone-shaped, without median or 
lateral spines, posterior half divided by a longitudinal median groove; uro- 
pods entirely calcareous, as long as telson, inner rami each divided by a 
longitudinal median carina reaching to posterior margin, without posterior 
or lateral spines ; outer rami each divided by a longitudinal median carina 
reaching transverse suture, four or five small spines on suture. 
Habitat. — Victoria: Portland (H. W. Davey). 
Types in the National Museum, Melbourne. 
The size of the squarne of each second antenna and the shape 
of the rostrum readily distinguish this species. 
