AUSTRALIAN MALACOSTEACA. 11 



distally and armed with a row of small denticles. First pair of 

 ambulatory limbs longer than the body — the following pairs, 

 decreasing in length successively. 

 Port Jackson ; Port Philip. 



Family II. MAIIDM. 

 Eyes retractile within the orbits, which are distinctly defined, 

 but often more or less incomplete below, or marked with open 

 fissures in their upper and lower margins. Basal antennal joint 

 always more or less enlarged. 



Sub-Family Maiinw. 

 Carapace usually sub-triangular. Rostrum well developed. 

 Anterior legs in male enlarged ; fingers not excavate at tips. 



G-enus Egeria, Latreille. 

 Carapace broadly triangular, spinose. Eostrum prominent, 

 notched. Orbits with two wide fissures below. Eyes short and 

 thick, visible from above when retracted. Basal antennal joint 

 rather narrow. Anterior legs of male rather small. 



18. Egeria arachnoid.es. 



Cancer arachnoides, Eumph. 



Inachus longipes, Pabr., Supp., p. 358. 



Macropus longipes, Latr., Hist. Nat. Crust., t. vi., p. 111. 



Egeria arachno'ides, Latr., Encycl., pi. celxxxi., fig. 1 ; Milne- 

 Edw., Hist. Nat. Crust., t. i., p. 291. 



Leptopus longipes, Lamarck, Hist, des An. s. vert., t. v., p. 235; 

 Latr. Regne Anim., 2e. ed., t. iv., p. 62. 



Eostrum extremely short, broader than long. Carapace armed 

 above with long spines, of which six are situated on the gastric 

 region, one on the cardiac, one on the intestinal, and two or 

 three on the branchial. Eostrum terminating in two small 

 cornua. Lateral borders of the carapace armed with two or 

 three spines. Orbits with three fissures above and one below. 

 Anterior limbs filiform in both sexes, and armed with a small 

 spine at the extremity of the third joint. Body covered with a 

 brownish pubescence. [M.-F.] 



Darnley Island, Torres Straits (Macleay Museum). A tropical 

 species. 



