2 AUSTRALIAN MALACOSTRACA. 



Family I. IRACIIIDjE. 

 Eyes non-retractile or retractile against the sides of the 

 carapace. No defined orbits, but often a well marked prae-ocular 

 and post-ocular spiue. Basal joint of antenna? usually slender, 

 sometimes moderately enlarged. \_Miers.~] 



Sub-Family LeptopodUnce. 



Eyes slender, non-retractile and laterally projecting. Prre- 

 ocular and post-ocular spines minute or wanting. Basal antennal 

 joint very slender throughout its length. [J/.] 



Genus Stenorhtnchtjs, Lamarck. 



Eostrum more or less elongated, of two slender, contiguous, 

 spiniform cornua. 



1. Stenorhynchus curvirostris. 



Stenorhynchus curvirostris, A. Milne-Edwards, Journal des 

 Museum Grodeffroy, Band i., Heft iv., p. 75. 



Carapace narrow in front, dilated behind ; two spines in the 

 middle line ; one on the gastric region, the other on the cardiac ; 

 another spine on the branchial region ; lateral borders of the 

 branchial region dilated into a large tuberosity, in front of which 

 are a few spines of which the most acute occupy the hepatic 

 regions. Front broad, flattened and formed of two very short 

 sharp and triangular teeth, separated on the middle line by a 

 shallow fissure ; at their base on each side a sub-orbital 

 tooth. [A. M.-F.] 



Bass' Straits. 



2. Stenorhynchus fissifrons. A.M. 

 Stenorhynchus fissifrons, Haswell, Proc. Linn. Soc. N.S.AV., 



Vol. iii., p. 409, and Vol. iv., p. 432. 



Gastric region of the carapace with a short blunt spine and 

 two tubercles in the form of a triangle, with the apex directed 

 backwards and formed by the spine. Eostral spines short, 

 acute ; frontal furrow extending as far back as the posterior 

 angles of the orbits. 



Port Jackson. Occurs also in New Zealand. 



