STUDIES IN AUSTRALIAN CRUSTACEA— McCULLOCH. 311 



The antennular peduncles reach to about the middle of the 

 rostrum, and the shorter flagellum a little way beyond its tip. 

 The flattened basal portion is armed on the outside with a long 

 slender spine, and the joints of the peduncle are provided with 

 brushes of short stiff setae. 



The basal antennal joint has a strong spine on its outer angle. 

 The scaphocerite is long and narrow, the flattened portion being 

 obliquely truncate from the tip. The flagellum is a little shorter 

 than the whole body. 



The mandibles have a short cylindrical molar process and a 

 large toothed cutting edge. The palp is three-jointed, the last 

 joint and distal portion of the second being densely setose. 



The first maxillte are three-branched, the median branch being 

 the longest and with a double row of teeth on its edge. The 

 superior branch is curved and terminates in a short bristle, and 

 the inferior is rounded with setose margins. 



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Tiie second maxilla 1 consist of Ave plates and a slender, twisted, 

 median process. The two outer plates forming the branchial fan 

 are the largest, and the hinder one terminates in extremely long 

 setie. All the other plates have their inner margins setose. 



The first maxillipeds have also two outer fan-plates, which, 

 however, are not setose. A long jointed lash extends from the 

 inner angle of an oblong, setose plate. The median process is 

 jointed to a thickened basal portion, both being setose. 



The basal joint of the second maxilliped supports a small leaf- 

 like plate externally, and a long jointed lash springs from the 

 second. The last joint is large and reflexed upon the others, its 

 distal portion being thickened and set with two opposing clusters 

 of bristles which are more numerous than those on the hinder part 

 of the joint. 



The external maxillipeds are very large and setose, and reach 

 beyond the scaphocerite. The merus has a spine at its distal 

 end, and the last joint bears about six black thorns at its tip. 

 The exopod reaches to the end of the merus. 



The first pair of legs are comparatively short and thick, and 

 reach beyond the antennal peduncle. The upper margin of the 

 merus ends in a strong spine. The fingers are tipped with three 

 or four black points which interlock when closed. There is a 

 patch of short hairs on the lower surface of the palm. 



The second legs are slender and reach beyond the first. Beyond 

 the black thorns on the tips of the fingers they are unarmed. 



