STUDIES IN AUSTRALIAN CRUSTACEA— McCULLOCH. 55 



and abdomen pitted \ the other uuder-surfaces smooth. Orbits 

 with two sutures above and another below ; the lower borders 

 minutely granular internally. 



Eyes small, with a small sub-apical tubercle. 



External maxillipeds flat and a little pitted, with a shallow 

 somewhat oblique groove on the ischium. Ischium much longer 

 than broad, and about twice as long as the merus. Outer angle 

 of merus very slightly produced, flagellum attached to antero- 

 internal angle. Exopod long and broad. 



Chelipeds equal (?) (left cheliped missing in the young specimen, 

 but in a specimen twice as big, and others bigger, left and right 

 are equal in size). Right cheliped a little pitted and roughened 

 exteriorly, smooth internally. Arm trigonal, with a few tubercles 

 on the upper margin distally. Wrist with an internal tubercle, 

 and another faint one below it. The upper border of the hand 

 forms a crest, and the lower is carinate, more especially anteriorly. 

 Fingers each with four stout teeth on their inner borders, which 

 meet along their whole length and cross at the tips ; mobile 

 finger also with a crest. 



Ambulatory legs a little punctate, and with indications of 

 crests on the anterior and posterior margins of the joints. 

 Dactyli dilated behind and with a curved ridge on either side. 



Colour whitish, with Light red patches. Length, 6 - 2 mm.; 

 breadth, S mm. 



For purposes of comparison with the next species a young 

 specimen was selected for the basis of the above description. 



•The adult specimens I have examined, including a co-type, 

 differ from the above description in having the front relatively 

 narrower, it being about 2 - 6 in the breadth of the carapace, 

 owing to the expansion of the branchial regions ; in Fulton and 

 Grant's figure the front is shown as very much too wide. The 

 inter-regional grooves are more distinct, aud the surface of the 

 carapace, abdomen, chelipeds and legs is almost quite smooth, the 

 punctations being nearly obsolete. The crests on the chelipeds 

 and legs are absent, and the dactyli are long and cylindrical. 



Colour, light brick-red, with some white marbling on the 

 hinder part of the carapace. 



Fulton and Grant supposed this species to be identical with 

 Cycloxanthus punctatus, Haswell, and for reasons given proposed 

 the new name haswelli for it. This supposition was incorrect, 

 but as they distinctly applied the name to the Victorian species, 



