52 RECORDS OF THE AUSTRALIAN MUSEUM. 



three, of which the median one is the strongest, and very slightly 

 compressed laterally. Two blunted spines on the cardiac region, 

 which are a little less prominent than the posterior gastric one, 

 and two similar ones on the genital area. Branchial region 

 with three spines, a very large and strong one on the anterior 

 portion which is the largest of all the spines on the carapace ; 

 another big one extending straight outwards from the lateral 

 epibranchial angle, and a third small spine posteriorly. On the 

 sides anterior to and below the epibranchial spine is another 

 small one marking the commencement of a ridge which extends 

 to the anterior margin of the buccal frame. 



There are two spines on the hepatic region, the upper being 

 the larger, and a small one on the pterygostomial. A long spine 

 extends outwards and a little forwards over each orbit, at the 

 base of which is a second smaller one. Post-orbital process with 

 the free border emarginate, and in close contact with the supra- 

 ocular spine. The cornea is surmounted by a spinule. Rostral 

 spines slender and divergent. There are groups of hooked hairs 

 on the frontal, gastric, and lateral branchial regions. The sur- 

 face is^otherwise smooth between the spines. 



Basal antennal joint rather slender, with antero-external angle 

 strongly produced so as to be easily seen from above. 



Ischium of external maxillipeds with a broad median groove, 

 and the inner margins ftnely dentate. Merus triangular, with 

 the antero-external angle produced, and the anterior border with 

 a small lobe exterior to the articulation of the flagellum. 



Chelipeds slender ; the arm and wrist with strong spines on 

 the upper surface and sides. Hand with a spiny tubercle and 

 some small irregularities on the upper margin. Lower finger 

 with a tuft of hairs on its inferior border ; the mobile finger 

 curved and crossing the lower one ; both finely dentate, and 

 meeting along their proximal half. 



Ambulatory legs, with strong spines superiorly ; those on the 

 propodi of the three last pairs changing to elevated groups of 

 tubercles. Dactyli curved, and with one or more spinules on the 

 posterior basal portion. 



Anterior portion of carapace pink, and some bands of the same 

 colour on the legs ; otherwise white except for some fine lines on 

 the posterior portion. 



This species differs from II. oatesii, Henderson, in the spines of 

 the carapace being much larger and longer. The epibranchial 

 spine is not bifid. The basal antennal joint appears to be more 



