202 Annals of the South African Museum. 



Second antenna 3 > a little longer than first antenna, 3rd and 4th 

 joints longest, setose, flagellum 7-jointed, sparsely setose. 



Mandibles $ , arcuate, inner margin below the smooth upturned 

 apex with about 5 blunt teeth, a well-marked notch on outer margin. 



Maxillipeds $ , 2nd joint not produced distally, 4th joint of 

 palp not incurved, outer margin with stiff setae. 



Gnathopod 3 > 1st joint tapering, inner margin setose, 2nd joint 

 small with apical tuft of setae. 



Peraeopods all similar, rather stout, 4th and 5th joints expanded 

 on front margin, 4th joint more so than the 5th ; 3rd, 4th, and 5th 

 joints have prominent tubercles on posterior margin, 6th joint as 

 long as 3rd, with 2 groups of 3 blunt tubercles and 1 blunt spine on 

 inner margin, 7th joint half length of 6th with minute tooth at the 

 base of the prominent unguis. 



Pleopods, rami longer than peduncle, rami of first pleopods 

 narrower than the others, all tipped with long setae. 



Uropods, outer ramus a little shorter and narrower than inner, 

 both with long setae. 



In the larva the mandibles are rather pointed, inner margin 

 straight with the denticulations increasing in size proximally. 



First and second maxillae are simple curved appendages, the first 

 shorter than the second. 



Maxillipeds well developed, half-way along inner margin of the 

 large basal joint is a narrow blunt lobe, and at the apex two small 

 lobes, the outer blunt and tipped with setae, the inner pointed, with 

 three minute teeth on its inner margin. 



Gnathopod short, apparently only 3-jointed with a strong falciform 

 unguis ; the 1st, 2nd, and 3rd joints are denticulated on inner 

 margin, the points of the denticulations facing proximally, those on 

 2nd joint sharper and more distinct than the others. 



Length : 3 4 mm. ; larva 3 - 5 mm. 



Colour : Yellowish grey, with darker rnottlings along margins of 

 head and on dorsal parts of peraeon and pleon. 



Locality : St. James, False Bay. 29/4/12. (Coll. K.H.B.) One 3 

 and 2 larvae on Holothurians in rock-pools, low tide. (S.A.M. 

 No. A2553.) 



Mr. Stebbing has favoured me with the following note on the 

 affinities of this species : 



" Anceus forficularius, Eisso, 1816, Anceus rapax, Milne Edwards, 

 3840, and Anceus vorax, Lucas, 1849, all make a near approach to 

 the present form, but offer more or less trustworthy marks of 

 distinction." 



