14 Annals of the South African Museum. 



in which the marginal tooth is inconspicuous, being close to 

 the apex of the branch. 



Locality. Bluff Lighthouse, SW. 5 miles ; depth 15 

 fathoms (Durban). A 1190. 



PENAEUS PULCHRICAUDATUS, n. sp. 

 Plate LXVII. 



The small slender specimen for which this new species is insti- 

 tuted after long preservation in spirit was still beautifully variegated 

 with lines of little blue spots. The nearest ally appears to be 

 Penaeus japonicus, Bate, with which the carapace closely agrees. 

 There are 9 dorsal spines, the hindmost remote from the rest, of 

 which 2 are behind the orbit and the foremost rather remote from 

 the apex and slightly in advance of the single ventral tooth. 

 Between the fourth peraeopods there is a long adpressed spine-like 

 ventral process, and a similar but shorter one between the fifth 

 peraeopods. The sixth pleon segment is longer than the telson, 

 sharply carinate, ending posteriorly in a medio-dorsal tooth, and 

 having a smaller tooth at each postero-lateral angle. The telson 

 is narrowly lanceolate, behind the centre having eight pairs of 

 marginal spines, four pairs successively larger at successively 

 smaller intervals, followed by a series of four microscopical pairs, all 

 outflanked by the last of the large pairs and placed on the converg- 

 ing sides of the apical tongue, which then becomes nearly parallel- 

 sided, with a slight bulge before running out to a point. 



The eyes are large, dark, and bean-shaped, with a narrow ped- 

 uncle. The two pairs of antennae are like those of P. japonicus, with 

 which the mouth organs show much agreement, but in place of the 

 very long terminal joint which Bate attributes to the palp of the first 

 maxillae there are here two short joints, together shorter than Bate's 

 long single joint. In the second maxillae the lowest lobe is notable 

 for the paucity of setae ; on the apical lobe there are 3 very short 

 spines, and below them on the inner margin a group of denticles. 

 In the second maxillipeds the terminal joint is shorter instead of 

 longer than the preceding joint, and in both second and third 

 maxillipeds the exopod is much less strongly developed than it 

 appears in the figures of P. japonicus. This, however, may be 

 referable to the age of the specimen. 



In the first, second, and third peraeopods the fingers of the chela 

 are longer than the palm, and the confronting denticulation is more 

 or less limited in its extent. In the first pair groups of little serrate 



