Crustacean Fauna of South Africa. 243 
PHOTIS LONGICAUDATA (Bate & Westw.). 
(Plate XXVIII. Fig. 26.) 
1862. Hiscladus longicaudatus Bate & Westwood, Brit. Sess. Crust 
vol. 1, p. 412, fig. 
1893. Photis reinhardi (part) Della Valle, F. a. FI. Neapel. vol. 20, 
p- 395, pl. 3, fig. 3, pl. 10, figs. 1-19. 
1894. » longicaudata G. O. Sars, Crust Norw. VOLES euro 
pl. 203, fig. 1. 
1904. ss i Walker in Herdman’s Ceylon Pearl Fish. 
Suppl. Rep. 17, p. 286, pl. 6, fig. 43. 
1906. i i Stebbing, Das Tierreich, 21, p. 608 
(synonymy). 
1909. - Bs Walker, Tr. Linn. Soc. Lond. vol. 12, pt. 4, 
p. 339. 
USO As Chevreux, Mém. Soe. Zool. Fr. vol. 23, 
p. 249. 
The South African form is very close to that from Ceylon, the chief 
difference being in the hand of the 2nd gnathopod of the ¢ ; the 
tooth near the hinge, which is so prominent in Walker's figure of the 
Ceylon specimens, is here absent; but on the contrary the small tooth 
at the apex of the excavation, smali in Walker’s figure, is here a large 
nodular projection. 
For comparison, the following description of the present specimens 
is given. 
Ocular lobes reaching to the middle of the Ist joint of Ist antenna ; 
eyes large, round-oval. Side-plate 1 expanded below, longer than 
deep. Postero-inferior angle of 3rd pleon segment rounded. Telson 
small, short, apically rounded, without setae. 
First antenna, Ist joint stout, shorter than 2nd and subequal to 3rd, 
flagellum equal to peduncle, 9-jointed. 
Second antenna, ultimate joint longer than penultimate, flagellum a 
little longer than ultimate and penultimate joints together, 10-jointed. 
Neither antenna densely setose. 
Mandible, 2nd joint of palp concave on inner margin. 
First maxilla, inner plate with 1 seta, outer plate with 9 spines, 
palp with 5 spine-teeth. 
Maxilliped, inner plate with 3 apical teeth, inner margin of outer 
plate with 5 ovate and 3 elongate spines (the transition gradual). 
First gnathopod, 6th joint a trifle longer that 5th (measured along 
upper margin) but scarcely as wide, palm very oblique and not defined, 
