Crustacean Fauna <>/ South Africa. 243 



PHOTIS LONGICAUDATA (Bate & Westw.). 



(Plate XXVIII. Fig. 26.) 

 1862. Eini-'lailii* l<iii>il<;indatus Bate & Westwood, Brit. Sess. Crust. 



vol. 1, p. 412, fig. 



1893. Photis reinhardi (part) Delia Valle, F. u. Fl. Neapel. vol. 20, 



p. 395, pi. 3, fig. 3, pi. 10, figs. 1-19. 



1894. longicaudata G. 0. Sars, Crust Norw. vol. 1, p. 571, 



pi. 203, fig. 1. 

 1904. Walker in Herdmau's Ceylon Pearl Fish. 



Suppl. Kep. 17, p. 286, pi. 6, fig. 43. 



1906. ,, Stebbing, Das Tierreich, 21, p. 608 



(synonymy) . 



1909. Walker, Tr. Linn. Soc. Loud. vol. 12, pt, 4, 



p. 339. 



1910. ,, Chevreux, Mem. Soc. 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, small 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 1st joint of 1st antenna ; 

 eyes large, round-oval. Side-plate 1 expanded below, longer than 

 deep. Postei-o- inferior angle of 3rd pleon segment rounded. Telson 

 small, short, apically rounded, without setae. 



First antenna, 1st 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, 



