126 Annals of the South African Museum. 



Locality: Cape Point NE. by E., distant 36 miles. 650 fathoms. 

 1 (? juv.) ; Umhloti River mouth N. by W. | W., distant 8 miles 

 (Natal). 40 fathoms. 3 (? juv.). s.s. " Pieter Faure." 15/7/03 

 and 18/12/00. (S.A.M. Nos. A2845 and A2846). 



Geogr. Distribution : Cape Fimsterre, 1125 fathoms (Stebbing) ; 

 Table Mt. E. distant 41 miles, 245 fathoms (Stebbiug). 



GEN. URISTES Dana. 



1849. Uristes Dana, Amer. J. Sci. ser. 2, vol. 8, p. 136. 

 1852. ,. id. Pr. Amer. Ac. vol. 12, p. 209. 

 1862. Bate, Cat. Amph. Brit. Mus. p. 89. 



1888. Stebbiug, Challeng. Rep. vol. 29, p. 263. 



1889. id. Ann. Mag. Nat. Hist, ser. 7, vol. 4, p. 211. 

 1891. Pseudotryplwsa G-. O. Sars, Crust. Norw. vol. 1, p. 83. 

 1893. Tryphosel/a (part) Bonnier, Bull. Sci. Fr. Belg. vol. 24, p. 

 1893. Uristes Delia Valle, F. Fl. Neapel. vol. 20, p. 836. 



1906. Stebbing, Das Tierreich 21, p. 63. 



UKISTES NATALENSIS n. sp. 



Head equal to 3rd peraeon segment, autero-lateral angles acute, 

 eyes indistinct. 



Peraeou segments 1 and 2 subequal, shorter than 3rd. Side-plate 

 1 widening slightly distally, autero-inferior angle broadly rounded, 

 postero-inferior angle quadrate, a small indent carrying a seta on 

 inferior margin at posterior corner, side-plates 2^ increasing gradu- 

 ally in length, overlapping, the inferior margin of 2nd and 3rd like- 

 wise with an indent and seta at posterior corner, side-plate 5 broader 

 than deep, bilobed, anterior lobe deeper than posterior, 6th and 7th 

 side-plates quadrate, subequal, 6th scarcely bilobed. 



Pleon well developed with large pleura, postero-inferior angle of 

 1st rounded, of 2nd quadrate with a small point, of 3rd quadrate with 

 small squarely-upturned apex ; 4th pleon segment somewhat depressed 

 basally, apically neither carinate nor produced. 



Telson oblong with deep and rather wide cleft, apices acute with 

 1 spine and 3-4 small setules, side margin with 1 spine near base and 

 another just beyond the middle. 



First antenna equal to head plus first 2 or 3 peraeon segments, 1st 

 joint twice length of 2nd and 3rd together, 3rd very short, flagellum 

 twice length of peduncle, 20-joiuted, calceoliferous, 1st joint very large 

 and equal to 1st peduncular joint, with ca. 18 transverse rows of setae, 

 accessory flagellum 6-jointed, 1st equal to 2nd and 3rd together. 



