226 Annul* <>/ the South African Museum. 



GEN. PAKOKCHESTIA Stebbing. 



1399. Parorchestia Stebbing, Tr. Linn. Soc. Lond. ser. 2, vol. 7, pt. 8, 



p. 402. 



1906. id. Das Tierreich, 21, pp. -557, 735. 



1909. Clultou, Subaut. Is. N.Z. p. 636. 



PARORCHESTIA TENTHS (Dana). 

 1853 and 55. Orchestia tennis Dana, U.S. Ex|J. Exp. vol. 13, 2, p. 872, 



pi. 59, fig. 1. 

 1862. Bate, Cat. Arnpliip. Brit. Mus. p. 29, 



pi. 4, fig. 10. 

 1881. sijlvicola Thomson, Tr. N.Z. Inst. vol. 13, p. 212, 



pi.. 7, fig. 4 (non Dana). 



1884. Allorchestes recens id. ibid. vol. 16, p. 235, pi. 13, figs. 2-5. 

 1893. Orchestia gammarellus (part) Delia Valle, F. u. Fl, Neapel, 



vol. 20, p. 501. 



1899. Parorchestia tennis Stebbing, Tr. Linn. Soc. Lond. I.e. p. 402. 

 1906. id. I.e. p. 557. 



1909. Chilton, Subaut. Isl. N.Z. p. 642. 



Body fairly compressed. Eyes rather large, equal to half the upper 

 margin of head, circular, almost meeting on the top of the head. Side- 

 plate 1 smaller than and partly concealed by 2, side-plates 2-4 of 

 same depth as their segments, with a posterior point above which hind 

 margin is excavate, inferior margins of 1-4 minutely spinulose, 5 nearly 

 but not quite as deep as 4. Postero-inferior angle of 1st pleoii 

 segment quadrate with a very small point, of 2nd and 3rd quadrate, 

 somewhat produced in an acute point, hind margin concave above the 

 point, perfectly smooth. 



Telsoii rather short, triangular, a very faint apical notch, the only 

 setae present are 3 on each apex set just within the margin. 



First antenna not quite reaching apex of peduncle of 2nd antenna, 

 1st, 2nd and 3rd joints subequal, fiagellum equal to peduncle, 7-, 

 ? 4-joiuted. 



Second antenna -| length of body, ultimate joint longer than penulti- 

 mate, fiagellum equal to peduncle, <$ 14-, $ 7-jointed. 



First gnathopod <$ exactly resembling Thomson's figure of his 

 Allorchestes recens (= Parorchestia tennis (Dana)). 



Second gnathopod J also in close agreement with that of P. tennis. 

 The defining angle is a little more prominent than in Thomson's 

 figure,- but is not at all tooth-like, and carries one fairly stout spine. 



First and second guathopods ? also resembling Thomson's figui-es 



