270 A'tmah of the South African Museum. 



1888. Siphonoecetes Stebbing, Challeng. Rep. vol. 29, p. 212. 



1893. Delia Valle, F. u. Fl. Neapel. vol. 20, p. 357. 



1894. G. O. Sars, Crust, Norw. vol. 1, p. 609. 



1904. Walker in Herdman's Ceylou Pearl Fish. Suppl. 



Rep. 17, p. 294. 



1905. Rathbun, Pap. Boston Soc. vol. 7, p. 74. 



1906. ,, Stebbing, I.e. pp. 681, 740 (references, with varia- 



tions in spelling). 

 1910. id. Sci. Res. "Thetis," pt. 12, p. 618. 



SIPHONOECETES ORIENTALIS Walker. 



1904. Si phono ecetes orientalis Walker, I.e. p. 294, pi. 7, fig. 49. 

 1906. Stebbing, I.e. p. 740. 



The South African specimens agree with Walker's description except 

 in the following slight details : 



Eyes poorly developed, composed of 8 lenses, more or less separate 

 and arranged in a circle. 



First antenna extending beyond end of penultimate peduncular 

 joint of 2nd antenna, peduncular joints becoming successively shorter, 

 flagellum subequal to peduncle, 10-11-joiuted. (Walker's specimens 

 had 14 joints ; Stebbing in 1910, I.e. p. 618, remarks on the large 

 number of flagellar joints in this species, a number double that found 

 in any other species.) 



Second antenna as long as body, ultimate and penultimate peduncular 

 joints subequal, the ultimate joint densely setose, flagellum scarcely 

 more than half length of ultimate joint, composed of 1 long and 

 2 short joints, densely setose, with marginal and apical unguiform 

 spines. 



In addition it may be stated that the mouth-parts resemble those 

 figured by Sars (I.e. pi. 218) for S. colletti Boeck, but the inner plate 

 of the first maxilla is quite obsolete. Ramus of 3rd uropod as broad 

 as long. 



Tube constructed of fragments of shell. 



Length . 6 mm. 



Colour: In spirit, whitish. 



Locality : TJmhloti River mouth NW. W., distant 15 miles (Natal). 

 100 fathoms. 4 Nanquas Peak N. W., distant 21 Tidies (East 

 end of Algoa Bay). 63 fathoms. 1 ? in tube ; Beacon East of East 

 London N. i E., distant 10 miles. 52 fathoms. 1 <$ ; Amatikulu 

 River mouth NW. i N., distant 9 miles (Natal). 26 fathoms. 1 $ . 



