154 



COPEPODA 



to the same species (they were gathered in the same sample at 84 L,. N., "the tow-net having been 

 lowered to 130 metres"), Ch. parvispina and spectabilis are scarcely identical, as Sars' male possessed 

 a rounded lateral corner and a distinctly more elongate third segment in the exopodite of the fifth foot. 



Valdiviella Steuer. 



1883? Euchsete pars Brady. 



1904. Valdiviella 11. gen. Steuer. 



1905. Steuer. G. O. Sars. 



1908. Valdiviella Steuer. Farran. 



1909. A. Scott 

 1911. Wolfendeu. 



According to G. O. Sars and Wolfenden this genus is nearly related to Euchate; the 

 structure of the maxillulae and the maxillae bear out this opinion. With some right Steuer suggests 

 that it ought to be referred to the Aetideidae; the structure of the legs, of the labrum, the labium and 

 the antennulae support this view. On account of the two egg-balls and the distinctly three-segmented basi- 

 podite of the maxillulae, I think that the form is a rather primitive one. V. oligarthra Steuer, insignis 

 Farran and brevicornis G. O. Sars, as well as the curious V. minor Wolf, are certainly good species 

 A. Scott has referred a young male, probably belonging to this genus, to Brady's Euc. gigas ; he is 

 certainly wrong; his specimens are from the Malayan Seas and Brady's from the west coast of South- 

 America; the length of the former was 8 mm. and of the latter 5-25 mm. The lateral corner of Brady's 

 specimens had a long lateral spine, that of Scott's species a short triangular one. 



45. Valdiviella insignis Farran. 

 (PI. VI figs 2 a e ; text-figs 44 a d). 



1908. Valdiviella insignis n. sp. Farran, pp. 45 46, pi. Ill figs 1911. Valdiviella insignis Farran. Wolfenden, pp. 247-248, 



1-6, pi. IV fig. 5. 



Taf. XXXX figs 6-7. 



Description. f$. Size of specimen from St. 183 was 1175 mm. ; anterior division 8-5 mm.; urosome 

 3-25 mm. Farran's specimens measured 11-5 12-0 mm. 



The anterior division, which has distinctly rounded lateral corners without tuft of hairs, is 

 rather clumsy; the rostrum consists of two short, well separated spines; the first thoracic somite is com- 

 pletely fused with the head, and the fourth with the fifth. The anterior division is 2-5 as long as the 

 abdomen, which has the proportional length as 45, 35, 25, n, n. The genital somite is almost sym- 

 metrical and only slightly produced below; the vulva is seen laterally as an incision between an 

 anterior and posterior process. The somites III IV have ventrally a tuft of long hairs; the posterior 

 margins, not only of the III IV tergites but also of the I <v> II, are denticulated. The furcal rami and 

 the setae are scarcely different from Farran's description; the appendicular seta seems to be longer 

 than figured by Wolfenden. 



The antennulae, which extend a little beyond the end of the thorax, have not the obtuse angle 

 between the proximal and distal portion, which is found in Euch&te; the segments 8^9 and 24^25 

 are almost completely fused. The ringed terminal setae are less powerful than those found in Euchate; 

 no proximal setae were found in segments 10, n and 20 23; rather short triangularly pointed "^sthe- 

 tasken" were observed in segments 5, 9, 12, 14 and 19. The measurements are even in minor details 



