JC4. 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 spcctabilis 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. 



Valdlviella vStener. 



18S3? Euchrete pars Brady. 



1904, Valdiviella n. gen. Steuer. 



1905. — Steuer. G. O. Sars. 



1908. Valdiviella Steuer. Farran. 



1909. — — A. Scott 

 191 1. — — Wolfenden. 



According to G. O. Sars and Wolfenden this genus is nearly related to Ejic/icrfc; 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 AcHdeidae; the structure of the legs, of the labrum, the labiimi 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. oligartlira Steuer, insignis 

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

 A. Scott has referred a young male, probably belonging to this genus, to Brady's Euc. gtgas; 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. Farrau, pp. 45— 46, pi. Ill figs 1911. Valdiviella insignis Farran. Wolfenden, pp. 247 — 248, 



1—6, pi. IV fig. 5. I Taf. XXXX figs 6-7. 



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

 3-35 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, 11, 11. 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 oj H, 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 Ettchcefe^ the segments 80^9 and 24'>5 25 

 are almost completely fused. The ringed terminal setae are less powerful than those found in Euch(Ete\ 

 no proximal setae were found in segments 10, 11 and 20 — 23; rather short triangularly pointed ".i55sthe- 

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



