﻿204 



COPEPODA 



65. Scolecithricella minor Brady. 



(PI. VII fig. 13; PL VIII iigs 10 a— c; text-figs 65 a— c.) 



1883.? Scolecithrix minor ii. sp. Brady, pp. 5S— 59, pi. XVI 1904. Scolecithrix minor Brady. Wolfenden, p iii. 



figs 15—16, pi. XVIII figs 1—5. 1905. — — — Th. Scott, p 223. 



J892. ? — — Brady. Giesbrecht, p. 266. 1905. — — — Farran, p. 35. 



jiiqA.? — - Th. Scott, p. 50. 1906. Scolecithricella minor Brad}-. Pearson, p. 18. 



1898.? — - — Giesbrecht & Schmeil, p. 46. 1907. — — — Koefoed & Damas, p. 397. 



1902.? — Romeri n. sp. Mrazek, pp 513— 515, Taf. 6, 1908. — — — Farran, p. 51. 



text-figs II — 13. j 1908. Scolecithrix minor Brady. V. Bremen, pp. 73 — 74, te.xt-f. 85. 



1903. Scolecithricella minor Brady. G. O. Sars, pp. 55— 56, pis 1913. Scolecithricella minor Brady Stepheusen, pp.314 315. 



XXXVII— XXXVIII. 



Description. f$. Size of specimen from Ingolf St. 40 wa.s 1-52 mm.; anterior divi.sion 1-22 nnn.; 

 urosome 0-3 mm. Sars'.s specimens measured 1-40 mm. 



The (Diti-iiinilnr extend slightly beyond the end of the thorax; the segments i and 2 are in- 

 distinctly .separated, and .so are segments 24 and 25; the .segments 8^9 are almost completely fnsed 

 with 10. The Sp of segment 24 is placed terminally, and extends distinctly beyond the end of segment 

 a b c 25. The niuiitli-li)iihs are completeh- like Sars' figures, and so are 



the natatory legs; the second basipodite of the fourth pair of legs 

 has 3 — 4 rather stiff, marginal setae. In lateral view the third as 

 well as the fourth foot has in the second basipodite an otiter-edge 

 lamina, which terminally is produced into a small tooth, much big- 

 ger in the fourth foot; this lamina has in the third pair, almost in 

 the middle, about 5 rather short and delicate teeth. 



The labnnii and area in front of it is in lateral view very 

 much like Sars' figure PI. XXXVII; the labrum proper and its an- 

 terior j)ortion, which is only slightly prominent, have onl\- a slightly 

 pronounced concavity between them. The avfcrior surface of the labrum is like that of 6'. ovata Icf. PI. 

 VII fig. 14 b); most anteriorly a transverse row of long slender bristles is found, continued laterally and 

 posteriorly into a row of shorter setae; behind this, almost in the middle, a transverse row of shorter 

 setae is found. 



The oral siir/acc of the labrum shows a great similarity to that of S. ofofa (cf. fig. 14 c), but 

 the anterior lateral group is not well separated from the marginal setae, and the following group is 

 not convex outward.s, and is directed towards the second median circular spot. The rudimentary lamina 

 Inbia/is (PI. \^II fig. 13 a) scarcely shows features of great interest. The arrangement of hairs upon 

 and behind the labial lobes .shows great similarity to PI. VII fig. 14 b, but the median and the lateral 

 groups of hairs are fused. 



f-c?. vSize of specimen from Ingolf St. 40 was 1-34 mm.; anterior division 0-99 mm.; urosome 

 0'35 nun. Sar.s' specimens measured 1-40 mm. 



The aiifiiiii/ilar are like Sars' figure, but segments 20csj2i bear only a single .seta not two. 

 The mouth-appendages are very much like those of the female, except the mandibulae which have 

 the third basipodite distinctly longer than wide, the maxillae which have the sensory setae better 

 developed, and the viaxillipech which are shorter and more clumsy. The natatory legs are scarcely 

 different from those of the female. The fifth foot is like Sars' description; the left endopodite 



Text-fig. 65. Scohxithrialla minor Brad\' 



a-b. YcJ— 9 (St Vt. Abdomen X 87 



c. YiJ (vSt. IV). Abdomen X. 57- 



