COPHPODA 197 



Y^ (St. V). Size of specimen (male as well as female) from Thor St. 152 was 3-65 mm.; anterior 

 division 3-96 mm. ; urosome 0-69 mm. 



The abdomen has four somites, but in other respects scarcely any difference was observed from 

 the adult females, except by the better developed articulation of the exopodite of the fifth pair of legs 

 in the females (fig. 8e). The fifth pair of legs of the males is clumsy, and most similar to that of 

 Scottocalanus, but has the setae better developed (fig. 8 d PI. VIII). 



Occurrence. The Ingolf Expedition has not gathered this species, but the S/S Thor has brought 

 it home from several localities. 



In Denmark Strait it was found: 



2I / 6 1904 St. 154 6s27 L. N. 27io L.W. 3 f?. 



'9/6 1904 St. 152 65oo L. N. 28io L.W. Yt. 1000 M. Wire 12 f?, i y? (V), 3 yd 1 (V). 



In the Atlantic, south of Iceland: 



V 9 1904 St. 285 6a49 r " N - l8 4 6 L.W. Yt. 500 M. Wire i y? (V). 



'% 1904 St. 1 80 6i34 L. N. i905 I,. W. Yt. 1800 M. Wire i f?, i fd 1 . 



"/ 7 1904 St. 183 6i30 L. N. I7o8 L.W. Yt. 1800 M. Wire 7 f ?, i fd 1 , 2 y? (V), 2 yd 1 (V). 



2 4/ s 1904 St. 104 6247 L. N. i503 L.W. Yt. 1500 M. Wire iof?, i yd 1 (V). 



In the Iceland-Faeroe channel : 



2 9/ 8 1904 St. 165 6ooo L. N. io35 L.W. Yt. 1000 M. Wire i f?. 



22 / 5 1904 St. 99 6i05 L. N. 935 L.W. Yt. 1700 M. Wire 2 f ?, 6 fd 1 . 



'/q 1905 St. 167 5746 L. N. 955 L- W. Yt. 1500 M. Wire 15 f?, i y? (V), i yd 1 (V). 



% 1905 St. 72 5747 L. N. n33 L.W. Yt. 1500 M. Wire 14 f?, 5 y$ (V). 



Distribution. "This species is a noticeable feature of the deep water plankton off the west coast 

 of Ireland" "at depths of from 330 to 1150 fathoms" (Far ran); it has been taken by the Monaco Ex- 

 pedition as well as in the Malay Archipelago. 



Remarks. That this species is identical with Far r a n's Sc. emarginata is scarcely doubtful; Far- 

 ran's specimens were identified by Sars with his A. obtusifrons, which is, however, distinctly bigger 

 and has the fifth feet somewhat different "muni en dedans d'une epine assez forte et allongee, et en 

 autre de 2 petits denticules, l'un apical, 1'autre sortant du bord exterieur". It differs from Scott's de- 

 scription by the wanting delicate spinulation of the posterior surface of the fourth exopodite. 



This species is nearly related to, if not identical with, Wolf enden's 5. aequalis from the South 

 Atlantic (1911, p. 255), as well as with S. inoriiata Esterly (1906, p. 67), but the descriptions are too insuf- 

 ficient for solving the question. 



The species is characterised by the robust shape of the body and the antennulae, which are longer 

 than the body, without Spr. in segment 17, and without setae in segment 10. The Se Re I pes I is 

 comparatively short, and only attains the middle of the following segment, while the Se Ri I pes II is 

 long and pointed. The St. Re III pes II has about 70 partly fused teeth. The inner terminal seta of 

 the anterior surface of Basp. Ill IV is well developed, long and slender. The second basipodite of the 

 third pair of legs has a distinct lateral tooth, but no spinous lamina. 



