CUMACEA AND PHYLLOCARIDA—CALM AN. 
9 
PHYLLOCARIDA. 
Nebalia longicornis G. M. Thomson. 
N. longicornis G. M. Thomson, Ann. Mag. Nat. Hist, (5) IV, 1879, p. 418. pi. xix, figs. 
7-9; Thiele, Wiss. Ergebn. D. Tiefsee Exp. “Valdivia" VIII, 1904, p. 9, figs, 
on pi. iv; id. D. Siidpolar Exp. 1901-1903, IX, 1905, p. 66, pi. ii, figs. 14-17; 
id. National Antarctic (“Discovery") Exp. 1901-1904, Nat. Hist. Ill, 1907. 
Leptostraca p. 1, text-figs.; Caiman, Brit. Antarctic (“ Terra Nova ") Exp. Zool. III. 
No. 5, 1917, p. 156. 
Occurrence .— “ Boat Harbour, Commonwealth Bay, 5 fathoms.” 1 9 • 
Remarks .—The specimen is a female carrying eggs, and measures 6-0 mm. in 
length of the lateral wings of the carapace. The rostral plate has the proportion of 
length to breadth as 2-04 : 1; the ocular peduncle has a very prominent and pointed 
sensory tubercle; and the fourth segment of the antennule carries one spine and seven 
or eight setse. The specimen therefore differs little from those already recorded from 
the Ross Sea area (" Discovery ” and “ Terra Nova ") on the one hand and from 
Wilhelm Land (" Gauss ”) on the other, and, with them, would appear to conform to 
Thiele’s definition of his subspecies magellanica. If this subspecies be maintained 
(cf. Caiman, 1 c.), the present specimen may be adduced in evidence for its circumpolar 
distribution and for the comparative uniformity of its characters throughout its wide 
range. 
20218—B 
Vol. 5, Part (i. 
