182 
“TERRA NOVA” EXPEDITION. 
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8. Conchoecia antipoda, Muller. 
ConcJioecia antipoda, Muller, 1906a, p. 110, pi. XXVI, figs. 5-16 ; id. 1912, p. 87. 
Stations 178, 270, 276, 282, 285, 346 (Antarctic). Surface to one thousand seven 
hundred and fifty metres. 
9, Conchoecia belgicae, Muller. (Text-fig. 4.) 
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J -> Conchoecia belgicae, Muller, 1906c, p. 4, figs. 1—11 ; id. 1912, p. 92. 
pSC'1 iTl Conchoecia innoviinata, Brady, 1907, p. 1, pi. II, figs. 7-14. 
Stations 112, 136 (North of New Zealand). Surface to ten metres. Stations 172, 
178, 235, 270, 317, 323, 343-6, 350-352 (Antarctic). Surface to six hundred metres. 
Certainly the most numerous species in the nettings of the Expedition, occurring 
in more gatherings than any other Ostracod, and in many cases forming the hulk of the 
plankton and giving it a characteristic appearance. 
The percentage of young in these swarms is low. 
Thus in No. 317 fourteen per cent, were larvae, in 
No. 112 only twelve per cent. 
Two larval stages may be distinguished. 
C 
Fig. 4.— Conchoecia belgicae. A, Male ; 
B, Male, Stage II ; C, Male, 
Stage III ; Right valves, X 25. 
Stage II. % mean length, 2 ’08 nun. (Fig. 4b.) 
Rostrum relatively slightly larger and shoulder- 
ridge less prominent than in adult. Anterior 
and posterior margins more evenly curved. First 
antennae of £ type, principal bristle slightly hairy 
in its middle one-third. 
Frontal oman, head not clearly marked off from 
stem, slightly hairy below, club-shaped with acute 
point bent slightly downwards. 
Stage III. $ mean length, 1 • 36 mm. (Fig. 4c.) 
Shell very similar to that of Stage II. Left 
asymmetrical gland with prominent mouth. First antennae, sense-tubes about half 
as long as principal bristle. 
10. Conchoecia bispinosa, Claus. 
JQZJf.S-Z IlS-Ilh Conchoecia bispinosa, Claus, 1890, p. 10 ; id. 1891, p. 59, pi. V, figs. 1-10, pi.VI, fig. 1, pi. VIII, 
. / / \ figs. 7, 8; Muller, 1906a, p. 90, pi. XVIII, figs. 12-19 ; id. 1912, p. 79. 
/ < s Conchoecia secernenda, Vavra, 1906, p. 59, pi. VI, figs. 121-127. 
Conchoecia miilleri, Juday,1906, p. 24, pi. V, figs. 5-7, pi. VI, figs. 1—5. 
Stations 92, 107 (North of New Zealand). Surface. Stations 235, 238 (South of 
New Zealand). Ten to thirty metres. 
* In a copy of this paper received from the author by Dr. W. T. Caiman the name, C. miilleri, has 
been altered in manuscript to C. striola, Muller. 
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