264 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
Station 4673. Originally established by Giesbrecht upon female 
specimens from Porto Lagunas and reported by Esterly (1905, p. 178) 
from the coast of southern California. Identified by Sars from this 
station off the coast of Peru and from four Monaco stations; present 
in the Siboga plankton. 
METRIDIA BREVICAUDA Giesbrecht 
Metridia brevicauda GiEsBRECHT, Atti Accad. Lincei, Rome, ser. 4, vol. 5, sem. 
2, p. 24, 1889; Fauna und Flora des Golfes von Neapel, monogr. 19, pp. 340, 
346, pl. 33, figs. 5, 10, 11, 14, 21, 26, 32, 1892. 
Stations 35; 36; 2236; 4664; 4756. Giesbrecht’s original specimens 
came from the tropical Pacific and were taken in vertical hauls 1,000 
to 4,000 meters in depth. Those taken at six Scboga stations were also 
captured in vertical hauls from considerable depths, whereas the Alba- 
tross specimens from the first three stations resulted from surface 
tows; the other two tows were vertical ones from 300 and 75 fathoms, 
respectively. It was reported also in the Carnegie plankton. 
METRIDIA CURTICAUDA Giesbrecht 
Metridia curticauda GiesprecHt, Atti Accad. Lincei, Rome, ser. 4, vol. 5, sem. 
2, p. 24, 1889; Fauna und Flora des Golfes von Neapel, monogr. 19, pp. 340, 
346, pl. 32, fig. 7; pl. 33, figs. 4, 15, 33, 1892. 
Stations 4583 ; 4585 ; 4646; 4648; 4652; 4664; 4667; 4671; 4673; 4700; 
4707; 4721; 4722; 4740; 5129. Identified by Sars from 11 of these 
tropical Pacific stations. In the Carnegie plankton it was found only 
in the Atlantic. It has also been reported from the Antarctic Ocean 
by Farran (1929, p. 259) in vertical hauls from considerable depths, 
and from the Indian Ocean by Sewell (1932, p. 248). 
METRIDIA GERLACHEI Giesbrecht 
Metridia gerlachei GirsBrEcHt, Résultats voyage S. Y. Belgica, 1897-99, Rapports 
scientifiques, Expéd. Antarctique Belge, Zool., Copepoden, p. 27, pl. 5, 1902. 
Stations 4; 6; 7;11;18;14;19;21. Established by Giesbrecht upon 
specimens collected during the voyage of the Belgica to the Antarctic 
in 1897 to 1899, and fully described and figured. It does not appear 
in any of the plankton lists here considered, but has been reported else- 
where from the Antarctic by Brady (1918, p. 25), Wolfenden (1911, 
p. 286), and Farran (1929, p. 259). 
METRIDIA LONGA (Lubbock) 
Calanus longus Luspsock, Ann. Mag. Nat. Hist., ser. 2, vol. 14, p. 127, pl. 5, fig. 10, 
1854. 
Stations 1; 10; 31; 34; 41; 42; 48; 49; 50-52; 57; 59; 60; 2195; 
2236; 2859; 2861; 3602; 3799; 4685; 4707; 4709; 4757; 4758; 4760; 
