174 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
the species has been confined to the Arctic Ocean and the North Sea, 
and this is the first record from the Pacific. The fifth legs of the male 
(fig. 542) show rudiments of endopods. 
Genus CALANOIDES Brady, 1883 
CALANOIDES BREVICORNIS (Lubbock) 
Calanus brevicornis Lusnock, Trans. Ent. Soc. London, new ser., vol. 4, p. 17, 
pl. 3, 1856. 
Stations 5129; 5246; 5820. About 75 specimens, nearly all fully 
grown females, were found in the plankton taken at station 5320 in 
the China Sea off Formosa. It was reported also in the Siboga and 
Monaco lists. The pointed forehead, with its rudiments of a median 
crest and its forward projection in lateral view, furnishes an easy iden- 
tification for the species. It was also noted in these specimens that 
the anterior portion of the head in front of the mouth parts was of a 
different color from that of the body, sometimes whitish, sometimes 
reddish coppery, and was more or less transparent. The fifth legs of 
the male in this species are no longer than the fourth pair and thus 
relatively much shorter than in Brady’s genotype, C. patagoniensis 
(Brady, 1883, p. 75). 
Genus CALANOPIA Dana, 1853 
CALANOPIA AMERICANA F. Dahl 
Calanopia americana F. Dan, Ber. Naturf. Ges. Freiburg, new ser., vol. 8, 
p. 21, pl. 1, figs. 23-26, 1894a. 
Station 5186. Twelve specimens, mostly male, were found at this 
station off Panay Island, Philippine Islands. The species, which 
was founded by Dahl upon specimens of both sexes collected in the 
lower Amazon River, was reported by Scott in the Szboga plankton 
from off the Bermuda Islands, by Farran (1929, p. 274) from off 
Rio de Janeiro, and in the Carnegie plankton from the Caribbean 
region. Although Dahl’s specimens were obtained a considerable dis- 
tance from the ocean, the water from which they were taken showed 
a salinity of 11.8 percent. All the other specimens came from the open 
ocean, and hence this must be listed as an oceanic species capable of 
withstanding considerable reduction in salinity. 
CALANOPIA AURIVILLII Cleve 
Calanopia aurivillii CLeve, Kongl. Svenska Vet.-Akad. Handl., vol. 35, No. 5, p. 
37, pl. 2, figs. 17-23; pl. 3, figs. 1-10, 1901. 
Stations 5175 ; 5176, 5185 ; 5233 ; 5234; 5262; 5308; 5340; 5415; 5530; 
5601; Sabtan Island, Philippine Islands. This species appears in 
the Siboga plankton but in none of the other lists. Cleve’s type speci- 
