190 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
Stations 27; 8799; 4574; 4671; 4681; 4685; 4687; 4740; 5185; 5227; 
5231. This species was reported as rather abundant at 56 Monaco 
stations and at 16 Siboga stations from both the Atlantic and Pacific 
Oceans. It is also found in the warmer tropical waters as well as 
the cooler temperate depths, in surface tows and in vertical hauls. 
At these Albatross stations, however, the number of specimens was 
very limited, sometimes only a single one. 
Genus CLAUSOCALANUS Giesbrecht, 1888 
CLAUSOCALANUS ARCUICORNIS (Dana) 
Calanus arcuicornis Dana, Proc. Amer. Acad. Arts and Sci., vol. 2, p. 12, 1849; 
United States Exploring Expedition, 1888-1842 (Wilkes), vol. 14, pt. 2, 
Crustacea, p. 1056, 1853; pl. 72, fig. 7 a, b, 1855. 
Stations 2; 4; 5;°8; 9; 193 20; 22; 23; 95: 96; 29:36:39. 45. 49; 
53; 57; 60; 62; 63; 65; 66; 75; 77; 79; 81; 82; 236; 3799; 3901; 4574; 
4664; 4673; 4707; 4889; 5129; 5208; 5231; 5262; 5263; 5320; 5340; 
5396; 5424; 5437; 5651; Fiji Islands. At these Albatross stations the 
number of specimens was comparatively limited, in the Siboga plank- 
ton they were moderately abundant, in the Monaco plankton very 
abundant, and in the Carnegie plankton taken at nearly every station. 
Dana’s types came from the southern Pacific southwest of the 
Kermadec Islands. 
CLAUSOCALANUS FURCATUS (Brady) 
Drepanopus furcatus Brapy, Voyage of H. M. S. Challenger, Zool., vol. 8, pt. 23, 
Copepoda, p. 77, pl. 4, figs. 1, 2; pl. 24, figs. 12-15, 1883. 
Stations 9; 12; 19; 23; 26; 30; 82; 35; 41; 47; 52; 64; 65; 70; 713 
75; 3799; 4574; 5233; 5340; 5899. Present in all the plankton lists 
except the Wilkes, but not so abundant as the preceding species. 
Genus CLYTEMNESTRA Dana, 1847 
CLYTEMNESTRA ROSTRATA (Brady) 
Goniopsyllus rostratus Brapy, Voyage of H. M. S. Challenger, Zool., vol 8, pt. 23, 
Copepoda, p. 107, pl. 42, figs. 9-16, 1883. 
Stations 2; 36; 82. Two females were found at station 2 in the 
temperate Atlantic; the other two stations are in the north Pacific. 
Otherwise, the species was found at 5 stations in the Siboga plankton, 
all in the west Pacific, and irregularly scattered over the entire Pacific 
and once southeast of Iceland in the Carnegie plankton. 
CLYTEMNESTRA SCUTELLATA Dana 
Clytemnestra scutellata DANA, Proc. Amer. Acad. Arts and Sci., vol. 1, p. 153, 1847; 
United States Exploring Expedition, 1838-1842 (Wilkes), vol. 14, pt. 2, 
Crustacea, p. 1194, 1858; pl. 83, fig. 12 a-f, 1855. 
