266 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
Genus MICROSETELLA Brady and Robertson, 1873 
MICROSETELLA NORVEGICA (Boeck) 
Setella norvegica Boeck, Forh. Vid. Selsk., Christiania, for 1864, p. 281, 1865. 
Stations 8; 6; 7; 18-16; 19; 21-23; 25; 26; 33-35; 45; 49; 53; 63; 
64; 67; 70; 5175; 5176; 5262; 53820; 5430; 5437; 5601. This minute 
species was found rather sparingly in both the Atlantic and Pacific 
Oceans and was usually taken in surface tows. It occurs in all the 
subsequent plankton lists except the Monaco. 
MICROSETELLA ROSEA (Dana) 
Canthocamptus roseus DANA, United States Exploring Expedition, 1838-1842 
(Wilkes), vol. 14, pt. 2, Crustacea, p. 1189, 1853; pl. 83, fig. 10, 1855. 
Stations 84; 36; 41; 42-45; 47; 52; 54; 55; 57; 62-68; 71; 73; 75-77; 
79; 80; 82; 4588; 4644; 4663; 4806; 5186; 5234; 5320; 5338; 5340; 
5348 ; 5386; 53899; 54380; 5437; 5601; 5647; 5651; 5657. This is twice 
the size of the preceding species, and even after long preservation 
usually retains a rosy tint on the head and anterior part of the body. 
This copepod is present in all the plankton lists except the Challenger; 
in the Carnegie plankton it was found at 70 percent of all the stations. 
Genus MIRACIA Dana, 1846 
MIRACIA EFFERATA Dana 
Miracia efferata DANA, Proc. Amer. Acad. Arts and Sci., vol. 2, p. 46, 1849; United 
States Exploring Expedition, 1838-1842 (Wilkes), vol. 14, pt. 2, Crustacea, p. 
1260, 1853; pl. 88, fig. 11, 1855. 
Stations 4037; 5246; 5334; 5386; 5437. This small copepod was 
found in very limited numbers in all the planktons except the Siboga. 
It appears most frequently in surface tows. 
Genus MONACILLA Sars, 1905 
MONACILLA SEMISPINA (A. Scott) 
PLATE 26, FIGURE 379 
Monacilla dubia A. Scott, Copepoda of the Siboga-Expedition, monogr. 29a, pt. 1, 
p. 35, pl. 3, figs. 17-29, 1909. 
Station 5246, A single male (U.S.N.M. No. 74125) was captured in 
a vertical haul from a depth of 100 fathoms at this station east of 
Mindanao. It corresponds exactly with Scott’s description and 
figures of a single male from the Banda Sea, which he made a new 
species with the name AZonacilla dubia on page 385 of the Siboga re- 
port. But on an earlier page, page 33, he described another new 
species, Oxycalanus semispinus, founded on females alone. However, 
