COPEPODS GATHERED BY ALBATROSS—WILSON 267 
Farran’s (1908, p. 25) genus Oxycalanus is a synonym of Sars’ 
(1905a, p. 8) genus Monacilla. Making this correction in the Siboga 
report we find that Scott’s two new species are brought together in the 
same genus, semispina, based on females only, and dubia, based on a 
single male. Furthermore, as two of the Albatross females came out 
of the same deep haul as the single male, the conclusion that they are 
the male and female of the same species, as suggested by Sars in the 
Monaco plankton, is inevitable. 
MONACILLA TYPICA Sars 
PLATE 26, FicurE 380 
Monacilla typica Sars, Bull. Mus. Océanogr. Monaco, No. 26, p. 9, 1905a; Rés. 
camp. sci. Albert de Monaco, No. 69, p. 38, pl. 11, figs. 1-15; pl. 12, figs. 1-10, 
1925. 
Stations 5120; 5246; 5487. Named and diagnosed by Sars in 1905, 
both sexes were fully described and figured in the Monaco plankton, 
but it does not appear in the other lists. Sars considered Scott’s 
Oxycalanus semispinus and Monacilla dubia synonyms of his own 
Monacilla typica. But the fifth legs of the males as here shown are 
certainly those of different species, as can be seen by comparing the 
two figures. The females also seem specifically distinct in the propor- 
tions of metasome and urosome, in the symmetry or asymmetry of the 
genital segment, and in the details of the various appendages, espe- 
cially the third and fourth pairs of legs. There are then three species 
of Monacilla, these two and Sars’ species tenera distinguished by a 
frontal crest. A male of this species (typica) from station 5120, has 
been given U.S.N.M. No. 74126. 
Genus MONSTRILLA Dana, 1849 
MONSTRILLA CLAVATA Sars 
Monstrilla clavata Sars, Crustacea of Norway, vol. 8, p. 14, pl. 6, 1921. 
Two females were obtained at Caldera Bay anchorage, west coast 
of Mindanao, Philippine Islands. The species is not found in any of 
the plankton lists but is fully described and figured in Sars’ account 
(op. cit.). 
MONSTRILLA LEUCOPSIS Sars 
Monstrilla leucopsis Sars, Crustacea of Norway, vol. 8, p. 15, pl. 7, 1921. 
A single female was taken in company with the preceding species 
at the Caldera Bay anchorage, west coast of Mindanao, Philippine 
Islands. It also is not found in any of the plankton lists but was 
described and figured by Sars (op. cit.). 
