20 



PKOCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 64. 



PSEUDOBOECKELLA BREVICAUDATA Mrazek. 



1901. Paraboeckella brevicaudata Mrazek, pp. 8-11, figs. 7, 12, 21, 26, and 27. 



1905a. Boechclla vexillifera Ekman, pp. 16-20, figs. 7-12. 



19056. Pseudoboechella brevicaudata Ekman, pp. 600-601. 



1905&. Pseudobocckella brevicaudata, var. vexillifera Ekman, p. 601. 



1914. PseudoboecJcella brevicaudata Scott, T., pp. 4-5, pi. 1, figs. 1, 7, and 10. 



1921. PseudoboecJcella brevicaudata Ruhe, pp. 56-61, fig. 20, a-e, fig. 21, a-d. 



Female. — The first antennae extend to the third or fourth cephalo- 

 thoracic segment. The sides of the last cephalothoracic segment are 

 asymmetrical, the left side being the larger; there are no inner lobes, 

 but the inner margins are sinuate; they extend backward according 



Figs. 27-2S.— 27, Pseudoboeckella braziliensis Lubbock, fifth feet of male, after Mrazek. 28, P. 



BREVICAUDATA MRAZEK, FIFTH FEET OF MALE, AFTER MRAZEK. 



to Ekman's figure one-half the length of the first abdominal segment, 

 according to Riihe's figure beyond the first abdominal segment. The 

 terminal segments of the exopodites of the fifth feet have 7 spines. 



Male. — In the fifth feet the secotid segment of the right exopodite 

 is slender, somewhat curved, and bears on its distal end a curved 

 hook whose general position is approximately at right angles with 

 the second segment. The right endopodite is 3 segmented, the first 

 segment being nearly as broad as long, and the second and third 

 segments long and slender; the third segment bears at the tip 2 spines, 

 one long and one short; these 2 spines are shown in the figures of 

 Elunan and Scott, but only 1 in the figures of Mrazek and Riihe; 

 Mrazek, Ekman, and Ruhe show also on this third segment 2 small 

 lateral spines. Scott shows no lateral spines; if we may assume 



