ART. 8. 



ON BOECKELLA AND PSEUDOBOECKELLA MARSH. 



9 



Female. — The first antennae extend to or beyond the furca. The 

 sides of the last thoracic segment are not lobed and do not reach 

 beyond one-half first abdominal segment. The terminal segments of 

 the exopodites of the fifth feet are armed with 3 spines. 



Male. — In the fifth feet the right endopodite is 3 segmented (2 

 segmented in yygmaea Daday and michaelseni Scott) and nearly or 

 quite equals the first segment of the exopodite; the left endopodite 

 is 1 segmented and rudunentary ; the first segment of the left exopodite 

 is convex and spinose on the inner side. Figure 10 shows the fifth 

 feet of the male. 



Figs. S-10.— 8, Boeckella insignis Smith, fifth feet of male .after Smith. 9, B. longiseta Smith, 



FIFTH FEET OF MALE, AFTER SMITH. 10, B. MICHAELSENI MRAZEK, FIFTH FEET OF MALE, X 120, AFTER 



Mrazee. 



Length. — Male, 1 mm.; female, 1.15 mm. 

 Tierra del Fuego ; Argentina ; Falkland Islands. 



BOECKELLA MINUTA Sars. 



1896. BoecJcella minuta Sars, pp. 71-74, pi. 8, figs. 5-7. 



1898. Boeckella minuta Giesbrecht and Schmeil, p. 62. 



1908. Boeckella minuta Sars, pp. 10-11, pi. 2, figs. 1-4. 



1919. Boeckella minuta Henry, p. 31. 



1922. Boeckella minuta Henry, p. 558. 



Female.— The, first antennae extend to the furca. The sides of the 

 last cephalo thoracic segment are produced backward nearly the 

 length of the first abdominal segment and have small inner lobes. 

 20183— 25— Proc.N.M.vol.64 9 



