AKT. S. OX BOECKELLA AND PSEUDOBOECKELLA MAESH, 21 



slight errors in some of the figures, it would seem probable that the 

 armature of this segment, typically at least, consists of 2 terminal 

 spines, one long and one short, and 2 lateral spines on the inner 

 margin. The left exopodite is 2 segmented, the second segment 

 bearing a lateral spine and a terminal scythe-shaped hook; the en- 

 dopodite is short and 1 segmented. The second basal segment of the 

 right foot also bears a hook-like projection on its anterior distal 

 margin, which is nearly as large as the endopodite. Figure 28 shows 

 the fifth feet of the male. 



Length. — According to Ekman, male 2-2.55 mm., female 2.9-3 

 mm.; according to Scott, female 2 mm.; according to Rtihe, male 

 2-2.55 mm., female 2.1-3.1 mm.; and according to Mrazek, male 

 18 mm., female 21 mm. It seems probable that Mrazek's figures of 

 size are a misprint and that they should be, male 1.8 mm., female 

 2.1 mm. 



Patagonia; Tierra del Fuego; Falkland Islands; Kerguelen Island; 

 New Amsterdam Island. 



This has by some been considered identical with Cenfropagcs hrevi- 

 caudatus Brady, 1875 and 1879, but Brady's description is so brief 

 and incomplete that identification of his form is impossible, 



PSEUDOBOECKELLA DUBIA Daday. 



1901. Boeckella dubia Daday, p. 345. 



1902. Boeckella dubia Daday, pp. 236-239, pi. 6, figs. 1 and 2. 

 19056. Boeckella dubia Ekman, p. 600. 



Female. — ^The first antennae extend to the last cephalothoracic 

 segment. The sides of the last cephalothoracic segment extend 

 back to the end of the first abdominal segment and are acute and slightly 

 lobed on the inner margin. The terminal segments of the exopodites 

 are armed with 3 spines. 



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

 longer than the first 2 segments of the exopodite. There is a cuticular 

 extension of the inner distal angle of the second basal segment 

 of the left foot, covering about one-half the first segment of the 

 endopodite. The second segment of the left exopodite bears 2 

 spines. The left endopodite is 2 segmented, the distal segment 

 bearing at its outer end a spine; with the spine the endopodite equals 

 in length the first segment of the exopodite. Figure 29 shows the 

 fifth feet of the male. 



Length. — ^Male, 2.6 mm.; female, 2.5-3 mm. 



Patagonia. 



PSEUDOBOECKELLA LONGICAUDA Daday. 



1901. Boeckella longicauda Daday, pp. 346-347. 



1902. Boeckella longicauda Daday, pp. 243-247, pi. 6, figs. 10, 14, and 16. 

 19056. Pseudohoechella longicauda Ekman, p. 600. 



Female. — The first antennae extend to the last cephalothoracic 

 segment. The sides of the last cephalothoracic segment extend 



