4 Dr. T. Scott on some 



1898. Boeckella brasiliensis, CHesb, & Schmeil. Das Tierreich, 6 Liefo 

 rung, Oopepoda, I. Gymnoplea, p. 60. 



1901. Pseudoboeckella poppei, Mrazek, (5) p. 6. 



1902. Boeckella poppei, Daday, " Mikroskopische Siisswasserthiere aus 

 Patagonien," in Termesz. Fiizet. 25. 



1905. Boeckella entzi, Ekinan, (2) p. 14, pi. i. fig. 6. 

 1909. Pseudoboeckella poppei, Sars, (13) p. 22, pi. iii. 



The structure of the fifth pair of thoracic legs in the male 

 constitutes one of the more important characters by which 

 this species may be distinguished. The inner ramus of the 

 left leg is very rudimentary, as in Boeckella, but that of the 

 right is tolerably well developed and consists of three distinct 

 moderately stout joints, and the end joint is provided with 

 four spiniform setse, two on the outer margin and two at the 

 apex, as shown in the drawing (fig. 9). A full description, 

 with excellent figures of this species, will be found in G. O. 

 Sars's paper on fresh-water Entomostraca from South Georgia 

 referred to above. 



This species was obtained in a fresh-water gathering from 

 Hill Cove, but in none of the other samples examined. 



Length of female 2" 8 mm. ; male somewhat smaller. 



Pseudoboeckella brevicaudata (Mrazek). 

 (PL I. figs. 1, 7, 10.) 



(?) 1875. Centropages brevicaudata, Brady, (1) p. 162. 



1901. Paraboeckella brevicaudata, Mrazek, (5) p. 8, figs. 6, 7, 12, 21, 



et seq. 

 1905. Boeckella ve.riUifera, Ekman, (2) p. 16, figs. 7-12. 

 1905. Pseudoboeckella brevicaudata (Mrazek), var. vexillifera, Ekinan, 



(3) p. 601. 



This species (or variety) was obtained in gatherings from 

 moor-pools and other small bodies of fresh water, and both 

 males and females with ovisacs occurred in the same 

 gatherings. 



Female. — In this species the abdomen of the female is 

 short, three-segmented, and with the middle segment small. 

 The fifth pair of thoracic legs has the outer ramus tolerably 

 stout and elongated, the inner distal angle of the second joint 

 is produced into a strong curved spine much larger than that 

 in Pseudoboeckella poppei ; the end joint is rather narrower 

 than the second and is one and a half times its length, and 

 carries three short setae on the inner margin, one about the 

 middle of the outer margin and three at the apex, the middle 

 apical seta being tolerably stout and elongated. The inner 

 ramus only reaches to a little beyond the second joint of 

 the outer and is much narrower than it ; the end joint of the 



