SOME AUSTRALIAN FRESHWATER COPEPODA AND OSTRACODA. 31 



BOECKELLA MINUTA, SarS. 



This species was first described by Sars in "Freshwater 

 Entomostraca from the neighbourhood of Sydney."( 20) He 

 again gave a description of it in " Freshwater Oopepoda 

 from Victoria." (27) 



This form was found in abundance in a pond in the 

 University grounds in June and July. It was also found at 

 Kendall in June and at Corowa in March. 



Sars recorded it from Botany Bay, the Waterloo Swamps 

 and from Heidelberg near Melbourne. 



Genus GLADIOFERENS n. g. 



Cephalothorax consisting of six segments, last segment 

 rather short with the lateral parts only slightly expanded, 

 rounded. Abdomen consisting of four segments in the 

 female, five in the male. Caudal rami long and slender. 

 Antennules in the female consisting of twenty-five seg- 

 ments; right antennule in the male geniculate. Antennae, 

 with the outer ramus about the same length as the inner, 

 composed of six segments. Oral parts of normal structure. 

 Natatory legs biramus, each ramus consisting of three 

 segments; basal segment of each leg of the fourth pair in 

 the female bearing a long curved sword-like spine on the 

 inner edge. Fifth legs in the female similar, each with a 

 curved process on the inner edge of the middle segment of 

 the outer ramus. Fifth legs in the male dissimilar, outer 

 ramus usually three segmented, terminal segment of the 

 outer ramus of the right leg armed with one long spine, 

 that of the left leg armed with several short spines. 

 Ovisac present, situated on the ventral surface. 



This genus is nearly allied to Boeckella, De Guerne and 

 Richard, with which it agrees in the structure of the oral 

 parts, the natatory legs and the fifth p.air of legs in the 

 female. It differs, however, in the number of abdominal 



