ObO FRESHWATER ENTOMOSTRACA OF N.S.W. 11. COPEPODA, 



long and slender. Natatory legs biramous, each ramus consisting of three seg- 

 ments, fourth pair in the female with a long curved spine on the inner side of 

 the basal segment. Fifth legs in the male with the terminal segment of the exo- 

 podite ai-med with one spine in the right leg and several short spines in the left 

 leg. Ovisac present. 



Two species known, both from New South Wales. 



Key to species of Gladioferens. 



A. Both rami of the 5th pair of legs in the male composed of three segments. 



spinosus. 

 AA. Endopodites of the 5th pair composed of less than three segments, brevicornis. 



Gladioferens spinosus Henry. 



Proc. Roy. Soc. N.S.W., liii., 1919, p. 32, Plate 1, fig's. 1-7. 

 Distribution.— N.S.W.: Kendall, Waterfall, National Park. 



Gladioferens brevicornis Henry. 

 Proc. Eoy. Soc. N.S.W., liii., 1919, p. 35, Plate 2, figs. 10-12. 

 Distribution. — N.S.W. : Cumbalum. 



Genus Hemiboeckella Sars, 1912. 



Lateral parts of the last segment of the cephalothorax not expanded. Abdo- 

 men composed of three segments in the female, five in the male. Caudal setae, 

 of unequal length, are attached to the outer edge. Right antennule of the male 

 hinged and with large conspicuous aesthetascs. Antennae with the endopodite 

 imperfectly defined from the basal part. Natatory legs with both rami three seg- 

 mented, terminal joint of the exopodite with two spiijes on the outer side. Fifth 

 legs in the male unequal, left leg shorter than the right, endopodites of both legs 

 distinctly segmented. ' 



Only one species is known. 



Hemiboeckella ssarli Sars. 



•Sars, Ai-ch. Math, og Naturvid., 32, 1912, Plate ix., figs. 1-14. 



Female. Cephalothorax moderately slender, tapering anteriorly and pos- 

 teriorly. Head projecting into a "^ell defined rostrum, di^dded at the end into 

 two lappets. Abdomen short, genital segment symmetrical, narrowing towards 

 the base, greatly protuberant ventrally; caudal rami divergent, inner edges 

 ciliated, caudal setae of unequal length, the middle one exceeding the length of 

 the whole abdomen. Antennules short, barely exceeding the cephalothorax. Fifth 

 pair of legs with well developed exopodites, curved process of the second segment 

 coarsely denticulated, terminal segment bearing three spines and three setae; 

 endopodite reaching beyond the second segment of the exopodite. Length, 1.6 

 mm. 



Male. Right antennule provided with numerous large and conspicuous 

 aesthetascs. Fifth pair of legs, basal segment of the left leg produced into a 

 large triang-ular projection, endopodite two-segmented, provided with a single 

 seta; exopodite also two-segmented, first segment bearing a single spine, second 

 segment with a simple terminal spine, a much smaller spine and a curved denticle. 

 Right leg with a three segmented exopodite, each segment bearing a short spine; 

 endopodite three-segmented, the second segment being produced inwardly into a 

 long slender process. 



