568 FRESHWATER ENTOMOSTRACA OF X.S.W. ii. COPEPODA, 



of the last segment, distinctly keeled dorsally and bearing a seta about the middle 

 of the dorsal surface; two long setae situated on the outer edge, each accompanied 

 by a cluster of spinules; middle apical seta exceptionally long for the genus, 

 outer seta of moderate size, inner one very small and slender. Antennules com- 

 posed of seven segments, the outer portion including only three segments. Both 

 rami of the first pair of leg's (PI. Ivii., fig. 6) composed of three segments, the 

 exopodite scarcely reaching beyond the fli-st segment of the long endopodite; the 

 second pair (PI. Ivii., fig. 4) has a long three-segmented exopodite and a short 

 two-segmented endopodite, the first segment of the latter being very small, the 

 3rd and 4th pairs have also long three-segmented exopodites, and two-segmented 

 endopodites but the second segments are shorter than those of the second pair. 

 The fifth pair (PI. Ivi., fig. 3) is well developed, the inner expansion of the 

 proximal segment being large and bearing 6 long setae. Length, .70 mm. 



Male. Smaller than the female, only attaining a length of .55 mm. An- 

 tennules (PL Ivii., fig. 7) transformed into hinged grasping organs. The three- 

 segmented exopodite of the fii'st two pairs of legs comparatively long and pro- 

 vided with long setae, the endopodite of the first pair is long and three-segmented, 

 that of the second is very short and two-segmented ; in the third pair the exopodite 

 is three-segmented and is short and stout, the endopodite is also three-segmented, 

 the second segment bearing an extremely long seta on the inner side and the 

 slender terminal segment bearing two long setae. Fifth pair of legs small, the 

 inner expansion of the proximal segment bearing two unequal setae. 



This species is in some respects nearer to the genus Attheyella than to 

 Moraria, especially in the long, well-developed caudal setae and in the structure 

 of the first pair of legs; it is true to the genus Moraria, however, in the possession 

 of a triangular expansion behind the anal operele and in having antennules com- 

 posed of only seven segments. There is no doubt that the two genera are closely 

 allied. 



Distribution. — N.S.W. : Holbrook. 



List of works referred to. 



Brady, G., 1886. — Notes on Entomostraca collected by Mr. A. Haly in Ceylon. 



Journ. Linn. Soc. Lond., Zool., xix., p. 293. 

 Breinl, a., 1911. — Report of .the Australian Institute of Tropical Medicine, p. 17. 

 Chilton, C, 1917. — Results of the South Australian Museum Expedition to 



Strzelecki and Cooper Creeks. Trans. Boy. Soc. S. Aust., xli., p. 



475. 

 Pischer, S., 1853. — Beitrage zur Kenntniss der Cyclopiden (Fortsetzung). Bull. 



Soc. Imp. Moscow, p. 94. 

 Henry, M., 1919. — On some Australian Freshwater Copepoda and Ostracoda. 



Proe. Boy. Soc. N.S.W., liii., p. 29. 

 King, R. L., 1855. — On Australian Entomostracans. Proc. Roy. Soc. Tasmania, 



iii., Part 1. 

 Koch, C. L., 1835. — Deutschlands Crustaeeen, Myriapoden und Arachniden. 

 Playpaie, G. I., 1914. — Contributions to a knowledge of the Biology of the Rich- 

 mond River. Proc. Linn. Soc. N.S.W. , xxxix., p. 93. 

 Sabs, G. 0., 1835. — Oversight Ferskvandscopepoder, p. 47. 

 , 1862. — Oversight af de indenlandske Ferskvandscopepoder. Christ. 



Videns. Sels. For. 

 , 1889. — On some Freshwater Ostracoda and Copepoda raised from Dried 



Australian Mud. Christ. Videns. Sels. For., No. 8. 



