no. 1651. REPORT ON THE OSTRACODA—SHARPE. 4^^ 



Five species of this genus have been described — X. entzi Daday 

 (Ceylon), N. fuscatus Brady ( Australia ), N. madaraszi Orley (Hun- 

 gary),^, monacha O. F. Miiller, X. oculatus Sars (Sumatra). Newn- 

 hamia patagonica Vavra, 1898, was originally described as a species 

 of Xotodromas, but was later decided by Vavra to be a Xewnhamia, 

 X. madaraszi seems to be a type of a new genus, as it differs from the 

 typical Xotodromas in many ways, notably the spine-like setae of the 

 furca being five in number, in place of three, character of arma- 

 ture of the terminal segment of the second foot, the end segment 

 being beak-shaped and with short claws, more similar to the Cyp- 

 ridinae. It is therefore my opinion that the species X. madaraszi 

 Orley should be the type of a new genus. 



23. NOTODROMAS MONACHA (O. F. Miiller). 

 Plate LIX, figs. 1-8. 



Cypris monacha O. F. Mutxer, Entomos. sen Insecta testaeea, 1785, p. 60, 

 pi. v, figs. 6-8. — Zaddach, Synop. Crust. Pruss. Prodr., 1844. p. 31. — 

 Fischer, Meru. des Sav. Etrang. de l'Acad. de St. PGtersbourg, VII, 

 1854, p. 146, pi. iv, figs. 1-11. 



Xotodromas monacha Lilljekorg, Orn de inom Skane forekomniende Crust. 

 af Ord. Cladocera, Ostracoda och Copepoda. Lund., 1853, p. 95, pi. vm, 

 figs. 1-15; pi. xii, figs. 1, 2; pi. xxv, fig. 16. — Brady and Norman, Trans. 

 Royal Soc. Dublin, 1889, p. 96. — Vavra. Arch. Naturw. Durchforsch. 

 Bohmen., 1891, p. 32, figs. 6-9. — Kaufmann, Revue Suisse de Zool., 

 VIII, 1900, p. 251, pi. xv, figs. 1-4; pi. xvn, figs. 1-10; pi. xvin, figs. 

 1-3; pi. xxix, fig. 15.— Mui.ler, Zoologica, XII, Heft. 30, 1900, p. 47. 

 pi. xi, figs. 8-22 ; pi. xii, fig. 11. 



dimensions. — Length, 1.18 mm. ; breadth, 0.T5 mm. ; height, 0.0 mm. 



Seen from the side (fig. 1), this peculiar form is at once distin- 

 guished by its humpbacked appearance. The dorsal and ventral 

 margins of the anterior half of the shell nearly parallel, after which 

 the dorsal edge suddenly diverges to form a dorsal hump just back 

 of the eyes, this shell widest just back of the middle. Posterior end 

 bluntly rounded, sparingly hairy; the anterior end with a wide hya- 

 line flange, sparingly hairy, and appearing as though crenulate, 

 because of the small tuberculations which more or less cover the 

 anterior part. 



Seen from above (fig. 2), the shell is regularly oval, egg-shaped, 

 but pointed anteriorly. Eyes two, plainly separate. 



Second antenna G-segmented. Natatory setse reaching almost to 

 tips of terminal claws, five in number, and plumose. Terminal and 

 penultimate segments approximately the same length. Antepenulti- 

 mate segment but two-thirds as long. Terminal segment narrow, 

 eight times as long as wide: penultimate segment wider, about four 

 times as long as wide. 



Proc, X. M. vol. xxxv — 08 27 



