THE OSTRACODA 69 



segments, endopodite minute and generally prehensile in male ; five pairs 

 of post-oral limbs ; caudal furca with lamellar rami armed with spines. 



Family HALOCYPRIDAE (CONCHOECIIDAE). Halocypris, Dana ; 

 Conchoecia, Dana. Family ASTEROPIDAE. Asterope, Philippi ( = Cylindro- 

 leberis, Brady). Family CYPRIDINIDAE. Cypridina, H. Milne-Edwards ; 

 Philomedes, Lilljeborg (Fig. 33, A) ; Pyrocyjiris, G. W. Miiller ; Giganto- 

 cypris, G, W. Miiller. Family RUTIDERMATIDAE. Rutiderma, Brady and 

 Norman. Family SARSIELLIDAE. Sarsiella, Norman. 



ORDER 2. Cladocopa. 



Shell without antennal notch ; antennae biramous, both rami well 

 developed and natatory ; only three pairs of post-oral limbs ; other 

 characters as in Myodocopa. 



Family POLYCOPIDAE. Polycope, G. O. Sars ; Polycopsis, G. W. 

 Miiller. 



ORDER 3. Podocopa. 



Shell without antennal notch ; antennae with basal segment not 

 enlarged, one ram us (exopodite, Miiller) vestigial or absent, the other of 

 not more than four segments ; five pairs of post-oral limbs ; caudal furca 

 with styliform or vestigial rami. 



Family PARADOXOSTOMATIDAE. Paradoxostoma, Fischer. Family 

 CYTHERIDAE. Cythwe, O. F. Miiller; Cythereis, G. 0. Sars (Fig. 33, 

 C) ; Krithe, Brady. Family DARWINDLIDAE. Daru-inula, Brady and 

 Robertson. Family BAIRDIIDAE. Bairdia, M'Coy. Family CYPRIDIDAE. 

 Cypris, O. F. Miiller (Fig. 33, B) ; Pontocypi-is, G. O. Sars. Family 

 CYPRIDOPSIDAE. Cupridnpsis, Brady. 



ORDER 4. Platycopa. 



Antennae biramous, protopodite of two segments, endopodite of three, 

 and exopodite of two segments ; only four pairs of post-oral limbs ; other 

 characters as in Podocopa. 



Family CYTHERELLIDAE. Cyiherella, Bosquet. 



LITERATURE. 



1. Brady, G. .S'. A Monograph of the Recent British Ostracoda. Trails. Linn. 



Soc. xxvi. pp. 353-495, pis. xxiii.-xli., 1868. 



2. - Report on the Ostracoda. Rep. Voy. "Challenger," Zool. i. 184 pp. 



44 pis., 1880. 



3. Brady, G. S. , and Xorman, A. J7. A Monograph of the Marine and Freshwater 



Ostracoda of the North Atlantic and of North-Western Europe. Trans. 

 Roy. Dublin Soc. (2) iv. pp. 63-270, pis. viii.-xxiii., 1889; and v. 

 pp. 621-746, pis. l.-lxviii., 1896. 



4. Clans, C. Beitr. zur Kennt. der Ostracoden. 1. Eutwicklungsgeschichte 



von Cypris. Schr. Ges. Naturwiss. Marburg, ix. pp. 151-166, 2 pis., 

 [lS68fl872. 



