624 Brady and Noeman — Monograph of the 3Iarme and Freshwater Ostracoda 



OSTEACODA, Latreille, 1802. 



Synopsis of Sections and Families. 



Section I. — Podocopa, G. 0. Sars, 1865. 



Autennse simple, sub-pediform, geniculate, furnished with ungues, in other 

 respects not very unlike the antennules. Both antennules and antennae either 

 bear long setse, being thus adapted for swimming, or are shortly setose, when the 

 only means of progression is walking. First maxillae always furnished with a 

 branchial appendage. Caudal laminae either rudimentary, or when developed 

 consisting of slender, elongated laminae, with few terminal ungues. 



A. Last three limbs pediform, without branchial appendage. Mandible simple, 



very narrow and stiliform (without palp or branchial appendage), 

 enclosed in a tube formed by the labrum and labium, the whole 

 apparatus adapted iox suction. Caudal laminae rudimentary. Fam. 

 Paradoxostomatidce, Brady and Norman, 1889. 



B. Last three limbs pediform, without branchial appendage. Mandible 



toothed and adapted for chewing, furnished with a sub-pediform palp 

 and a branchial appendage. Caudal laminae rudimentary, in the form 

 of setiferous lobes. Fam. Cytheridoe, Baird, 1850. 



C. Last three limbs pediform, the first with a branchial appendage. Mandible 



nearly as in Cytheridoe. Caudal laminae not developed, represented by 

 a small sub-conical process. Fam. DarwinuUdoe, Brady and Norman, 

 1889. 



B. Last three limbs j)ediform, the first of these with a branchial appendage. 

 Mandible nearly as in the Cytheridoe. Caudal laminae not large, narrow, 

 linear, furnished with terminal ungues as in Cyprididce. Fam. Bairdiidoe, 

 G. 0. Sars, 1887. 



E. Only last two limbs pediform ; the preceding pair small and maxilliform 



in female, larger and modified for grasping in male ; furnished with 

 a branchial appendage. Mandible nearly as in Cytheridoe. Caudal 

 laminae long, narrow, linear, terminating in ungues. Fam. Cyprididce, 

 Baird, 1850. 



F. As Cyprididce, but the caudal appendages minute, consisting of setiform 



processes, which run out to a very fine extremity. Fam. Cypridopsidce, 

 Brady and Norman. 



