646 Beady and Norman — Monograph of the Marine and Freshwater Ostracoda 



appendages which are bulbously swollen at the point of origin and above form a 

 somewhat sword- shaped, flattened and acutely-pointed spine, the face of which 

 has an angulated prominence near the apex, and towards the base a saucer- 

 shaped sucking disk; the setae themselves are also furnished at intervals with 

 slender lateral filaments, some of which give support to several saucer-shaped 

 sucking disks of similar character to, but very much smaller than those of the 

 basal processes. Antennae (PI. lv., fig. 4), with the third joint not longer than 

 the second in both sexes, the appendicular branch is also alike in the sexes, small, 

 three- jointed, and terminating in a straight seta. The mandibular foot (PI. lv., 

 fig. 6) has a securiform, hirsute, undivided masticating process on the basal 

 joint, and present in both sexes ; no forked spines on the first joint of the palp, 

 to the end of which joint is attached above a short lobe usually ending in two 

 setse ; the penultimate joint is long and slender, gradually narrower towards the 

 extremity, its upper margin densely ciliated ; last joint very short, ending in 

 three nails. The first maxillae (PI. lv., fig. 7) have three setiferous lobes at the 

 base; to the end of the ante-penultimate joint is attached another lobe bearing 

 three setae ; the penultimate joint is very broad, and as long as the preceding 

 portion of the limb ; the last joint is very short, and terminates in many spines 

 and setae of varied character. The second maxillae (PI. lv., fig. 8) have four (or 

 five ?) lobes margined with variously formed setae ; the penultimate of these lobes 

 is the chief masticating organ, having six upright, somewhat falciform teeth 

 graduated in length from the outermost to the innermost, and all denticulately cut 

 on their inner edge ; the outer lobe bears stout setae, which are pectinated on one 

 side ; beyond these lobes, is a palp divided into three portions, the central being 

 the wider, furnished with several setae, while the inner ends in three, and the 

 outer in two setae ; beyond is a large semicircular seta-edged, vibratory lamina. 

 The penultimate limb (Pi. lv., fig. 9) has three (four?) setiferous lobes, and 

 outside of these a sub-triangular seta-edged vibratoiy lamina. The last vermi- 

 form, ringed limb (PI. lv., fig. 10) is furnished with numerous spines, which 

 are as usual spinulated at their extremities. The caudal laminae (PL lv., fig. 11) 

 are of the usual structure of Mijodocopa. 



