



RECENT BRITISH OSTRACODA. 



393 



Pamilv 2. Cytherld^:. 



r 



w 



r 



o 



o 



72 

 0> 



•5 



o 





"5 





2 • 



r 



Lower 



antennas 



4-jointed. 



Upper 



antennse 



5-jointed ; 

 last three 

 j oints 



r 



I 



< 



elongated, 

 their united 

 lengths more 

 than that oi-i 

 the preceding 



j oint ; 



destitute of spines; bearing only a few short slender 

 setae 



Limnicythcrc. 



{ alike. Internal C well developed . 

 more or less lobe of the firsts 

 strongly spini- pair of maxillae ( rudimentary . 

 ferous. 



Feet in the"! dissimilar ; right foot of first pair 



Cythi . 



Eucytht 



< 



male and fe- 

 male 



in the male prehensile, right oi the 

 second pair very weak and rudi- 

 mentary 



Vijthtridru. 



short and stout, their united length shorter than that of the pre- ) 

 ceding joint, bearing long curved spines. First two pairs of feet only I 



O *-• i-„J T)* "L4- iV*«.4- ^ Inat nnm in +no mala V4rv»VlonGllfl TviTOC 1 



3-jointed. 

 wanting 



Right 



bot of last pair in the male prehensile. 



Eyea C 



I/yobaUs. 



— 



° s 



3 a J 



on £ 



ce o 





c5 



d 



i«H 



H3 



6-j ointed ; " | 

 beset with 



pie setae; J> 

 last four mostly much elongated and slender, un 



j oints J 



Xedokhm. 

 Loxowmcha. 



i 



7-jointed; first two joints very large and stout, last five slender and bearing I Bythonith , r( ,. 

 moderately long setae ' 



5-j ointed; beset with short scattered haii^s. Postabdominal lobes broad and short, I Cyt}u>r(>pieru)L 

 bearing three setse. No eyes ' 



o 



u 



o 



Lower 



antennae 



5-jointed, 



Upper 



antennse 



6-j ointed ; 

 last four 

 J joints 



much narrower than the preceding, and bearing scattered short) 



hairs, which are in part spiniform. Postabdominal lobes rudimen- [ lylherura. 



tary, destitute of hairs. Two separate eyes .... 



• 



\ 



not narrower than the preceding, and beset towards the apex with 



numerals long set*. Postabdominal lob,- larger than ordinary^ Sclcrochilm. 



bipartite, and bearing live setae. One eye 



wards, and bearing three hairs. Eyes wanting > 



| Cytherukis). 



Mouth 



e sub 

 rliform 



;1 



conical protuberance. Urgan 

 palp very narrow, destitute of 



'fist pair of jaws composed of narrow and V Paradox**** 



Eve sin<rle 



Shell mostly hard and compact, calcar 



surfac 



lly more or less rou^li and 



uneven, 



sionally quite smooth 



Hinge-mar 8 



mostly toothed 



Antenna? not 



a ,' ""^""""J ^ U1LC 01 " , ° . fiv . r seven joints and armed with various 



adapted for swimming the upper composed * & « ^ ^^ and armcd witU „e 



■eto or spines ; the inferior «*»**«* J ^Trush o set. whieh mostly oeeurs in 

 o three eurved elaws, second jomt des itute ^ the h ush ^^ ^ 



the Cypnte : fost *t » jketss :» l as «* « ^ - *-. . 



extends downwards 

 connected by an efferent tube with 

 y ery similar to that of the Cypridae 

 a branchial plate 



Mandible 



land situated in the body of the animal 



One nair of jaws, composed of four segments, with 



of the uypnom. One pair o U I fa sh ^ 



Three pairs of feet, directed »» J d 



of them adapted for crcepm 



length from ™»}^-££X* correspond with the palp of 



tenninatinff in a simile strom? curved claw 



-uunatmg in a single strong curvtu «»- £ represeil tcd by two small 



^e second maxilla in the Cyprid*, the cutting segments b ^ rmlime ntarv arul 



setifei 



L'OUS 



ppenda 



o 



arising 



from a common base 



Postabdomen rudimentary 



3 



V 0L. XXVI. 



