86 



bent both ind front and behind, ventral margin distinctly sinuated, anterior 

 extremity evenly rounded, posterior somewhat obliquely deflexed and round- 

 ded off below; -- seen dorsally, narrow oblong in outline, with the side-edges 

 almost straight in the middle, greatest width scarcely attaining Vs of the length, 

 both extremities obtusely pointed. Valves smooth, glabrous, and clothed at 

 each extremity with short and delicate hairs; inner duplicatures remarkably 

 broad both in front and behind. Anterior antennae with the terminal part 

 scarcely as long as the basal one, and having the 4 first joints comparatively 

 short, last joint however remarkably slender and narrow, being fully as long 

 as the 2 preceding joints combined. Maxillipeds with the palp comparatively 

 short and stout, bluntly rounded at the tip. Posterior legs with the penulti- 

 mate joint not subdivided, shortest apical seta scarcely longer than the terminal 

 joint and hamiform curved. Caudal rami perfectly straight and gradually tape- 

 red, apical claws moderately strong and slightly curved, the distal one scarcely 

 exceeding half the lenght of the ramus. Genital lobes evenly rounded. 



Shell semipellucid, of whitish or light grey colour. 



Length of adult female 0.90 mm. 



Remarks. This form, being that described at the earliest date, ought of 

 course to be regarded as the type of the present genus. It is readily recog- 

 nised from any of the species of Candona by the very much compressed and 

 rather regularly reniform shape of the shell. 



Occurrence. I have taken this form, many years ago, in a shallow ditsh 

 at some distance west of Christiania (Bogstad), and have more recently also 

 met with in another locality, viz., at Grimstad, south coast of Norway. All 

 the specimens collected were of the female sex und fully grown. 



Distribution. Sweden (Ekman), Switzerland (Kaufmann). 



24. Cryptocandona reducta, (Aim). 



(PI. XL, fig. 2. 

 Condona reducta, Aim, Monographic der Schwedischen Siisswasser Ostracoden, p. 137. 



Specific Characters. Female. Shell, seen laterally, narrow oblong in 

 shape, scarcely higher behind than in front, greatest height in the middle and 

 not nearly attaining half the length, dorsal margin well arched, without any 

 abrupt bend either in front or behind, ventral margin only very slightly sinu- 

 ated, anterior extremity evenly rounded, posterior somewhat exerted and obtusely 

 blunted at the end; seen dorsally, narrow lanceolate in outline, with the 

 side-edges evenly curved and both extremities sharply pointed. Valves very 



