85 



Occurrence. The only place where I have as yet met with this species, 

 is in a shallow muddy swamp located on the Fornebo peninsula, at some 

 distance west of Christiania. Male and female specimens occurred here in about 

 equal number. 



Distribution. Sweden (Lilljeborg), British Isles (Brady), ? Germany (G. W. 

 Muller), Bohemia (Vavra). 



Gen. 10. Cryptocandona, Kaufmann, 1900. 



Generic Characters. Shell thin and much compressed, with the valves 

 nearly equal and having the inner duplicatures rather broad. Antennae, mandibles 

 and maxillae about as in Candona. Maxillipeds however with the vibratory 

 plate less rudimentary, carrying 3 well developed plumose setae. Anterior legs 

 rather slender. Posterior legs with 2 additional setae inside, not found in 

 Candona, the one attached in the middle of the penultimate joint, the other at 

 the end of the preceding joint; apical setae, as in Candona, 3 in number, but 

 exhibiting a somewhat different mutual relation, the outermost seta being much 

 longer than the other 2 and more abruptly reflexed. Caudal rami comparatively 

 large, but with the dorsal seta extremely small, almost obsolete. Male specimens 

 not yet observed of any of the species. 



Remarks. This genus proposed by Kaufmann is nearly allied to Candona, 

 and has indeed not been admitted as such by the most recent author, Dr. Aim, 

 who regards it to represent only a subsection or group of that genus. I think 

 however that this genus ought to be supported, as it exhibits some well-marked 

 differences from Candona found in all the species. As observed by Kaufmann, 

 the genus shows in several respects an approach to the next genus, Candonopsis, 

 occupying, as it were, an intermediate place between it and Candona. The 

 male characters remain to be made out, and will no doubt present some 

 peculiarities. 5 species referable to the present genus are as yet known, 2 of 

 them being represented in the Fauna of Norway. 



23. Cryptocandona Vavrai, Kaufmann. 



PI. XL, fig. 1). 



Cryptocandona Vavrai, Kaufmann, Cypriden und Darwinutiden der Schweiz, p. 391, PI. 24, 



figs. 1215, PI. 26, figs. 1016. 



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

 shape, only slightly higher behind than in front, greatest height about equal 

 to half the lenght, dorsal margin straight in the middle and somewhat abruptly 



