RECENT BRITISH OSTRACODA. 



<\ 



ornament of the shell is not noticed by lilljeborg, and is, indeed, visible only in spe 

 cimens of moderate age, while they remain free from opacity. 



I 1-. Candona Candida (Midler). (Plate XXV. figs. 1-0, Plate XXXVI. fig. 13, and rial' 



XXXVII. fig. 1.) 



Cypris Candida, Miiller, Entomostraca, p. 62, tab. vi. figs 



Taf. i. figs. 1-10. 

 Monoculus candidus, J urine, Hist, des Monocles, p. 176, pi. 

 Candona lucens, Baird, Brit. Entom. p. 160, tab. xix. fig. 1. 

 (?) similis, idem, ibidem, p. 162, tab. xix. figs. 2, 2a. 



9; Zenker, Auat.-svst. Studien, p. 76. 



Tl 



Candida, Lilljeborg, De Crust, ex ord. trib. p. 127, tab. xi. figs. 19, 20, tab. x\v. figs. 1 .5-15 j Jones, 



Tertiary Entom. p. 19, pi. i. figs. Sa-Sf, 5a, 5b. 



Valves oblong, lower in front than behind, reniform in the male subtriangular in 

 the female; greatest height equal to more than half the length. Anterior margin 

 rounded and narrow. Posterior margin obliquely rounded and produced into a more or 

 less prominent angle inferiorly. The ventral margin is only slightly sinuated in the 

 young and in adult female specimens, but in old examples and in the adult mate 

 deeply sinuated at the anterior third, and bulges considerably behind (tigs. 7, 8). 

 dorsal margin is highest at the posterior third, from which it slopes, in a flattened areln 

 to the front. The outline, as seen from above, is oblong-ovate, pointed in front, and 

 rounded behind, widest in the middle; greatest width equal to half the length. End 

 view broadly ovate, somewhat angular at the base, and rounded above. Lucid spots six, 

 oblong, their long diameters nearly parallel to that of the shell, arranged in two ' 

 an anterior transverse row composed of four spots, and a posterior row of two, placed 

 directly behind the lower spots of the front row. Surface of the shell smooth, pearl v or 

 yellowish white, with darker yellow cloudings toward the dorsal margin. YotMg spe- 

 cimens are regularly oval, and present none of the angulation characteristic of the adult 

 The seta? of the upper antenme are very short, and arranged as in Cyf " 



The clav - of 



antennae 



attachment ; the palp 



_ long and slender. The mandibles and maxilla- do not differ iron, 



those of Cypri,, exeept in the absence of the branehial appendage ol the second pro 



of maxillT The palp of the seeond jaw in the male is ped.form, -j-S«« 



tnmg curved claw anc two shorter ones, which spring from the mner border f < ks 



joint ; the central part of the joint has a curions oval depress.,,, P^^j^ 



**. , the penultimate joint bears one ^J^t^^SE. £ 



two terminal claws slender, and nearly equal m length, o^e 1 



one on the inner margin of the ramus below the ™^ . ^ "J ,,, ment , Th , 



-Undrical, transversely striated axis, ^^^S!fS intertwined or laid 

 fermatozoida seem to be composed of two filaments, e th ei spi 



* by side (see Plate XXXVII. fig. 1 0- »-** £S32£* pes- 

 ossor T. Rupert Jones in slightly brack.sh water **»£+ J™ ^ to that of 



terioi extremity of the shell a peculiar reticulated pattern (fig. J), ™*J 



