1910.] BRITISH SPECIES OF OSTRACODA. 197 



or brownish • seen by transmitted light of a smoky colour, and 

 ornamented with a few small distant circular papillae Length 

 1—1 '1 mm. 



The anterior antennae are slender ; the last three joints 

 are twice or thrice as long as broad, and bear long setae; 

 posterior antennae destitute of setose fascicle, each joint bearing 

 only one or two short rigid hairs (fig. 5) ; " sense organ " * simply 

 tapered, subsigmoid in shape (fig. 5) ; mandibular palp short 

 and stout (fig. 6) ; palp of the second pair of maxillae in the female 

 not much elongated, bearing four apical setae ; in the male the 

 prehensile portion of the limb both right and left is short and 

 stout and has the usual spinous armature (tigs. 7, 8) ; the feet of 

 the last pair are not forcipate, but bear four apical setae, three 

 long and one short (fig. 9). Caudal rami nearly alike in both 

 sexes, slender, bearing two slender non-pectinate terminal claws 

 (fig. 1 0) ; marginal seta nearly as long as the claws, situated slightly 

 beyond the middle of the limb. 



Candona angulata G. W. Midler. (Plate XX. figs. 1-8.) 



1900. Candona angulata G. W. Midler, (5) p. 18, pi. i. 

 figs. 1-17. 



1866. Candona Candida G. S. Brady, (1) pi. xxv. figs. 8, 9. 



1889. Candona Candida Brady & Norman (in part), (2) p. 99. 



Shell of the male (fig. 1) seen laterally, elongated, subreniform, 

 greatest height equal to more than half the length and situated 

 much behind the middle; anterior extremity narrowed and rather 

 obliquely rounded ; posterior wider and obtusely angulated below 

 the middle ; dorsal margin sloping with a very slight curve from 

 the highest point to the front, with a very steep and well pro- 

 nounced curve backwards ; ventral margin deeply sinuated in the 

 middle : seen from above (fig. 2) the outline is oblong oval, with 

 pointed extremities, more than twice as long as broad, widest in 

 the middle. Shell-surface smooth, with a few distant, circular 

 papillae, often marked toward the posterior extremity with a 

 beautifully reticulated ornament. Right valve smaller than the 

 left which overlaps atboth extremities. Length 1*6 mm. 



Setae of the anterior antennae rather short, not exceeding in length 

 the last six joints of the limb ; prehensile portion of the second pair 

 of maxillae (figs. 4, 5) falcate, bearing near the extremity of the 

 concave margin, on the left limb one spine, on the right two longer 

 spines. Caudal rami slender (fig. 7), bearing two slender apical 

 setae and one short hair, and beyond the middle of • the posterior 

 margin a single long hair. 



The shell of the female is somewhat smaller — length 1*4 mm. — ■ 

 longer in proportion to height, and having a less sinuated ventral 

 with a less strongly arched dorsal margin. (fig. 3). 



This species was figured- and briefly noticed -in the 'Monograph 



:. . * " Spur-organ " uf Continental authors. ■ ■■ ' '.••;■ 



