116 On the Ostracoda of the Scilly Islands. 



Xestoleheris lahiata^ n. sp. PL IV. figs. 8-15. 



Carapace of iho, female^ as seen from the side, oblong, subtrl- 

 angular, highest near the middle ; height equal to rather more 

 than half tlie length : anterior extremity narrow, sharply- 

 rounded off; posterior wide, obtusely rounded : superior margin 

 well arched ; inferior nearly sti-aight, but produced downwards 

 towards the posterior extremity into a bulging prominence. 

 Seen from above the outline is broadly ovate, tapering rapidly 

 in front to an acute point, and very broadly rounded behind ; 

 greatest width equal to the height, and situated behind the 

 middle. The shell of the male seen laterally is more slender^ 

 and less tumid behind ; seen from above it is much more com- 

 pressed and widest near the middle, the posterior extremity 

 being somewhat narrowly rounded. The surface of the shell 

 is smooth, distantly studded with small elevated round papillae. 

 The chief peculiarity of the species, however, is a remarkable 

 labiate projection of the postero-inferior angle of the shell, 

 which is more distinctly visible on the right valve (fig. ]5). 

 Length V-o inch. 



Xestoleheris lahiata was dredged in New Grimsby Harbour 

 on a bottom of muddy sand, in a depth of about 14 fathoms. 



Cytherura fulva, n. sp. PI. IV. figs. 1-5. 



Carapace of the female very tumid ; seen laterally sub- 

 quadrate, broadly rounded in front, produced behind into an 

 obscure rounded subcentral beak : superior margin evenly and 

 very slightly rounded, sloping steeply backwards towards the 

 posterior extremity ; inferior nearly straight, sinuated in front 

 of the middle : greatest height situated in the middle and 

 equal to rather more than half the length. Seen from below 

 the outline is very broadly ovate, widest in the middle, the 

 width being somewhat greater than the height ; anterior 

 extremity broadly rounded, with a distinct central mucro, 

 posterior also broad, but tapering to a subacuminate central 

 point. Shell of the male seen laterally much more elongated, 

 with nearly straight dorsal and ventral margins, the height 

 equal to scarcely half the length ; the outline as seen from 

 below is also much more compressed. Surface of the shell 

 obscurely reticulated and dotted, marked also, especially on 

 the inferior surface, with faint longitudinal furrows. Length 

 T-u inch. 



C. fulva was dredged pretty abundantly on a bottom of hard 

 granitic sand, in a depth of 10-40 fathoms, off St. Mary's and 

 St. Agnes. 



