RECENT BRITISH OSTRACODA. 



429 



examples that I have seen. Its position in the genus Cytheridea must he considered 

 merely provisional. 



8. Cytheridea (?) subflavescens, Brady. (Plate XXXIV. figs. 53-55.) 

 Cythere subflavescens, Brady, Brit. Assoc. Report, 1866, p. 210. 



Carapace, as seen from the side, subtriangular, highest in the middle ; greatest height 

 equal to rather more than half the length ; extremities rounded, anterior broad, posterior 

 somewhat narrowed ; superior margin well arched, highest in the middle, v/here it is 

 obscurely angular, inferior slightly convex. Outline, as seen from above, ovate, pointed 

 in front, rounded behind; greatest width in the middle, scarcely equal to half the length. 

 Surface smooth, finely and closely punctate, very slightly pubescent; colour yellowish. 

 Animal unknown. 



Length -^q in. 



Hab. The Mincli, 45-60 fathoms [Rev. A. M. Norman). 



One specimen only of this species was found, by Mr. Norman, in sand dredged amongst 

 the Hebrides in 1866. 



Genus 4. Eucythere, Brady. 

 [Cytheropsis, G. O. Sars*.) 



Carapace high and compressed in front, lower and more tumid behind. Shell thin, 

 pellucid, and marked with conspicuous round white papillae. Hinge-joint formed on the 

 right valve by a projecting flange or crest, which is received into a corresponding depression 

 of the left valve. " Superior antennae five-jointed, and in structure almost like those of 

 Cythere ; inferior much more robust, four-jointed ; flagellum (urticating seta) long. 

 Mandibular palp three-jointed ; branchial appendage very small. Cutting portion of the 

 first maxillae weaker than usual ; internal segment rudimentary. Second pair of maxillae 

 very large, dilated in an extraordinary manner at the apex, flabelliform, and beset with 

 numerous apical setae. Feet weak and slender, subequal ; terminal claws long and almost 

 straight, alike in tke male and female. Copulative organs of the male unusually small. 

 One eye." 



Though one species of this genus, E. decUvis, is tolerably common on the British coast, 

 I have never yet obtained specimens in such a state of preservation as to allow of the 

 examination of the animal. A deficient supply of specimens has also prevented Sars 

 from making a very accurate investigation of the anatomical structure ; but there would 

 seem to be little doubt that there is quite sufficient peculiarity in the shell and internal 

 parts to constitute a distinct genus. 



* The name Cytheropsis, having been already used by M'Coy in the ' Systematic Description of the British Palte- 

 ozoic Fossils in the Geological Museum of the University of Cambridge,' 1855, it is necessary to substitute another 

 name for this genus. 



