RECENT BRITISH OSTRACODA. 



10- 



K 



faintly pitted or papillose, transversely sulcate near the middle, longitudinally rugose 

 on the ventral surface. Hinge-processes feebly developed ; left valve minutely crenul.it e. 

 Carapace of the male more elongate, superior margin slightly conea \ e. Colour yellow ish . 

 "One eye. Antennae short, last joint of the upper shorter than the preceding. Second 

 joint of the last pair of feet about equal to the united length of the two following joints, 

 terminal claw long and slender. Basal portion of the male copulative organs narrow 

 above, apical portion subtriangular. " 

 Length -^ in., height -^ in. 



Hab. Dredged in the Minch, 45-60 fathoms, and near Guernsey in ].")-.'50 fathoms {Mr. J. G. Jeffrey* 

 Roundstone Bay, 2-3 fathoms, and Northumberland coast, 45 fathoms {G. S. B.); Cumbrae [Mr. 

 D. Robertson) ; in shell-sand from Gal way {Prof. Rowney). 



The specific name ventricosa being preoccupied by Reuss, I have here adopted the 

 term cuneiformis, which I had applied to the species in MS. before seeing the work of 

 G. 0. Sars. 



13. Cythere limicola (Norman). (Plate XXXI. figs. 38 



Nat 



1. 



Cythere nodosa, Sars, loc. tit. p. 34. 



? 



complexa, Brady, Brit. Assoc. Report, 1866, p. 210. 

 areolata, Brady, Trans. Zool. Soc. vol. v. p. 381, tab. lxii. figs. 2a-d. 



Scandinavian type. Distribution : Recent— Baffin's Bay, Norway, Great Britain. Fossil— Glacial clay 

 and raised beaches, Scotland. 



Carapace short, tumid, quadrangular ; length to height as about three to two, not much 

 higher iu front than behind. Seen from the side, the anterior margin is well rounded 

 below and slopes very steeply backwards above, terminating in an elevated angle over 

 the anterior hinge. Posterior margin somewhat angular in the middle, slightly rounded 

 below, and sloping nearly in a right line upwards to the dorsum, its junction with winch 

 is marked by an angular projection; the dorsal margin, between this and the anterior 

 angle, is considerably hollowed. Ventral margin rather sinuous. The outline as seen 

 from above is hexagonally cuneate or boat-shaped, very broad behind, and tap 



K 



-ptly at each extremity; greatest breadth near the posterior extremity, equal to mor, 

 than half the length. End view triangular, with an excessively convex base; outh... 

 irregularly sinuous. Surface of the shell rugose, tuberculated, and marked with fine 

 dosely set puncta ; the general direction of the rug* is in curved transverse hnes ; bu 



most conspicuous elevation r 



longitudinally at a little di 



margin : there are two very large tubercles or nodules on the dorsal as,,,,, o ,,c h ; 

 n«r the posterior angle, "and one in the situation of the ?*«*»**"£* £ 



Wuish vellow - No eyes. Antenna, elongated, last joint of the upper elongate* 



>mea r , and somewhat shorL than the preceding ; third joint o the bwer antenn. ruo ■ 

 leader than usual. Feet slender and elongated; second jomt m ,1 c last , «r a 1 , t 

 Sorter than the united length of the two following, ternnnal daw long £"-£ 

 slight. Basal portion of the male copulative organs small and rounded, apical portion 



