REPORT ON THE OSTRACODA. 109 



[PL XVIII. fig. 2, a-d. a Shell seen from left side, b from above, c from below, d 

 horn front. Magnified 50 diameters.] 



82. Cythere scutigera, G. S. Brady (PI. XXII. fig. 5, a-f). 



Gytliere scutigera, Brady, Les Fonds de la JMer, torn. i. p. 70, pi. \'iii. figs. 15, 16. 



Shell of the female, seen from the side, oblong, subquadrangular, scarcely higher in 

 front than behind, height equal to half the length ; anterior extremity rounded, and 

 divided below the middle into a number of short and stout blunt teeth ; posterior 

 (^xtremity obliquely rounded, the lower angle rounded off ; dorsal margin sloping slightly 

 Ijackwards, and broken by numerous large strong spines ; ventral margin almost straight ; 

 seen from above, irregularly ovate, twice as long as broad, the margins very irregular and 

 broken, extremities equal, broad and truncated ; end view irregularly hexagonal, mdth 

 and height equal. The male is much more elongated and slender, as well as more sharply 

 spinous. The valves are armed with several large shield-like circular bosses which are 

 more or less spinous at the summit, and the rest of the surface is closely beset with spines 

 or spiniferous tubercles. Length, l-48th to l-24th of an inch ('52 to I'l mm.). 



Specimens which I take to belong to Cythere scutigera were dredged in several places, 

 all, however, in the Eastern Archipelago, Amboyna, 15 to 20 fathoms (Station 163) ; in 

 lat. 39° 32' S., long. 171° 48' E., 150 fathoms (Station 167) ; in Humboldt Bay, Papua, 

 37 fathoms; and in lat. 33° 42' S., long. 78° 18' W., 1375 fathoms (Station 300). 



The type specimens described in Les Fonds de la Mer, and taken off the north of 

 Java, are much more strongly marked in their spinous armature than any of those found 

 in the Challenger dredgings, but the general character of the shells is closely similar. 



[PI. XX. fig. 5, a-f. a Left valve of male (Amboyna) seen from side, h from above 

 (both magnified 40 diameters) ; c shell of female (Station 167), seen from left side, d from 

 above, e from below, y from front (magnified 50 diameters).] 



83. Cythere clavigera, n. sp. (PI. XXIII. fig: 7, a-d). 



Cythere siibcoronata, Brady, Trans. Zool. Soc, vol. v. p. 384, pi. Ix. fig. 9, a-e. 

 Shell, seen from the side,- ovate, oblong, greatest height situated in front of the middle, 

 and equal to half the length ; anterior extremity boldly rounded, completely bordered 

 with a series of short and broad blunt sj)ines, j)osterior extremity narrower, and likewise 

 beset with spines, much longer and stronger than those of the front ; dorsal margin 

 sloping rather steeply backwards, and broken by a series of five or six spines of irregular 

 size, one conspicuous spine just behind the anterior hinge-tubercle ; the dorsal margin is 

 nearly straight, but is also broken by continuous and irregular tooth -like projections ; seen 

 from above the outline is compressed, ovate, more than twice as long as broad, and having 

 its greatest width in the middle ; extremities broadly truncated, the whole outline much 



