634 Brady and Norman — Monograph of the Marine and Freshwater Ostracoda 



2. Asterope elliptica, Philippi. 



(PI. Lii., figs. 16, 17 ; PI. Lix., figs. 19, 20.) 



1840. Asterope elliptica, . . "Archiv. f. Naturgesch.," p. 188,pl.iii.,figs. 9-11, ? . 



Translated " Ann. & Mag. Nat. Hist.," vol. vi., 

 1840, p. 94, pi. iii., figs. 9-11. 



1887. „ „ Sars, G. 0., " Nye Bidrag til Kunds. om Middelh. 



Invertebratfauna : iv. Ostracoda Mediterranea," 

 Archiv. for Mathem. og Naturvid., p. 28, pi. i., 

 figs. 1-4 ; pi. iv., cJ , ? . 



Shell in female (PL lii., fig. 16, 17) elliptical, well rounded at the extremities, 

 height equal to half the length, ventral margin very slightly arcuate, dorsal rather 

 more arched, anterior two-thirds of shell higher than posterior thii-d, in this respect 

 differing from A. marice; antennal sinus below the middle of the front, and opening 

 more downwards than in A. marice, the rostrate anterior process overhanging it. 

 Seen from above, the greatest width is central, and the ends nearly equal. The 

 shell of the male, according to Sars, is both higher and broader in front than 

 behind, dorsal margin irregularly curved ; posterior extremity obtusely truncated ; 

 anterior above the antennal sinus somewhat cut away. In the female the anten- 

 nules (PI. Lix., fig. 19) have the third joint much shorter than the fourth, its 

 distal margin concave, so that it is longer above and below than in the middle ; 

 the terminal nail is long and slender, subequal to the last two joints in length. 

 The mandibular palp (PI. lix., fig. 20) not only has the peculiar spines of the infero- 

 anteal lobe distinctly trident-formed at the extremity, but also spined or serrated 

 on the margin of the stalk; the appendage at the end of the second joint is two- 

 thirds as long as the third joint; the terminal unguis is long and slender, sub-equal 

 in length to the last two joints. Caudal ungues eight pairs. Length of female, 

 1*5 mm. 



Sars says that the terminal nail of the appendicular branch of the antennae in 

 the male — which we have not seen — is scarcely more than half the length of the 

 preceding joint, and boldly curved in the middle. 



Habitat.— OS Valentia, Ireland, 1870 (A. M. N.). 



Distribution. — Fosse de Cap Breton (Marquis de Folin). Palermo, Sicily 

 (Philippi). Messina, 10-20 fathoms (G. O. Sars). 



