IMPERFECTLY-KNOWN SPECIES OF OSTRACODA. 447 



long setee, which are crowded together on the last four joints ; mandible slender and 

 feebly toothed (fig. 4) ; palp very long and slender, destitute of branchial rays, basal 

 joint bearing one extremely long and stout, falcate, plumose seta, and two much 

 shorter, simple setse; penultimate joint with two, last joint with three, small apical 

 setae. Length - 88 mm. 



Hab. One specimen only in a dredging from Lyttelton Harbour, 1-5 fathoms. 



Family CYTHERELLIDiE Sars. 



Genus Cytheeella Jones. 

 Cttheeella ebuenea, sp. n. (Plate XLVI. figs. 8, 9.) 



Shell, seen from the side (fig. 8), subelliptical, about twice as long as high; 

 extremities well rounded, dorsal and ventral margins nearly straight. Seen from above 

 (fig. 9), the outline is club-shaped, widest near the posterior extremity, width equal to 

 more than one-third of the length ; anterior extremity very obtusely rounded, posterior 

 much wider, subtruncate, with rounded angles ; lateral margins converging slightly 

 from behind to the anterior extremity. Surface of the valves quite smooth and 

 polished. Colour grey. Length *9 mm. 



Hab. Lyttelton Harbour, among weeds. One specimen only found. 



EXPLANATION OF THE PLATES. 



PLATE XLIII. 



Aster ope australis, p. 431. 

 Fig. 1. Shell of male, seen from left side, 

 Fig- 2. „ „ above, Q 



Fig. 3. Shell of female, seen from right side, i 

 Fig. 4. „ „ above, j 



Fig. 5. Inner branch of antenna, <5 , 



Fig 6 ? ' X 21 ° 



Fig. 7. Process of mandibular foot, X 180. 

 Fig. 8. Post-abdominal lamina, X 180. 



Asferope grisea, p. 432. 



Fig. 9. Shell of female, seen from right side,l 

 Fig. 10. „ „ above, J 



3n 2 



