REPORT ON THE OSTRACODA. 43 



The figures of Cijtherina acuminata, given by Eeuss {loc. cit.), though somewhat more 

 slender, are very near to the present species in general character. Indeed, had Reuss's 

 drawings referred to a recent species, there need have been no hesitation in saying that 

 our shells belonged to the same, but as Cytherina acuminata is a chalk-marl species, and 

 is stated to be only 7 mm. in length, it seems best to regard its identity as, at any rate, 

 not proven for the present. The Challenger specimens are from near Booby Island, lat. 

 10° 36' S., long. 141° 55' E., 6 to 8 fathoms (Station 187), and (?) from Humboldt Bay, 

 Papua, 37 fathoms. The type specimens, described in Les Fouds de la Mer, are from 

 Batavia and other stations in the Malay Archipelago. 



[PI. 11. fig. 4, a-d. a Carapace seen from left side, h from above, c from below, d from 

 front. Magnified 50 diameters.] 



5. Macrocypris setigera, n. sp. (PI. I. fig. 1, a-d). 



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

 less than half the length ; extremities rounded, the anterior the broader of the two ; 

 dorsal margin boldly arched, high in the middle, ventral nearly straight ; seen from above, 

 ovate, nearly thrice as long as broad, widest in the middle, and only slightly tapering 

 towards the very broadly rounded extremities ; end view nearly circular. Shell smooth, 

 bearing a few small scattered setse towards the extremities. Length, l-20th of an inch. 



Found only in a dredging made at Port Jackson, in a depth of 2 to 10 fathoms. 

 The specimens being only empty shells, I have no means of verifying the generic 

 reference, so that the position here assigned to the species must be understood as purely 

 provisional, 



[PI. I. fig. 1, a-d. a Carapace seen from left side, h from above, c from below, d from 

 front. Magnified 40 diameters.] 



6. Macrocypris tumida, n. sp. (PI. VI. fig. 2, a-d). 



Shell oblong, tumid, subovate ; seen laterally the anterior extremity is broadly 

 rounded, the posterior obliquely rounded, produced and obscurely angular below ; dorsal 

 margin boldly and evenly arched, highest in the middle ; ventral straight ; height equal 

 to half the length ; seen from above the outline is broadly ovate, widest in the middle, 

 and tapering very slightly towards the extremities, which are broadly rounded ; the 

 anterior slightly mucronate, width equal to the height ; end view nearly circular. Shell- 

 surface smooth. Length, l-16th of an inch (r55 mm.). 



A very fine and well-marked species, found in a dredging from a depth of 28 fathoms, 

 in Royal Sound, Kerguelen Island (Station 149), and from Wellington Harbour, New 

 Zealand, in tow-net at trawl. 



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

 front. Magnified 30 diameters.] 



