REPORT ON THE OSTRACODA. 125 



of the male is smaller, much less tumid, and has its posterior portion compressed and 

 narrowly rounded. Length of the female, l-35th of an inch (75 mm.) ; of the male 

 l-42d of an inch ('65 mm.). 



The only dredgings in which I have seen this species are from Balfour Bay, Kerguelen 

 Island, 20 to 25 fathoms ; and from lat. 52° 4' S., long. 71° 22' E., 150 fathoms. It is to 

 be borne in mind, however, that the distinctions between this and the next species, if 

 valid at all, are very slight ; and it is not unlikely that the two may prove to be identical. 

 Xestoleheris depressa is a common species in the Northern Hemisphere, having been found 

 in the seas of Great Britain, Ireland, Norway, Spitzbergen, and in the Gulf of St Lawrence, 

 while as a Post-Tertiary fossil it occurs abundantly in Scotland, Ireland, Norway, and 

 Canada. 



In size the northern specimens agree with Xestoleheris setigera, while in shape they 

 approach more closely to the Balfour Bay specimens here assigned to chpressa. 



[PI. XXXI. fig. 1, a-g. a Carapace of female seen from left side, h from above, c 

 from below, d from front ; e carapace of male seen from left side, f from below, g from 

 front. All magnified 50 diameters.] 



2. Xestoleheris setigera, n. sp. (PI. XXXI. fig. 2, a~d, and fig. 3, a-c). 



Very closely similar to Xestoleheris depressa, but, when seen from the dorsal surface, 

 less tumid both in front and behind ; the width, also, is considerably greater than the height, 

 so that the end view is much depressed. The surface of the shell is studded with small 

 papillae, many of which bear single minute setae. Length, l-42d of an inch ("65 mm.). 



I have notes of the occurrence of this species as follows : — Off Christmas Harbour, 

 Kerguelen Island, 120 fathoms, specimen figured (fig. 3, a-c) ; off Heard Island, 75 

 fathoms, mud, Station 151 ; off Prince Edward's Island, 50 to 150 fathoms. 



[PL XXXI. fig. 2, a-d. a Carapace of male seen from left side, h from above, c 

 from below, d from front ; fig. 3, a-c, a female seen from left side, h from below, c from 

 front. All magnified 50 diameters.] 



3. Xestoleheris granulosa, n. sp. (PI. XXX. fig. 5, a-d). 



Carapace compressed, oblong ; seen from the side, subreniform, highest behind the 

 middle, height equal to more than half the length, extremities rounded off, the posterior 

 the broader of the two, dorsal margin well arched, ventral slightly sinuated in front of 

 the middle ; seen from above, compressed, ovate, twice as long as broad, widest near the 

 middle, subacuminate in front, rounded behind ; end view nearly circular, height slightly 

 exceeding the width. Surface of the sheU smooth, somewhat granular in appearance, 

 and sparingly papillose. Length, l-43d of an inch ('575 mm.). 



Taken off East Moncoeur Island, Bass' Strait, 38 to 40 fathoms, sand (Station 162) ; 

 Port Jackson, Australia, 2 to 10 fathoms. 



