OSTRACODA, V.—BARNEY. 
179 
3. Gy clast er ope 
Sub-Family 3.—ASTEROPINAE. 
Genus CYCLASTEROPE, Brady. 
. Cy chaster ope lobiancoi (Miiller). (Text-fig. 2.) 
If. 
Ut - //; ) Cyclasterope 
1 yclasterope Lobiancoi, id. 1912, p. 48. 
Stations 133 and 135 (North of New Zealand). 3 to 20 metres. Twenty-four 
specimens. 
Big. 2. _ Cyclasterope lobiancoi. A, Female. Right valve, X 6 ; B, Female, Stage II. Furca, x 65; 
C, Female, Stage III. Furca, x 65. 
The specimens are all females, and only one is mature. This is an immense 
specimen from Station 133, the right valve measuring 8 - 45 mm. by 7 • 7 mm. 
The surface of the valves is marked with short wavy lines, giving it a scaly appear¬ 
ance. The fureal spines are relatively shorter and stouter than in Muller’s figure, but 
in other respects this adult agrees well with his description. 
None of the young females has the cleaning foot developed, and the number of 
bristle-like post-furcal appendages is in all cases much less than nine. That they are 
developmental forms of C. lobiancoi is fairly certain ; for besides the fact that they were 
obtained in the same haul at Station 135, and were the only species taken there, they 
show a gradual advance towards the adult characters which can best be understood by 
considering two stages. These I call Stages II and III, using the terms with the same 
significance as Dr. Fowler has done (1909, p. 227), Stage II being the older. The 
characteristics of the adult are given for comparison. 
