OSTRACODA, V.— BARNEY. 



179 



Sub-Family 3.— ASTEROPINAE. 



Genus CYCLASTEROPE, Brady. 

 3. CyclasterojM lobiancoi {M.\x\\(ti). (Text-jfig. 2.) 



ajUndroleheris LoUancoi, Miiller, 1894, p. 220, pi. IV, figs. 40, 42, pi. V, figs. 2, 3, 26, 32, 34, 40. 

 Cijdasterope LoUancoi, id. 1912, p. 48. 



Stations 133 and 135 (North of New Zealand). 3 to 20 metres. Twenty-four 

 specimens. 



Fig. 2. — Gyclaslerope lohiancoi. A, Female. Right valve, X Q ; B, Female, Stage 11. 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 furcal spines are relatively shorter and stouter than in Miiller's fio-ure, 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. lobiancol 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. 



