332 BISCATAN PLANKTON: THE OSTRACODA. 



Plate 25. 



CONCHCECIA SPIMKOSTRISj ClauS. 



Male. Stage I. Fig. 236. Shell, 1-3 mm. 



Stage II. 239. Shell, 1-0 mm. 



Female. Stage II. 243. Shell, 1-2 mm. 



Stage III. 245. Shell, O"? mm. 



CoNCHCECIA ZKTESIOS, Sp. 11. 



Female. Stage (?)1. Fig. 247. Shell, 2-4 mm. 



248. Frontal organ, and end of antenna i., 2'3 mm. 

 24'J. Frontal organ, from another specimen, 2'4 mm. 



250. Part of dorsal bristle, 2'3 mm. 



251. Inner branch of antenna ii., 2 5 mm. 

 Stage (?) II. 252. Shell, 1-5 mm. 



253. Frontal organ, 1-5 mm. 



CO.N'CHCECIA B. 



Fig. 254. The right shell, 1"7 mm. 



255. The left shell. 



256. Frontal organ, and ])art of antenna i. 



257. Inner joint of antenna ii. 



(^ONCHffiCIA C. 



Fig. 258. Shell, l"! mm. (rostrum slightly "restored"). 



259. Frontal organ. 



260. Pad on accessory bristle of antenna i. 

 201. Inner branch of right antenna ii. 

 262. Inner branch of left antenna ii. 



IIalocypkis globosa, Clans. 



Male. Stage I. Fig. 203. Shell, 2-1 mm. The " pecked "' line completes what 



is believed to be the natnral contour. 



