324 



BISCAY AN PLANKTON : THE OSTEACODA. 



Plate 21 



CONCHCECIA LOllICATA, ClaUS. 



Male. Stage I. Fig. 127. Shell, 2'4 mm. {ctenophora stage). 



Stage II. 130. Shell, I'S mm. [loricata stage). 



Stage III. 131. Shell, 1-4 mm. (autero-dorsal region slightly distorted, owing to 



repeated opening). 



Female. Stage I. 134'. Shell, 2'6 mm. [ctenophora stage). 



Stage II. 136. Shell, 2-0 mm. [loricata stage). 



Stage III. 137. Shell, 1-2 mm. 



Male. 



Female. 



Stage 



Stage ir. 

 Stage III. 

 Stage I. 

 Stage II. 



Stage III. 



CoNCHCECiA MAGNA, Clans. 



I, Fig. 139. Shell, B'O mm. [macrocheira stage). 



140. Frontal organ, 2"8 ram. 



141. Armature from about the middle of the toothed part of the principal 



bristle of antenna i., 2*9 mm. 



142. Hook of antenna ii., right side, 2'8 mm. 



143. Central l)ristles of the inner branch of antenna ii.; the hairs were very 



long, but are much foreshortened, 2*8 mm. , 



144. Shell, 1'8 mm. [magna stage). 

 149. Shell, 1-3 mm. 



151. Shell, 3'3 mm. [macrocheira stage). 

 154. Shell, 1*9 mm. (inagna stage). 

 158. Shell, 1-2 mm. 



The a Larv^. 



Male. Stage IV. Fig. 161. Shell, 0-9 mm. 

 Female. 164. Shell, 0"9 mm. 



Male. Stage V. 166. Shell, 0-5 mm. 



