320 BISCAYAN PLANKTON: THE OSTEACODA. 



Plate 19. 



CoNCHfficiA HADBONi, Brady and Norman. 



Male. Stage I. Fig. 74. Inner branch of antenna ii., 2'1 mm. 



Stage III. 76. Frontal organ, and part of antenna i., 10 mm. 



77. Inner branch of antenna ii., 1"0 mm. 



Female. Stage I. 78. Shell, 2-8 mm. 



Stage 11. 79. Shell, 16 mm. 



80. Frontal organ, and part of antenna i., I'Gtmm. 



81. Inner branch of antenna ii., 1"6 mm. 

 Stage III. 82. Shell, TO mm. 



83. Frontal organ, and part of antenna i., 1"0 mm. 



84. Inner branch of antenna ii., 1"0 mm. 

 Stage IV. 85. Shell, 0-7 mm. 



86. Frontal organ, and part of antenna i., 0"7 mm. 



87. Inner branch of antenna ii., 0'7 mm. 

 Stage V. 88. Shell, 0-4 mm. 



89. Frontal organ, 04 mm. 



CoNCHCECIA HYALOPHYLLU.M, ClaUS. 



Male. Stage 1. Fig. 90. Shell, 2'3 mm. (%jAm-« stage). 



91. Frontal organ, 2'3 mm. 



92. Inner branch of ri^'ht antenna i., 2'3 mm. 

 Sta^e II. 93. Shell, 1'5 nmi. [hijulophyllum %t:x^e). 



94. Frontal organ, 1*5 mm. 



95. Inner branch of right antenna i., 1"5 mm. 



96. Hook and surrounding structures of left antenna i. 

 98. Shell, 1-1 II. ni. 



100. Shell, 0-7 mm. 



101. Frontal organ, 07 mm. 

 Female. Stage I. 102. Shell, 2-5 mm. {lojjhuru stage). 



105. Shell, 1-7 nmi. [hyaloplfjllum stage). 

 108. Shell, 1-0 mm. 



