762 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



Plate 19. 



Proximal brachials of Antedon bifida. [After W. B. Carpenter.) 



Fio. 1098. — IBr,, proximal face. 

 1099.— Same, distal face. 

 1100. — Same, ventral face. 

 1101. — Same, dorsal face. 

 1102.— IBr, (axillary), disUil face. 

 1103. — Same, proximal face. 

 1104. — Same, ventral face. 

 1105. — Same, dorsal face. 



1106. — First brachial of the free undivided arm, proximal face. 

 llOT.-^Same, distal face. 

 1108. — Same, dorsal face. 

 1109. — Same, ventral face. 



Plate 20. 



Proximal brachials of Antedon bifida. (After W. B. Carpenter.) 



Fig. 1110.— Fifth brachial, distal face. 

 1111. — Same, proximal face. 

 1112. — Same, pinnule socket. 

 1113. — Same, ventral face. 

 1114. — Same, dorsal face. 



1115. — Brachial from about the middle of the arm, proximal face. 

 1116. — Same, distal face. 

 1117. — Same, lateral view. 

 1118. — Radial, articular face. 

 1119. — IKrj (axillary) of pentacrinoid .it time of detachment from larval column, external 



view. 

 1120. — Same, internal view. 



1121. — IBr, of pentacrinoid at time of det;ichinent from larval column, internal view. 

 1122. — Same, external view. 



Plate 21. 



I'ro.Timal brachials of Comanthns parvicirra. {After P. Jl. Carpenter.) 



Fig. 1123.— IBr,, distal face. 



1124. — Same, proximal face. 



1125. — Same, ventral surface. 



1126. — Same, dorsal surface. 



1127. — IBfi (first axillary) proximal face. 



1128.— Same, distal face. 



1129.- — Same, ventral surface. 



1130. — Same, dorsal surface. 



1131. — IBr, of another variety, distal face. 



1132. — Same, proximal face. 



1133. — Same, ventral surface. 



1134. — Same, dorsal surface. 



1135. — IBr: (first axillary) of another variety, proximal face. 



1136.— Same, distal face. 



1137. — Same, ventral surface. 



1138. — Same, dorsal surface. 



