Bull. U. S. F. C. 1899. (To face page 492.) 



Plate XVII. 



f#l|$S^:f 



w 



Vi0M, 208 



m5 



20-i. C'HcuUmui^ plobottns Zeder, from Lophms pii<caioriiis. Posterior 



fud of miilu. X tin. 

 20ti. Lateral Wew of posterior end of male from Gadus caUariaa. 



X 200. 



207. CdcuUanus sp. from Fmtdulus heteroditus. Posterior end of 



male, lateral view; life, x 300. 



208. Ventral view of po^^te^io^ extremity, x 300. 



