PLATE LVII. 



Benthesicyrnus hrasiliensis (p. 332). 

 Fig. 1. Lateral view. 

 „ lbr. Section of a branchial plume. 



Benthesicyrnus pleocanthus (p. 334). 

 ,, 2. Lateral view. 

 „ 2br. Section of branchial plume. 



Benthesicyrnus iridescens (p. 335). 

 ,, 3. Lateral view. 

 „ 3a. Ophthalmopod. 

 ,, 3a". Diagrammatic section of eye. 

 ,, 3br. Branch of a branchial plume. 



