Plate 91. 

 1-3. Argopatagus vitreus A. Ag. ; "Challenger" Station 191. 



1. Abactinal side of fragment about 48 mm. in length. 



2. Actinostome and surrounding plates of same fragment. 



3. Abactinal system of same fragment as fig. 1. 



4-7. Genicopatagus affinis A. Ag. ; "Challenger" Station 157. 



4. Actinal side of fragment 37 mm. in length. 



5. Same as fig. 4, seen from the abactinal side. 



6. Abactinal system of fig. 5. 



7. Anal system of same. 



