U. S. NATIONAL MUSEUM 



PROCEEDINGS. VOL. 89 PLATE 9 



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SPECIES AND SUBSPECIES OF OPISTHOCOELI U M (X 4). 

 1,0. {Opisthocoehps) excurrem: 2, O. (OpisthocoeUx) paradoxum paradoxum: 3, O (0.) p magnum: 4. 0.(0.) 

 simulant: 5, O. (Opisthocoelium) lamellicostatum lamellicostatum: 6, 0. (0.) mahuyense: 7. O. {Opisthocoiiops) 

 occuhum: S, 0. (Opisthocoelicum) opisihocoeU: 9. 0. {OpisthocoeUx) paradoxum gibhosum. 



