1897.] NEW PALEOZOIC VERTEBRATA. 81 



Three of the scales are smaller than the one measured. Type F. 

 39, 40 ; Cotypes 6^, 64; 43, 44; 67, 68; 23, 24. 



This species is figured very imperfectly by Newberry as above 

 cited. His Fig. 13 presents a larger scale than any of this species 

 which I have seen. 



Sagenodus BROWNI.E, sp. nov. PI. I, Fig. 7. 



Represented by a single scale in excellent preservation. It 

 approaches the form of those of the S. quincunciatus , but has a 

 widely different sculpture. Scales as deep as long with truncate 

 undulate free margin, and broadly rounded proximal margin. 

 Minute longitudinal and no concentric stri^. Coarser sculpture, 

 consisting of subparallel lines which radiate from a short transverse 

 line near the proximal end to the proximal and distal margins, 

 which are connected by transverse lines, which are not continuous 

 with each other and hence not concentric. It follows that the 

 areas are parallelogrammic. The cross-lines disappear near the dis- 

 tal margin, leaving only the radiating sutures. 



This scale is wider in relation to its length than any of the species 

 except S. occidentalis and S. gurleianus, and is more broadly rounded 

 proximally, and more undulate distally than its ally, the .S". qidn- 

 cunciatus. The areation is coarser than in any other species and 

 of a unique pattern. 



Measurements, MM. 



Diameters of scale J ' 



[ longitudinal 21 



Three areas measured transversely in 3 



Type No. F. 13, 14. 



Sagenodus magister, sp. nov. PL I, Fig. 8. 



Founded on two scales which exceed in dimensions those of any 

 of the species here described. They differ somewhat in form, one 

 being slightly truncate at both extremities, while the other is more 

 regularly rounded. I regard the former as the type, but suspect 

 that they belong to the same species, as the sculpture agrees closely. 



There is the usual minute longitudinal striation ; besides, there 

 are no concentric lines, but a fine and irregular areolation extend- 

 ing over the entire surface, except in the type specimen for a short 

 distance at the distal margin ; in the other some of the coarse radii 



