48 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 98 



somewhat stronger glabellar furrows. Likewise the dorsal furrows 

 are deeper, particularly toward the front, which causes the rim to be 

 more sharply upturned near the anterior angles. 



Locality 54s. 



Holotype.— U.S.N.M. No. 98535. 



KOOTENIA LIBERTYENSIS, n. sp. 

 Plate 9, figs. 7-9 



This species is represented by fragmentary material and is associ- 

 ated with Clavaspidella excavata. The cranidium assigned to it is 

 somewhat doubtful, as it lies next to a fragment of K. venusta and 

 may be representative of that species rather than of K. Hbertyensis. 

 The cranidium is selected because of its surface markings and smaller 

 size. The cranidium is characterized by a glabella, which is rounded 

 in front, a large upright occipital spine, and a narrow striated rim. 

 The anterior outline is considerably curved due to the rearward posi- 

 tion of the anterior angles. The pygidium has six marginal spines. It 

 is well fused, with the axis clearly defined and with the pleural grooves 

 faintly visible. The marginal furrow is wide and prominent because 

 of the change in slope. The spines are rather long and slender. The 

 higher parts of the surface are marked by irregular elongate 

 granulations. 



Locality 59c. 



Holotype and paratypes. — U.S.N.M. Nos. 98536a-c. 



KOOTENIA VENUSTA, n. sp. 



Plate 9, figs. 10, 11 



This species, associated with K. Hbertyensis, is represented by 

 fragmentary material. Only incomplete cranidia have been assigned 

 to the species, one of which is illustrated. Compared to K . Hbertyensis, 

 this cranidium has a long straight anterior margin. The glabella is 

 relatively wider and also flatter. The pygidium is characterized by 

 seven marginal spines, the rear pair of which are very small and close 

 to the median point. The other spines are long and slender. Fusion 

 has not completely eliminated the pleural grooves. Five axial rings 

 and terminal segments are well defined in the convex axis. The 

 anterior ring has a peculiar fold, possibly to be interpreted as an 

 incipient spine. Surface smooth, except on the marginal spines where 

 the usual scaly structure is developed. 



Locality 59c. 



Holotype and paratype. — U.S.N.M. Nos. 98537a, b. 



