50 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 98 



The small cranidium, which is illustrated, has a forward expanding 

 glabella but is otherwise normal. 

 Locality 54s. 

 Holotype and paratype. — U.S.N.M. Nos. 98540a, b. 



KOOTENIA BEARENSIS, n. sp. 



Plate 10, figs. 22, 23 



This species is founded on the pygidium. It has five spines, for 

 which reason it resembles K. convoluta. It differs from that species 

 because of its nearly smooth test. The marginal spines are long and 

 the third pair is quite large. 



Locality 19X. 



Holotype.— U.S.N.M. No. 98541. 



KOOTENIA PECTENOIDES, n. sp. 



Plate 9, figs. 12, 13 



The species is known only from the pygidium. It belongs to the 

 K. serrata group. Fusion is carried to the extreme, so that the pleural 

 grooves are eliminated and the pleural furrows shallow. The five 

 marginal spines are blunt but terminate in sharp points. 



Locality 55q. 



Holotype.— U.S.N.M. No. 98542. 



KOOTENIA BREVISPINA, n. sp. 



Plate ii, figs. 1-4 



This is a large species represented by four pygidia. An incomplete 

 cranidium has been placed with these pygidia, but it is too imperfectly 

 preserved to illustrate. 



The pygidium is characterized by a wide stout axis and great con- 

 vexity. Only a few segments are visible on the axis and pleural lobes. 

 The pleural grooves are completely eliminated, and the pleural furrows 

 are shallow but broad, terminating in the broad shallow marginal 

 furrow. There are six short marginal spines, which give the pygidium 

 a serrate edge. Fine granulations occur in the elevated portions, and 

 as usual the marginal spines are scaly. 



Owing to the blunt marginal spines this species resembles K. 

 pectenoides. 



Locality 54s. 



Holotype and paratype. — U.S.N.M. Nos. 98543a, b. 





