60 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 98 



POULSENIA BEARENSIS, n. sp. 



Plate 13, figs, s-8 



Possibly this cranidium should have been referred to Kochaspis. 

 Abundance of granulation, however, and the relief created by deep 

 furrows weigh more heavily in favor of Poidsenia. None of the 

 specimens is perfect, but the major features are well shown. 



The rather long glabella tapers to a rounded front. Dorsal furrow 

 deep. Three pairs of recurved glabellar furrows are deeply impressed. 

 Brim divided into a slightly convex preglabellar area and a somewhat 

 narrower thickened rim. Longitudinally the head is very convex. 

 The fixigenes, which average nearly as wide as the glabella, rise from 

 the dorsal furrow and then flatten out to the prominent eye. Eye lines 

 heavy. Surface very granulose, with added vertical striations on 

 preglabellar area. 



Locality 19s. 



Holotypc and paratype. — U.S.N.M. Nos. 98562a, b.. 



EHMANIELLA Resser, 1937 



EHMANIELLA MALADENSIS, n. sp. 



Plate 12, figs. 17-23 



The cranidia here described are not easily distinguished from the 

 several associated species of Kochina. Ehmaniella seems the best 

 generic reference for the species. 



The slightly tapered glabella is rather slender and has a nearly 

 circular outline in front. Three pairs of glabellar furrows are visible 

 in proper light, and some specimens show a keel. The glabella does 

 not rise much above the dorsal furrow. Longitudinally the glabella 

 has little convexity except in the front lobe. The fixigenes are wider 

 than the glabella and only gently convex. Posterolateral limbs are 

 stout. The brim consists of a large preglabellar area and a thickened 

 rim. There is a tendency to form a boss in the preglabellar area. 

 Some exfoliated specimens show scattered granules. Both the speci- 

 mens with and without the test have the preglabellar area and the 

 fixigenes anterior to the eye lines strongly marked with vertical 

 anastomosing lines. 



Locality 54s. 



Holotype and paratypes. — U.S.N.M. Nos. 985633-6. 



PACHYASPIS, n. gen. 



A very common species represents the median trilobite form in the 

 collections from Two Mile Canyon. Comparison with described 



