8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 97 



ALOKISTOCARE NOTATUM, n. sp. 



Plate I, fig. 43 



This species departs considerably from the norm of the genus be- 

 cause of its convexity. The test is finely granulated, and only a nar- 

 row rim is differentiated by the upturned edge. 



Locality 37n. 



Holotype. — U.S.N.M. no. 95033. 



ELRATHIA Walcott, 1924 

 ELRATHIA IDAHOENSIS, n. sp. 



Plate I, figs. 36-40 



A fullness in all parts of the cranidium characterizes this species. 

 It is typical of the genus in all respects. The thorax has about 15 

 segments. 



Locality 37n. 



Holotype and paratypes. — U.S.N.M, no. 95034. 



ELRATHIA SAMPSONI, n. sp. 



Plate I, figs. 31, 35, 58 



Several cranidia of various sizes are illustrated, thus presenting the 

 characteristics of the species. Compared with E. idahoensis, the spe- 

 cies is somewhat narrower at the eyes, and the glabella is also tapered 

 more. 



Locality 37m. 



Holotype and paratypes. — U.S.N.M. no. 95035, 



ELRATHIA LONGICEPS, n. sp. 



Plate I, fig. 50 



Compared with E. samps oni, this species has a longer glabella and 

 relatively shorter brim; also, the brim is divided more nearly equally 

 between the rim and preglabellar area. 



Locality 37m. 



Holotype. — U.S.N.AI. no. 95036. 



GLOSSOPLEURA Poulsen, 1927 

 GLOSSOPLEURA INTERMEDIA, n. sp. 



Plate I, fig. 56 



Several pygidia, libragenes, and two incomplete hypostomata, but 

 no cranidia, were found in the shale collections. One pygidium is 



