306 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



Descriptions of genera and species — Continued. page 



Maryvillia, new genus 400 



Maryzrillia arion, new species (pi. 64, figs. 4, 4a-c) .... 400 

 Maryznllia ariston, new species (pi. 64, figs. 5, sa) .... 401 



Family Olenidse 401 



Marjumia, new genus 401 



Marjumia callas, new species (pi. 65, figs. 3, 3a-^). ... 402 



Marjumia typa Walcott (pi. 65, figs. 4, ^a-b) 402 



Lisania Walcott 4^3 



Lisania ? hrcvxloha, new species (pi. 66, figs. 3, Z^-'c) ■ ■ ■ 4^4 



Family Illaenidse Corda 404 



Illcrnurus Hall 404 



Illcenurus quadratus Hall (pi. 45, figs, i, \a-e) 406 



Family Mesonacidae Walcott 406 



Mesonacis Walcott 406 



Mesonacis gilbcrti (Meek) (pi. 45, fig. 3) 406 



Order Proparia Beecher 407 



Family Eodiscidae Raymond 4°/ 



Pagetia, new genus 407 



Pagetia bootes, new species (pi. 67, figs, i, \a-f) 408 



Pagetia clytia, new species (pi. 67, figs. 2, 2a-e) 408 



New formation names 409 



Chisholm shales 409 



PLATES 



45. Illcrnurns quadratus Hall, Mesonacis vermontana (Hall), and Me- 



sonacis gilberti (Meek) 412 



46. Bathyuriscus {Poliella) powersi Walcott, Bathyuriscus haydcni 



(Meek), Bathyuriscus {Poliella) occidentalis (Matthew), Bathy- 

 uriscus ornatus Walcott, Bathyuriscus {Poliella) anteros Walcott, 

 Bathyuriscus {Poliella) primus (Walcott), Bathyuriscus sp. undt. 

 (i), and Bathyuriscus {Poliella) caranus Walcott 414 



47. Bathyuriscus hozvelli Walcott, Bathyuriscus rotundatus (Rominger), 



Bathyuriscus adceus Walcott, and Bathyuriscus {?) bithus Wal- 

 cott 416 



48. Bathyuriscus anax Walcott, Bathyuriscus atossa Walcott, Bathyuriscus 



{Poliella) sylla Walcott, and Bathyuriscus batis Walcott 418 



49. Bathyuriscus {Poliella) balus Walcott, Bathyuriscus batitius Walcott, 



Bathyuriscus sp. undt. (i), and Bathyuriscus manchuricnsis Wal- 

 cott 420 



50. Bathyuriscus belesis Walcott, Bathyuriscus belus Walcott, and Dolicho- 



metopus suecicus Angelin 422 



51. Dolichometopus toiitoensis Walcott, Dolichomeiopus baton Walcott, 



and Dolichometopus ? bessus Walcott 424 



52. Dolichometopus boccar Walcott and Dolichometopus bion Walcott. . . . 426 



53. Dolichometopus acadicus Matthew, Dolichometopus productus (Hall 



and Whitfield), and Dolichometopus ? expansus (Walcott) 428 



54. Dolichometopus {?) deois Walcott, Dolichometopus {?) alceste Wal- 



cott, Dolichometopus {?) derceto Walcott, and Dolichometopus 



( f) dirce Walcott 430 



