34 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 128 



Plate 3 



Page 



Figs. 1-4. Eoptychoparia angustifrons Rasetti, new genus, new species 15 



I, 4, Small cranidia, X 5; U.S.N.M. No. 123866, paratypes. 2, 3, Dorsal 

 and lateral views of cranidium, X 3 (boulder B-4) ; U.S.N.M. No. 

 123865, holotype. 



Figs. 5-11. Eoptychoparia normalis Rasetti, new species 14 



5, 6, Cranidia, X3; U.S.N.M. No. 123864, paratypes. 7, Largest cra- 

 nidium, X 2; U.S.N.M. No. 123864, paratype. 8, 9, Frontal and dorsal 

 views of cranidium, X4; U.S.N.M. No. 123863, holotype. 10, 11, 

 Lateral and dorsal views of cranidium, X 3 (boulder B-6) ; U.S.N.M. 

 No. 123864, paratype. 



Figs. 12-15. Eoptychoparia intermedia Rasetti, new species 16 



12-14, Dorsal, frontal, and lateral views of cranidium, X S ; U.S.N.M. 

 No. 123867, holotype. 15, Cranidium, X S (boulder G-19) ; U.S.N.M. 

 No. 123868, paratype. 



Figs. 16-19. Onchocephaius sulcatus Rasetti, new species 17 



16, Cranidium, X4; U.S.N.M. No. 12387a, paratype. 17-19, Frontal, 

 lateral, and dorsal views of cranidium, X 4 (boulder G-41) ; U.S.N.M. 

 No. 123869, holotype. 



Fig. 20. Onchocephaius, species undetermined No. i 17 



Cranidium, X 4 (boulder M-io) ; U.S.N.M. No. 123871. 



Fig. 21. Onchocephaius, species undetermined No. 3 18 



Cranidium, X4 (boulder B-ii); U.S.N.M. No. 123873. 



Fig. 22. Onchocephaius, species undetermined No. 2 18 



Cranidium, X4 (boulder G-41); U.S.N.M. No. 123872. 



Fig. 23. Crassifinibra, species undetermined No. i 19 



Cranidium, X4 (boulder SS-i); U.S.N.M. No. 123874. 



Plate 4 



Figs. 1-7. Bicella bicensis (Resser) , new genus 26 



I, Cranidium, X 6. 2, Frontal view of same cranidium, X 4- 5, Cra- 

 nidium, X 4- 6, 7, Smaller cranidia, X6 (boulder O-i); U.S.N.M. 

 No. 123882, plesiotypes. 3, Cranidium, X 6. 4, Dorsolateral view of 

 same cranidium, X5 (boulder O-i); Laval Univ. No. 308a, plesio- 

 type. 



Figs. 8-10. Auslinvillia virginica Resser 23 



Dorsal, frontal, and lateral views of cranidium, X4 (boulder G-25) ; 

 U.S.N.M. No. 123878, plesiotype. 



Figs. 1 1 -1 5. Periomma gaspensis Rasetti, new species 25 



11-13, Dorsal, lateral, and frontal views of cranidium, X4 (boulder 

 G-24) ; U.S.N.M. No. 123880, holotype. 14, 15, Smaller cranidia, 

 X4 (boulder G-24); U.S.N.M. No. 123881, paratypes. 



Plate 5 



Figs. 1-8. Periommella yorkensis Resser 29 



I, Cranidium, X 10 (boulder G-24) ; U.S.N.M. No. 123883, plesiotype. 

 2-5, Frontal, lateral, dorsolateral, and dorsal views of cranidium, X 6 

 (boulder G-24) ; U.S.N.M. No. 123883, plesiotype. 6, Immature era- 



