20 



Genera, Species. 



References. 



Forma- 

 tions. 



Localities. 



Discoidea, — contd. 

 rotula, Al. Brong. sp. 



subuculus, Klein, 



Pyrtna, Desmoulins. 



pyga?a, Desor, 



Dixoni, Forbes, 



conformis, Desor, 



Desmoulinsii, D'Arcli 



Prattii, Forbes, 

 minor, Agass. sp. 



Freuchenii, Desor, 



Hyboclypus, Agassiz. 

 ovalis, Wright, 

 caudatus, Wright, 



Galeopygus, Cotteau. 

 agariciformis, Forbes, 

 sp. 



Dysaster, Agassiz. 

 granulosus, Desmouh 

 sp. 



Galerites id. Env. d. Paris 



t. 9. f. 13. Pyrina id. 



Desm. ; Agass. Echin. 



Suiss. 1. 90. t. 6. f. 10-12. 



non D. rotula, McCoy. 

 20. t. 14. f. 57. Echinites 



id. Leske : Galerites id. 



Golclf . G. rotularis, Lamk. 



D. minima, Agass. Cat. 



Syst. 7. D. Fisum, Desor, 



Galer. 57. 



Mon. Galer. 29. t. 5.127-31. 



Galerites id. Agass. 



Echin. Suiss. I. 78. 1. 12. 



f. 3-6. Catopygus parvu- 



lus, Agass. Cat. rais. 100. 

 Mem. Geol. Surv. Gt. Br. 



Dec. I. t. 7. 

 Cat. rais. 100 : D'Orb. Pal. 



Fr. t. 973. f. 7-12. 

 Mem. Soc. Geol. Fr. 2. Ser. 



II. t. 13. f. 4. [Dec. V. 

 Mem. Geol. Surv. Gt. Br. 

 Nucleopijgus id. Cat. Syst. 7 : 



D'Orb. Pal. Franc. t. 988. 



f. 6-10. 

 Cat. Rais. 92. Syn. Echin. 



foss. 191. 



[t. 22. f. 1. 



Br. Foss. Echin. I. 301. 

 Ann. Nat. His. 1852. 100. 



t. 3.f. 2. Br. Foss. Echin. 



L 296. t. 22. f. 2. 



Hyboclypus id. Mem. Geol. 

 Surv. Gt. Br. Dec. IV. 

 t. 4. Desor, Syn. 168. Py- 

 gaster sub-lcsvis, McCoy, 

 Ann. Nat. His. 1848. 413. 

 Nucleolites decollatus, 

 Quenst. Petref. 585.t.50. 

 f. 6. 



4. Dysasteridce. 



Colly rites id. Desmoul. 

 Tabl. Syn. 364. ; Nucleo- 

 lites id. Mlinst. in Goldf. 

 t. 43. f. 4. ; Desor, Syn. 



Gault. 



u. Gr. 



Echin. Foss. 201. 

 f. 1-4. 



t. 36, 



Neoc. 



Ch. 

 u. Gr. 



u. Gr. 



1. Ch. 

 Hip. lm. 



u. Ch. 



Inf. Ool. 

 Brad. CI. 



Inf. Ool. 

 Gr. Ool. 



u, Jur. 



Tilquelle, Switz. 



Warminster, Wilts. 

 Blackdown, Devon. 

 Essen, Westphalia. 



Scheppenstedt, Bruns- 

 wick. 



Kent. 



Blackdown, Devon. 



Montiguies-sur-roc, 



Belgium. 

 England. 

 Martignes. 



Faxoe Island. 



Crickley Hill. 

 Bradford. 



Crickley Hill. 

 Cotteswold Hills. 

 Morrot. Rutland. 



Muggendorf, Bavaria. 



