PLATE LXX. 



Figures magnified 501) diameters. 



Figs. 1, 2. CAMPYLODISCUS CRIBROSUS, W. S., S. B. D., 7, f. 55; A. N. H., 



1851, 1, f. 3. 



Fig. 3. " HODGSONII, S. B. D., 6, f. 63; Schm. At., 53, 



f. 5. Same as Camp. Imperialis, Grev. ; 

 Schm. At., 52, f. 7; 53, f. 6-7. Figs. 15, 16, 

 are probably only vars. of Hodgsonii. 



" 4. " SAMOENSIS, Grun. ; Schm. At., 15, f. 18-20. 



Figs. 5, 6, 7. " ARGUS, Bail. M. O. p. 39, 2, f. 24, 25. Hudson 



River. 

 " 8, 9. " PARVULUS, W. S., S. B. D., 6, f. 56; Prit., p. 



801, 15, f. 22, 23; V. H., 77, f. 2. 

 " 10,14. " LIMBATUS, Breb.; Schm. At., 17, f. 1-3; Grun., 



1862, p. 440, 9, f. 4. 

 Fig. 11. " RADIOSUS, Ehrb.; E. Amer., p. 122, 3, 7, f. 14: 



K. B., 28, f. 12. Of dubious value. 



" 12. HUMBOLPTII, Ehrb. Abh., 1862, E, f. 3. 



13. MEXICANUS, Ehrb. Abh., 1872, 25, f. 19. 



" 15. " MARGIN ATUS, Johnst. M. J., 1860, p. 12, 17, 1, 



f. 11; T. M. S., 1860, p. 30, PI. 1, f. 2. Cal. 



" 16. " SAMOENSIS, Schm. At., 19, 20. Compare Fig. 



4. The latter two appear closely allied to 

 C. Hodgsonii, Fig. 3, probably merely va- 

 rieties. 



