PLATE XLV. 



Figures magnified 500 diameters. 



Figs. 1, 2. PLAGIOGRAMMA PULCHELLITM, Grev.; M. .T., 1S50, p. 20!>, 10, t. 



-1-6; Pi-it., 774, 4, f. 32. Costae are beaded. 

 Cal. Guano. 



Fig. 3. PULCHELLUM, a very large specimen. 



Figs. 4, 5. DIMMEREGRAMMA MARiNTiM, Ralfs.; Prit.,p. 790; V. H.,36, f.9. 

 " 6,7. PLAGIOGRAMMA PYOMAEUM, Grev.; M. J., 1859, p. 210, 10, f. 



11. Camp. Bay. 

 8, 9. VALIDUM, Grev.; M. J., 1859, p. 209, 10, f. 8, Cal. 



and Camp. Bay. 



10, 11. GREGORIANUM, Grev.; M. J., 1859, p. 208, 10, f. 



1,2; Jan. and Rab., p. 10, 2, f. 8. Costae 

 are beaded. Mobile. 

 12 14. OBKSUM, Grev. ; M. J., 1859, p. 211, 10, f. 12, 13. 



Charleston. 

 15. SPINOSTJM, Cleve. ; N. L. K. D., p. 18, 4, f. 55. 



Camp. Bay. 

 Kigs. Hi, 17. <'AI,IFORNKTM, (irev.; M. J., 1S59, p. 211. 1 D, f. 



15-17. (Striae monililorm.) 



is, 19. TKSSELLATUM, Grev. ; M. J., 1859, p. 208, 10, 1'. 7. 



Fig. 20. ORNATUM, Grev. ; M. J., 1859, p. 209, 10, f. 9; Y. 



H., 36, f. 3. Costae moniliform as in all of 

 this genus, H. L. S. 

 Figs. 21, 22. GLYPIIOPKSMIS DISTANS, V. H.; 36, f. 15, 16; Dimeregramma, 



Greg. 

 2:'.. 2k \VII,].IAMSONII, W. S.; V. II., :',6, f. 14. 



