PLATE XLV— Continued. 
Nucula Randalli. 
Page 315. 
See Plate 93. 
Pigs. 6, 9. Right and cardinal views of a specimen. 
Fig. 10. An enlargement of the left side of the preceding. 
Figs. 7, 8. Right and left views of another specimen. 
Fig. 16. An enlargement from the preceding. 
Fig. 23. A cardinal view of a specimen enlarged. 
Hamilton group. Shore of Seneca lake, N. Y. 
Fig. 26. The left side of a cast showing muscular scars and pallial line. 
Fig. 27. The cardinal view of the same showing muscular scars and hinge crenulations. 
Hamilton group. Cumberland, Md. 
Nucula diffidens. 
Page 322. 
Fig. 12. A cast of a left valve showing muscular seal's and surface strife. 
Lower Chemung group. Ithaca, N. Y. 
Fig. 14. A left valve imperfectly preserved, showing surface striae and posterior muscular scar. 
Lower Chemung- group. Ithaca, N. Y. 
Nucula lamf.llata. 
Page 320. 
See Plates 51, 93. 
Fig. 13. An enlargement of a left valve of this species, imperfectly represented. 
Lower Chemung- group. Ithaca, N. Y. 
Nucula Houghtoni. 
Page 323. 
Fig. 29. A partial cast of a right valve showing- the exterior markings. 
Fig. 30. A gutta-percha impression from a cast of a left valve, showing hinge crenulations, muscular scars 
and pallial line. 
Waverly group. Newark, Ohio. 
Fig. 31. The cast of the interior of a left valve enlarged, showing muscular scars, pallial line, hinge crenu¬ 
lations and cartilage pit. 
Waverly group. Newark, Ohio. 
Nucula subelliptica. 
Page 317. 
Fig. 28. A cast of a right value, natural size, showing muscular scars. 
Hamilton group. Cumberland, Md. 
