PLATE 40. 
Page 
Fig. 1 a - p. Merista ( - Meristella) bella. 
1 a -h. Dorsal, ventral, profile, front, and cardinal views of joung shells. 
1 i. k, l. Views of a larger specimen. The species rarely attains a larger size than these figures. 
1 m-p. Views of an unusually large specimen of this species. 
Fis. 2 a, b. Rensselagria i,.*vis. 
o a , b. Dorsal and profile views of a specimen of this species. 
Fin. 2 c -/, & 3 a - d. Merista ( = Meristella) subquadrata. 
2 c, d. e,f. Dorsal, ventral, profile, and front views of a young individual. 
8 a. Dorsal view of this species. 
8 b. Ventral view, showing the marks of the internal spires. 
8 c, d. Profile and front view of the same. 
