PLATE 40. 



Page 



Fig. 1 a - p. Merista ( = Meristklla) bella. 248 



1 o - A. Dorsal, ventral, profile, front, and cardinal views of joung slu-lls. 



1 i, k, I. Views of a larger specimen. The si)ecies rarely attains a larger size than these figures. 



1 m - p. Views of an unusually large specimen of this sijecies. 



Fig. 2 a, h. Renssel^ria l^vis. 2.^6 



2 a, b. Dorsal and profile views of a specimen of this species. 



Fig. '2 c -f, & S a - d. Merista ( = Mekistki.i.a) subqt'adkat.^. 249 



2 e, d, e,/. Dorsal, ventral, profile, and front views of a young individual. 



3 a. Dorsal view of this species. 



3 b. Ventral view, showing the marks of the internal sj)ircs. 

 S c, d. Profile and front view of the same. 



