PLATE 61. 
Fig. 1. 306. 3. AsaPHus? NODOSTRIATUS. (Pag. 248.) 
c=] 
1 a. The fragment, natural size. . 
1b. A magnified portion of the surface, showing the lamellose strie, with small nodes which interrupt the 
lines, 
Fig. 2. 303. 4. CrRaurus? PUSTULOSUS. (Pag. 246.) 
2a. The fragment, natural size. 26. A magnified portion of the same 
. 
Fig. 3, 4. 43. 1. IsoreLus cieas. (Pag. 231.) 
3 a. The buckler of an individual of medium size. This is more extended in front, and the eyes are more 
prominent than usual. 
3 6. The caudal shield, corresponding in size to the buckler. The crust is removed, showing the lines of the 
articulations. 
3c. A portion of the surface of the buckler enlarged, showing a peculiar punctate structure which is scarcely 
visible to the naked eye. 
3d, e. Lateral and dorsal views of a small perfect specimen from Kentucky. The buckler is somewhat com- 
pressed or bent in front, so that the facial suture is not shown to its full extent. 
3 f. Buckler of an individual of ordinary size. The eyes are prominent, but less proportionally elevated, and 
the whole less convex than the specimen 3 a. The course of the facial suture is distinctly visible. 
3 g- Caudal shield corresponding in size to the buckler 3 f : the marks of the transverse segments scarcely 
visible. 
3h. View of the eye of 3 f (natural size), as seen looking forwards and outwards. 
3 i. Oblique front view of the eye, which, under ordinary magnifying glasses, presents no granulations. 
3k, The labrum or epistoma, showing the inner or upper side. 
3m. A portion of the same enlarged, showing the strie upon the surface. 
4 a,b, c. Front, lateral, and dorsal views of the original specimen to which GREEN applies the name of J. 
cyclops. 
