PLATE 8. 

 Photographs of Cryptolithus tessellatus Green, made by C. E. Beecher. 



. L Specimen 231. A nearly complete individual, cleaned from the ventral side 

 and showing obscurely the hypostoma and fragments of numerous appendages. Note the 

 lines of appendifers along the sides of the axial lobe, x 1 1. 



Fig. 2. Specimen 232. Although this is not very well preserved, it shows more of 

 the cephalic appendages than any other. Even so, only just enough is shown to indicate 

 that they were similar to those on the thorax, x la. 



Fig. 3. Specimen 235. Dorsal side of the appendages of the thorax and pygidium. 

 See pi. 7, fig. 2 for the ventral view. On pi. 9, fig. 2 (left side) is a drawing taken from 

 the same specimen, x 1 1 . 



Fig. 4. Specimen 238. Part of a thorax and pygidium, seen from the ventral side. 

 The series of heavy segments shown in the upper part do not belong to one appendage, but 

 are the distal ends of several endopodites. See also text fig. 46 for a drawing of this speci- 

 men, x 18. 



Fig. 5. Specimen 237. Pygidium and part of the thorax, with some of the appen- 

 dages. XII. 



