STUDY PLATE FOR SCIENTIFIC STUDENTS. 
Fic. 19.—1. (A.) The scales of the back. 0.0. Parietal shields. V. Interparietalshield. F. Anterior and 
posterior frontal shields. S. Supraocular shield. R. Rostral shield. 
2. N.N. Nasal shield. L. Loreal shield. A. Preocular shield. P. Postocular shield. U.U. Upper 
labial shields. T. Temporal shields. M. Mental or median lower labial. C. Chin shields. 
3. (A.). The abdominal plates or shields which are movable. These are used in locomotion. Their 
edges grip uneven surtaces. B. The chin shields. C. Lower labialshields. D. Upper lip. 
