KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 21. N:0 9. 33 



Explanation of the Plate. 



Fig. 1. Front portion of tte Scorpion, enlarged four times. 



» 2. Hind portion of the same, ineluding the fifth, sixth and seventh abdominal segments and the tail, en- 

 larged the same as the preceding. 



» 3. The Scorpion; natural size. 



» 4. Anterior portion of the cephalothorax and the mandibles. Enlarged eight times. 



» 5. Fingers of the mandibles. Enlarged sixteen times. 



» 6. Granulations from the scapnla of the palpi. Enlarged sixteen times. 



» 7. Last tarsal joints of the second walking iimb of the left side. Enlarged twenty-two times. 



» 8. Portion of the membrane between the tirst and second dorsal plates, enlarged fourteen times. 



« 9. Snrface of one of the dorsal plates seen under the microscope. The black döts are probably openings 

 of the pore canals. 



» 10. Snrface of one of the dorsal plates of luriis Dufourems (Brtjllé). Similary magnified. 



» 11. Integument of the same seen from above. 



» 12. Vertical section of the same, passing through one of the pore canals. 



» 13. Eight side of a ventral plate of the same species, seen from the mside to show the spiraculum, slightly 

 enlarged. 



K. Vet. Akacl. Handl. Band 21. N:o 9. 



