PLATE III 



Fig. I, lA, iB and lob. Diclielaspis orthogonia Darwin. 



Fig. I. a. Scutum; b. Tergum; c. Carina; magnified 19 diameters. 



Fig. \A. Very young specimen; magnified 36 diameters. 



Fig. \B. Young specimen; magnified 2,6 diameters. 



Fig. \ob. Carina from the interior; magnified 15 diameters. 



Fig. 2 — 7. Diclielaspis Weberi n. sp. 



Fig. 2. Animal, lateral view; magnified 6'/, diameters. 



Fig. 3. a. Scutum; b. Tergum; c. Carina; magnified 10 diameters. 



Fig. 4. Carina, external view of the disc; magnified 10 diameters. 



Fig. 5. Mandible; magnified 134 diameters. 



Fig. 6. Maxilla; magnified 134 diameters. 



Fig. 7. Outer maxilla; magnified 52 diameters. 



Fig. 8 — 13. Diclielaspis Versluysi n. sp. 



Fig. 8. Animal, lateral view; magnified 11 diameters. 



Fig. 9. a. Scutum; b. Tergum; c. Carina; magnified 15 diameters. 



Fig. loa. Carina from the interior; magnified 15 diameters. 



Fig. II. a. Mandible, magnified 6t, diameters; b. inferior angle of the 

 mandible of the right side; c. the same of the mandible of 

 the left side. \\b and c magnified 160 diameters. 



Fig. 12. Maxilla; magnified 180 diameters. 



Fig. 13. Caudal appendage; magnified 63 diameters. 



Fig. 14. Diclielaspis Versluysi, varietas. 



Fig. 14. Animal, lateral view; magnified ii diameters. 



