PLANCHE I. 



Fig, 1. — Ophiotypa simplex Kodhler, face dorsale. Gr. = 10. 



Fig. 2. — Ophiotypa simplex, vue latérale. Gr. = 10. 



Fig. 3. — Ophiotypa simplex, face ventrale Gr. = 10. 



Fig. 4. — Ophiopyrgus Alcochi Kœhler, face dorsale. Gr. = 8. 



Fig. 5. — Ophiopyrgus Alcocki, vue latérale. Gr. = 8. 



Fig. 6. — Ophiopyrgus Alcochi, (ace ventrale. Gr. = 8. 



Fig. 7. — Ophiomastus tumid us 'Koëhler, face dorsale. Gr. = 9. 



Fig. 8. — Ojyhiomastus tumidus, vue latérale. Gr. = 9. 



Fig. 9. — Ophioniastus tumidus, face ventrale. Gr. = 9. 



