PLATE 50. 

 LARCARIDA, LAENACIDA et ZONARTDA. 



Diam. Pago 



Fig. 1. Larnacilla typus, n. sp., . . . . x 300 617 



From the sagittal pole (dorsal view). 



Fig. la. From the lateral pole (sagittal section). 



Fig. \b. From the principal pole (equatorial section). 



Fig. 2. Larnacalpis lentellipsis, n. sp., . . . x 400 620 



From the sagittal pole (dorsal view). 

 Fig. la. From the lateral pole (sagittal section). 

 Fig. 2ft. From the principal pole (equatorial section). 



Fig. 3. Lamacalpis triaxonia, n. sp., . . . x 400 621 



From the sagittal pole (dorsal view). 



Fig. 4. Larnacantha hexacantlva, n. sp., . . . . x 400 622 



From the sagittal pole (dorsal view). 



Fig. 5. Larnacantha bicruciata, n. sp., . . . x 300 623 



Frontal view. 



Fig. 6. Larnacantha 2irismatica, n. sp., . . . . x 300 623 



Half frontal, half lateral view. 



Fig. 7. Cenolarcus primordialis, n. sp., x 300 607 



From the sagittal polo. 

 Fig. la. From the lateral pole. 

 Fig. 7b. From the principal pole. 



Fig. 8. Larcidium dodecanthum, n. sp., . . . x 300 612 



From the sagittal pole. 



Fig. 8<z. From the principal pole. 



Fig. 9. Zonarium octangulum, n. sp., . . . x 300 685 



Frontal view. 



Fig. 10. Zoniscus tetracanthus, n. sp., . . . x 300 687 



Frontal view. 



Fig. 11. Zoniscus hexatholius, n. sp., . . x 400 687 



Dorsal view (from the sagittal pole). 



Fig. lla. Lateral view (from the frontal pole). 



Fig. 12. Zonidium octotholium, n. sp., . . . x 300 688 



Frontal section (from the sagittal pole). 



Fig. 12<z. Lateral view (from the frontal pole). 



