PLATE 120. 



MEDUSETTIDA. 



Diam. Page 



Fig. 1. Medusetta codonium, n. sp., . x 400 1668 



Fig. 2. Medusetta quadrigata, n. sp., . . . x 400 1668 



The central capsule is visible in the upper half, the phaeodium in the 

 lower half of the shell-cavity. 



Fig. 3. Medusetta tetranema, n. sp., . . . . x 400 1669 



Fig. 4. Medusetta craspedota, n. sp., . . . x 400 1669 



Fig. 5. Gazelletta hexanema, n. sp., . . . . x 300 1671 



Fig. 6. Gazelletta bifurca, n. sp., . . . . . x 300 1672 



A single alveolate foot. 



Fig. 7. Gazelletta macronema, n. sp., . . . x 200 1671 



Oral view of the shelL 



Fig. 8. Gazelletta macronema, n. sp., . . . x 800 1671 



Three joints of an alveolate foot. 



Fig. 9. Gazelletta cyrtonema, n. sp., . . . x 300 1671 



The upper part of the shell encloses the central capsule with its nucleus. 

 The voluminous phaeodium is prominent over the mouth. 



Fig. 10. Gazelletta orthonema, n. sp., . . . . x 200 1671 



The central capsule and its nucleus are visible in the shell-cavity. 



Fig. 11. Gazelletta schleinitzii, n. sp., . . . . x 400 1673 



Oblique apical view, with the enclosed central capsule, the nucleus of which 

 contains numerous nucleoli. 



Fig. 12. Gazelletta schleinitzii, n. sp., . . . x 300 1673 



A single alveolate foot. 



Fig. 13. Gazelletta trispathilla, n. sp., . . x 400 1673 



The middle part of a foot. 



Fig. 14. Gazelletta robusta, n. sp., ... x 300 1673 



The base of a foot, exhibiting the pores of the alveoli. 



Fig. 15. Gazelletta studeri, n. sp., . . . . x 400 1673 



The distal end of a foot ; four alveoli filled up by air-bubbles. 



Fig. 16. Gazelletta dendronema, n. sp., . x 300 1674 



A part of the velum, seen from the inside. The alveoles are partly filled 

 by air. 



