PLATE 104. 



AULACANTHIDA. 



Diam. Page 



Fig. 1. Aulospathis bifurca, n. sp., . . . . x 50 1586 



A complete specimen, excellently preserved, with an ovate alveolate 

 calymma and two central capsules. The surface of the calymma is 

 covered with tangential needles. 



Fig. 2. Aulospathis bifurca, n. sp., . . . x 100 1586 



An isolated central capsule of another specimen, surrounded by granules 

 of the phaeodium. o, Eadiate operculum of the astropyle ; u, the 

 two lateral parapylse ; e, external membrane of the capsule ; i, in- 

 ternal membrane ; c, vacuoles in the protoplasm; n, nucleus; 

 Z, numerous nucleoli. 



Fig. 3. Aulospathis bifurca, n. sp., . . . . x 80 1586 



Two central capsules of another specimen, surrounded by the phseodium 

 (Self-division). Characters as in fig. 2. 



Fig. 4. Aulospathis bifurca, n. sp.,. . . . . x 100 1586 



A single radial tube. 



Fig. 5. Aulospathis bifurca, n. sp., . . . . x 200 1586 



Distal part of another radial tube, partly filled up by air-bubbles. 



Fig. 6. Aulospathis trifurca, n. sp., . . . . x 200 1586 



Distal part of a single radial tube. 



Fig. 7. Aulospathis trifurca, n. sp., . . . x 200 



Distal part of another radial tube. 



1586 



Fig. 8. Aulospathis triodon, n. sp., . . . , x 100 1587 



A single radial tube. 



Fig. 9. Aulospathis tetrodon, n. sp. ; . . . ' . x 200 1588 



Distal end of a single tube. 



Figs. 10-13. Aulospathis poly morpha, n. sp., % . x 400 1587 



Four single terminal branches with very different forms of spathillse. 



Figs. 14-17. Aulospathis variabilis, n. sp., . , x 400 1588 



Four single terminal branches with very different forms of spathilla3. 



