BESCEIPTION OF ENOBAVINGS. 693 



PLATE XIV {continued.) 



Pigs. 18. Pinophysis acuta (Ehr.) — A front view. 

 IS). Diiiopliysis limbata (Ehr.) — A front view. 



20 and 27. Gallionclla coarctata (Ehr.) — Front views. 



21 and 22. Aniphitetras antediliiviana (Ralfs.) — Fig. 21, a single frustule; 



fig. 22, a chain of seven irustiilcs, seen in front. 

 24 and 25. Tetracyclus lacustris (Ralfs.) — Fig. 24, front view of a filament j 



fig. 2.5, a marginal view 

 26. Gallionclla sulcata (Ehr ) — A front view of a chain or filament. 



28. Actiiioptychus .Jupiter (Ebr.) 



29. Gallionclla crenulata (Ehr.) — Front view of a chain. 

 80. Sphenosira Catena (Ehr.) — Front view of a chain. 



31. Actinoptychus .' hexaptera (Ehr.) 



32. Amphipentas ? alternans (Ehr.) 



33. Asterolampra Marylandica (Ehr.) 

 84. Asteromphalus Ilumboldtii (Ehr.) 



35. Heliopelta Leeuwenhoekii (Ehr.) 



36. Sjnnbolophora Trinitatis (Ehr.) 



37. Spirillina vivipara (l"]hr.) — A member of the family Arcellina, having a 



close affinity with the calcareous-shelled Polythalamia or Foraminifera. 



38. Craspedodiscus elegans (Ehr.) 



39 and 40. Coscinodiscus radiatus (Ehr.) — Fig. 39, a front view ; fig> 40, a 



side view 

 41 and 42. Eupodiscus Germanicus (Ehr.) — Fig. 41, a front view; fig. 42, a 



side view. In fig. 41, the site of the three tubular processes, which led 



Ehrenberg at first to call it Tripodiscus, are seen. 

 43 and 44. Triceratium flavus (Ehr.) — Fig. 43, a front view,- fig. 44, a 



side view. 

 45 and 46. Climacosphenia moniligera (Ehr.) — Fig. 45, a front view ; fig. 46, 



a side view. 

 47. Terpsiniie musica (Ehr.) 

 48 and 49. Grammatophora gibba (Ehr.) — Fig. 48, a front view, showing the 



two imperfect septa (vittae, Kutz.)'at each end; fig. 49, a side view. 

 50 and 51. Zygoceros Surirella (Ehr.) — Fig. 50, a side view; fig. 51, a 



front view. 

 52 and 53. Grammatophora oceanica (Ehr.) — Fig. 52, a front view; fig. 53, a 



side view 

 54. Hemiaulus antarcticus (Ehr.) — A front view. 



PLATE XV. 



1. Amphiprora constricta (Ehr.) — A front view. 



2, 3, and 4. Surirella Gemma (Ehr.) — Fig. 2, lateral aspect; fig. .3, seen on 



one margin; fig. 4, ventral or dorsal aspect. These figures were in- 

 tended to especially represent the foot-like processes (cilia .?) and the 

 foramina through which these are protruded. 



5. Navicula fulva (Ehr.) — Ventral aspect. 



6. Navicula amphirhyncus (Ehr.) — Ventral surface. 



7. 8, and 9. Stauroneis phyllodes (Ehr.)— Figs. 7 and 8, ventral aspect ; fig. 9, 



a lateral view. 

 10, 14, and 30. Stauroptera scalaris (Ehr). — Fig. 10, ventral surface; fig. 14, 

 process of self-division seen on lateral aspect; fig. 30, side view of a 

 single frustule. 



