256 Prof. P. M. Duncan 07i Thallophyh 



Fig. 17. A ramose tube. These drawings (figs. 11-19) are from one coral, and arc 



magnified 300 diameters. 

 Fig. 20. BaJano^hyUia verrucaria, A parasitic tube showing minute furry-looking 



collections of lateral branches. X 350 diameters. 

 Fig. 21, Same subject. The tube entering and branching. 

 Fig. 22. Glomerulus and ragged tube. X 350 diameters. 



Fig. 23. A parasitic tube entering, having glomeruli and ending. X 350 diameters. 

 Fig. 24. Globular terminations. X 350 diameters. 

 Fig. 25. A tube with glomeruli. X 350 diameters. 



Figs. 26, 27, 28. Long and very minute tubules coming from a typical tube and some 



conglomeruli. X 350 diameters. 

 Fig. 29. Entry of tubes. X 40 diameters. 



Fig. 30. A tube ending in an enlargement with commencing oifshoots. X 350 

 diameters. 



Fig. 31. A globular termination. X 350 diameters. 



Fig. 32. A termination with a tube springing from it. X 350 diameters. All the 

 views from figs. 20 to 32 inclusive are from the same coral. 



Plate 7. 



Fig. 33. Loj)hohelia proUfera. Large tubes nearly filled with cell-wall and cytioplasm 

 witliin the interlaminar space of a septum ; minute tubules come ofi", and 

 occasionally end in spaces or lacunse. X 350 diameters. 



Fig. 34. Minute tubules and lacunas. X 350 diameters. 



Fig. 35. Large interlaminar tubes. X 300 diameters. 



Fig. 36. This and all the following figures are taken from decalcified specimens put 

 np in glycerine. Some swelling of the parasitic supports occurs. A fine 

 ending of a tube, showing wall of parasite {Saprolegnia ferax), unicellular and 

 ovoid bodies with one or more granules in them. X 350 diameters. From 

 Caryoj)hylUa da vis, var. Smifhi. 



Fig. 37. A ramose filament of Saprolegnm fer ax, xevj ch.dimciQv'i'&t'ic. The cytioplasm 

 is colourless. X 400 diameters. 



Fig. 38. Filamentous tubes with globose endings. X 400 diameters. Figs. 37 & 38 

 are from the same coral as fig. 36, and refer to Saprolegnia ferax. 



Fig. 39. Filaments of Achlya penetrans from Balanophyllia verrucaria. A mass of 

 them. X 350 diameters. 



Fig. 40. A small filament of Sa'prolegnia ferax in Caryophyllia clavis, showing cell-wall 

 and cytioplasm collected more or less in regidar spots with vacant interspaces. 

 X 350 diameters. 



Fig. 41. A filament of Saprolegnia ferax with a dissepiment and ending in branches, 

 and a globular mass filled with granules. X 350 diameters. 



Fig. 42. A globular part of a filament with several refractive granules. X 400 

 diameters. 



Fig. 43. A dissepiment in a filament of Achlya penetrans from Balanophyllia verrucaria. 

 X 400 diameters. 



Fig. 44. Filaments of Achlya penetrans from the same coral. x400 diameters. 

 Figs. 45, 46, 47. Filaments of Achlya penetrans from the same coral. X 350 diameters. 

 Fig. 48. Oospore and filament of Achlya i^enetrans from surface of Balanophyllia 



verrucaria. X 300 diameters. 

 Fig. 49. Oospore. 



Fig. 50. Moniliform appearance of cytioplasm in a filament from the same coral. 

 X 300 diameters. 



Fig. 51. A filament with a globular end and branches of Achlya penetrans, x 400 . 

 diameters. 



