358 J. G. WALLER ON PARASITIC VEGETABLE ORGANISMS. 



('? Saprolegniese. £. Gabbardensis,mM.) PI. XIV., Figs. 8,9, 10, 11. 

 (? The same. S. Varniensis, mihi.) PI. XV., Figs. 3, 4. 



Varnie^e. 



This proposed genus is at present represented by one species, as 

 yet only found in the Varne sand, hence the name. It makes 

 confluent excavations which anastomose freely, simulating the 

 th alius of some lichens. Spreading out in various directions with 

 lobular terminal projections, possibly sporangia, marked through- 

 out by stiff villous appendages, which group around the latter. It 

 sometimes excavates from the sides, sometimes in the middle of 

 the calcareous particles. Its fruit is globular. 

 (VarniesB. V. vi/losa, mihi.) PI. XV., Figs. 5, 6, 7, 8. 



DESCRIPTION OF PLATES. 



Plate XIII. 



Fig. 1. Excavated conceptacle of Lacuna globosa, diam. 1000th of in. 

 Fig. 2. The same with radiating mycelia, diam. as above. 

 Fig. 3. Ditto with oospores (?) Zoospores (?) escaping, diam. as above. 

 Fig. 4. The same. Fig. 5, zoospores (?) escaping and a theca (?) athwart 



the conceptacle, diam. as above. 

 Fig. 6. Ditto. Spores issuing in a mucous, theca (?) as before, diam. as 



above. 

 Fig. 7, 8, 9. The same with different forms of thecse (?) diam. as above. 

 Fig. 10. Conceptacle with forms similar to paraphyses, and at Fig. 11, diam. 



as above. 

 Fig. 12. Lacuna sporangifera, diam. of conceptacle 1000th of in., also Figs. 



13, 14, 15. 

 Fig. 16. The same with flask-like conceptacle ; an intermediate form. 

 Fig. 17. Lacuna ampullceformis. Various examples ; one more amplified, 



ostiolum with spores escaped ; diam. 1000th of in. 

 Fig. 18. An intermediate form between the last and that of L. globosa. 

 Fig. 19. L. ampullcrformis with fruit; Oospores (?) 

 Fig. 20. Lacuna conjluens together with Figs. 21, 22, 23, &c, exhibiting 



different stages or variations. The granular objects show the 



manner of commencing excavation. Same mean diameter as 



above to all the circular orifices. 



Plate XIV. 

 Fig. 1. Achlya p e7'f or ans, the tubes void of protoplasm; mean diam. of 



tubes, 777th of in. 

 Fig. 2. Achlya villosa, tubes filled with plasmic matter. At fig. 3 portion 



of tube more highly magnified to show villi. Mean diam* 



of tube 666th of in. 



