29 



Control area . The surface of the fruit is a stratum for the . 

 life processes of many mite and fungal species. A careful examina- 

 tion of Figure 4 displays the exuvia of a citrus rust mite, a citrus 

 rust mite spermatophore, a fruit stoma, and some of the mycelia found 

 on the surface. By viewing exuvia and spermatophore together a per- 

 spective of size became evident. Stomata were found scattered over 

 the surface of citrus fruit. 



Oldfield et al. (1970) characterized the spermatophores of erio- 

 phyoidea. As shown in Figure 5, this spermatophore, though not erect, 

 can still serve to exemplify the base, stalk, expanded apical heac', and 

 sperm sac. The functional posture of the spermatophore is upright or 

 erect. The base of the spermatophore is shown at 34000X magnification 

 to demonstrate its structure and attachment to the surface of the fruit 

 (Figure 6). 



Other areas of the surface of the orange peel (Figure 7) again 

 serve to show the intertwining of mycelia and the presence of spermato- 

 phores on the surface. An erect spermatophore and citrus rust mites' 

 eggs are shown as normally associated with the surface of citrus (Fig- 

 ures 8 and 9). • 



Ambulatory movement . For the context of this work ambulatory 

 movement refers to the translocation of snails from one area to another 

 under its own incentive and energy without feeding. 



The terrestrial snails secrete mucilage from several small pores 

 at the ventral portion of the cephalic end of the foot which help form 

 a suction to the surface (Dr. F. Thompson, personal communication). The 

 thin layer of dried mucilage less than 1 y thick is visible in Figure 

 10. The mucilage has entirely coated the traveled surface of the fruit. 



