Looks like Tropical Tent Spider (Cytophora citricola) eggs that have "fallen over" out of a destroyed web. A very obscure
but interesting photo!
The eggs would have been strung up vertically in the centre of the web. I can see that the web has been broken, plus it's in a Ziziphus mucronata
(Buffalo thorn) a favourite for these spiders. The web has been destroyed by something and the eggs have been displaced or wrapped around a thin branch.
Some information of these spiders...
Web bound spiders that never leave their web.
8mm to 20mm in length. Abdomen is longer than it is wide. Colour varies from light grey to black. Often have white markings.
Found throughout the subregion except arid areas. Widespread throughout the world.
Web bound often found in communal clumps of webs. Make their webs in low vegetation, particularly aloes, cycads and other spiky plants and trees. The mesh in their webs are a distinctly diamond shaped just like a fishing net. A tent like sheet can be found in the center of their web. This tent like sheet is constructed using numerous supporting lines. The center of the sheet is pulled up to form a tent.
The spider rests underneath the sheet and waits for prey. Prey falls hits the knock down threads, falls onto the sheet (tent) and the spider pulls the prey through the web and delivers a bite.
This timid spider is harmless to humans.
Juveniles often occur in groups. Many individuals may be found sharing a suitable plant or clump of plants. These spiders live side by side with each other but not communal in the true sense of the word. This aggregating together is thought to increase the amount of prey caught. These aggregations of webs provide a suitable place for kleptoparasites.
Egg sacs are flat on one side and rounded on another (just like a small slightly elongated tennis ball that has been cut in half). These egg sacs are deposited above the center of the sheet in amoungst the supporting threads. Egg sacs may be disguised using prey remains.
When threatened these spiders vibrate the web to blur their outline. One of the few spiders youcan identify down to species level. This is because there is only one species in Southern Africa!