The spider is generally dark brown to blackish and covered in delicate or colourless hairs.

The female has the longest accessory glands in the genus and the male has a short curl for an embolus and a very thin appendage on its palpal tibia, or tibial apophysis.

[4] In Wayne Maddison's 2015 study of spider phylogenetic classification, the genus Euophrys was listed to the tribe Euophryini.

[6] Jerzy Prószyński allocated the genus as member of a subgroup of genera called Euophrydeae after the latter name.

[12] Euophrys purcelli is a small spider with a body divided into two main parts: a larger cephalothorax and a smaller abdomen.

The carapace, the hard upper part of the cephalothorax, is moderately high and mainly dark brown, apart from the very back which is yellow.

The top is blackish, covered in colourless hairs like the carapace, but with a pattern of white spots and chevrons.

The abdomen has a pattern of small grey or greyish-black spots on the top and three dark bands on the bottom.

Spiral flanges that show a level of sclerotization surround the copulatory openings.

[14] The openings lead to short insemination ducts and small spermathecae, or receptacles.

The embolus that extends from the top of the bulb is short and makes a distinctive curl.

Other members of the species have been found in De Hoop Nature Reserve in Western Cape.

[22] Euophrys purcelli has been found in forests of Eucalyptus and Protea trees, including the fynbos that are typical of South Africa.