The fourline snakeblenny (Eumesogrammus praecisus) is a species of marine ray-finned fish belonging to the family Stichaeidae, the pricklebacks and shannies.

The fourline snakeblenny was first formally described as Chirus praecisus by the Danish zoologist Henrik Nikolai Krøyer with its type locality given as Greenland.

[3] In 1904 the Soviet zoologist Peter Schmidt described a new species Ernogrammus storoshi from the Sea of Okhotsk in the western Pacific and, in 1935, he and A.P.

The specific name praecisus means "cut off", Krøyer did not explain this but it may be an allusion to the shorter upper and lower lateral lines, which do not extend as far as the caudal fin.

It has a slightly oblique, large mouth which extends back to a level below the centre of the eye.

The dorsal fin is greyish brown with vadgue dark spots and an eyespot between the 6th and 10th spines.