Ah, it is all right now, I thought you might be Ruga-Ruga.
"How I Found Livingstone" by Henry M. Stanley
I cannot now refer to native works where the practice of employing digital rugae as a sign manual is alluded to.
"Scientific American Supplement No. 360, November 25, 1882" by Various
Back marked with transverse rugae.
"Narrative Of The Voyage Of H.M.S. Rattlesnake, Commanded By The Late Captain Owen Stanley, R.N., F.R.S. Etc. During The Years 1846-1850. Including Discoveries And Surveys In New Guinea, The Louisiade Archipelago, Etc. To Which Is Added The Account Of Mr. E.B. Kennedy's Expedition For The Exploration Of The Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist To The Expedition. In Two Volumes. Volume 1." by John MacGillivray
Instead of following the Grand Canal, Achille took the short cut through the Ruga di San Giovanni and the Rio di San Polo.
"The Lure of the Mask" by Harold MacGrath
Ruga, Rugulae: a wrinkle; small wrinkles.
"Explanation of Terms Used in Entomology" by John. B. Smith
The surface is marked by strong wrinkles (rugae), which radiate irregularly from the center toward the margin.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc." by George Francis Atkinson
Are they Waruga-ruga (bandits)?
"My Kalulu, Prince, King and Slave" by Henry M. Stanley
Dundee Rambler, Ruga, Mirianthes, and Leopoldine d'Orleans are all equally suitable for hedges.
"Small Gardens" by Violet Purton Biddle
This section of the colon is lined with rugae precisely like those which are found in the caecum.
"The Cambridge Natural History, Vol X., Mammalia" by Frank Evers Beddard
The Fallopian tubes are lined with mucous membrane, forming numerous longitudinal rugae.
"A System of Midwifery" by Edward Rigby