 The spaces between the lamellæ are lined by endothelium, and open freely into the perichoroidal lymph space, which, in its turn, communicates with the periscleral space by the perforations in the sclera through which the vessels and nerves are transmitted.Caledonian Railway 264 Class

The Caledonian Railway 264 and 611 classes were 0-4-0 saddle tank locomotives designed by Dugald Drummond and built by Neilson and Company in 1885.Later examples were built at St. Rollox railway works under the direction of John F. McIntosh in 1895, 1900, 1902 and 1908.