The discovery of the plates of various species of Chitonidae in the Carboniferous strata of England and Ireland, as well as on the Continent, within the last few years, is a point of considerable interest to Palaeontologists engaged in the investigation of the fossil remains of that period. The plates of Chiton and Chitonellus which form the subject of the present notice, are, so far as I am aware, the first that have been recorded from our Scottish Carboniferous rocks, in which, however, they seem to be very rare, three species only having as yet been found; but diligent research will, doubtless, bring others to light. Chiton humilis, is found in the Robroyston beds, north-east of Glasgow, in shale, overlying one of the Upper limestones, at about 300 fathoms below the “Ell” coal of the Lanarkshire series. Only one perfect plate, and fragments of one or two others have been obtained. They are associated with Crinoidea and various genera of fossils of the Carboniferous Limestone, which are often found in these beds in a fine state of preservation. The other species from the marine shales of Craigenglen, Campsie, belongs to the sub-genus Chitonellus. Only two plates have been found: the first was in the collection of my friend, the late Alexander Cowan, of Campsie, who obtained it from the same beds, but the specimen was unfortunately lost. They occur in shale, along with numerous other genera fossils of the Carboniferous Limestone. The position of the beds is under the Main This 250-word extract was created in the absence of an abstract