Palaeontographical Society Monographs Volume 34, Nos. 157-161 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1880 edition. Excerpt: ...and to whom Scottish palaeontology is much indebted for his many valuable researches. Genus CAMAROPHORIA, Kiny. 27. CAMAROPHORIA KINGII, Dav. Sup., Pl. XXXIII, figs. 12, 13. Shell subtrigonal, widest anteriorly, rounded in front, broader than long. Dorsal valve rather more convex than the ventral one, sometimes somewhat gibbous; valve divided into three almost equal parts, of which the central one forms a moderately raised mesial fold; surface covered with eleven or twelve wide, very moderately prominent ribs, gently longitudinally grooved along the middle, and of which some four form the mesial fold. Ventral valve not as deep as the opposite one, and divided by a wide mesial sinus 1 On the 3rd of December, 1878, Mr. John Young read to the Natural History Society of Glasgow a short notice of his discovery of this remarkable species, which he had collected some twelve years previously. He informs me likewise by letter that Mr. Robert Craig, of Langside, Beith, Ayrshire, has found the same species in the Hill Head Limestone. This is another locality for Rh/nclwpora, and on a much lower geological horizon, Bower-Trapping being in the Upper, and Hill Head in the Lower Limestone Series of Ayrshire. of moderate depth, three longitudinal ribs occupying its surface. The ribs on the lateral' portion of the valve are sharply bent upwards prior to becoming abruptly bent downwards or deflected to meet the margin of the opposite valve. Beak angular, moderately produced. In the interior of the ventral valve the conjoined dental plates form a wide trough-shaped process fixed to a low medio-longitudinal plate. In the dorsal valve the space between the socket is occupied by a small cardinal muscular process, on either side of which are two long, ...