72 Notices of Memoirs — Underground Waters of Craven. 



in the lobe of the fin itself there is a series of four well-defined, 

 hourglass-shaped supports. Of these bones the anterior three are 

 much elongated, and nearly equally slender, while the fourth is 

 much more robust and expanded at its distal end. The four elements 

 radiate from the anterior half of the base of the fin ; and it seems 

 very probable that some smaller cartilage behind and near the distal 

 border of the lobe have disappeared from lack of ossification. The 

 fin-rays gradually increase in length from the anterior border to the 

 middle of the lobe, whence they decrease again backwards, and 

 finally become extremely delicate." 



In my collection there is a specimen of Coelacanthus tingleyensis, 

 Davis, from the Cannel Coal, Middle Coal-measures, Tingley, York- 

 shire, crushed vertically, which exhibits the pectoral fins, and one, 

 the left, shows characters very similar to those given by Dr. Smith 

 Woodward. The clavicle is well shown and springing fi'om a point 

 about its centre ; and opposite to the process which is usually seen 

 on these bones there are six basal supports, of which the anterior 

 four are elongated and more or less uniform in thickness, the 

 fifth is more nearly hourglass-shaped, and the sixth (fourth of 

 Dr. Woodward ?) is more robust and widely expanded distally. No 

 supports are seen posteriorly to the sixth, but as the dermal rays 

 extend some distance behind this point, and as the lobe of the fin 

 has here sufi'ered somewhat from crushing, it seems highly probable 

 that there were two, if not three, supports posterior to the sixth, but 

 that they have in the specimen been destroyed during fossilization. 

 At tiicir distal extremities each support is opposed to two or more 

 of the dermal rays, which, as pointed out by Dr. Woodward, 

 "increase in length from the anterior border to the middle of the 

 lobe, whence they decrease backwards, and finally become extremely 

 fine." All the rays are closely articulated distally. 



From the above it will at once be seen, as pointed out by 

 Dr. Woodwai'd, that the pectoral fin of Ccelacantlms is a striking 

 contrast to that of the existing Crossopterygian Polypterus, the 

 basalia more closely approaching that of the Actinopterygii. 



JsroTXCDZES oip DvniBnvnoTK-s, 



I- — The Movements of Underground Waters of Craven.^ — 

 I'irst Eeport of the Committee, consisting of Professor W. W. 

 Watts (Chairman), Mr. A. R. Dwerrtuouse (Secretary), Pro- 

 fessor A. Smithells, Rev. E. Jones, Mr. Walter Morrison, 

 M.P., Mr. G. Bray, Rev. W. Lower Carter, Mr. W. Fairley, 

 Mr. P. F. Kendall, and Mr. J. E. Marr. (Drawn up by the 

 Secretary.) 



THE Committee is carrying out the investigation in conjunction 

 with a Committee of the Yorkshire Geological and Polytechnic 

 Society. The present is merely an interim report, as the work is 

 still in progress. 



' Bead before the British Association, Section C (Geology), Bradford, Sept., 1900. 



