Reports and Proceedings — Geological Society of London. 283 



writings of these authors. But in the account of P. H. Carpenter's 

 views is a curious omission. The division of the Crinoidea by 

 Wachsrnuth and Springer into PalsBocrinoidea and Stomatoorinoidea 

 was accepted by Carpenter and Etheridge, jun., in 1881 (Ann. Mag. 

 Nat. Hist., [5,] vii, 281-298) ; the latter authors, however, laid more 

 stress on the asymmetry of the posterior interradius in Pal^ocrinoidea 

 than on the condition of the tegmen, and therefore suggested the 

 names Irregularia and Regularia. 



It is personally gratifying to gather from this history that the first 

 rejection of the division into Palaeocrinoidea and Neoerinoidea must 

 have been independently and synchronously published by these 

 eminent American authorities and by myself (February, 1889) ; 

 further, that in applying the logical consequences of the tegminal 

 structure of Ihxocrinus to all Crinoidea, I actually preceded them by 

 half a year (April, 1890). No one will suffer from the absence of 

 all allusion to this in the present monograph, which certainly does 

 not err in the direction of underestimating any contributions that 

 I have so far been able to make to our knowledge of the Crinoidea. 



Such errors as have been pointed out do not materially detract 

 from the value of the monograph, and we can readily forgive a few 

 such slips when we remember the age and ill-health with which the 

 senior author had to struggle, and the constant pressure of other 

 occupation that must have made his colleague's revision of the 

 proofs a task of no ordinary difficulty. These circumstances will, 

 I hope, always be borne in mind by any who read the present or 

 future chapters of this review. F. A. Bather. 



[To be continued.) 



I2.EFOE,TS .A-lfrX) ZPIROGIEEIDIIsrGS. 



Geological Society of London. 



I.— April 20, 1898.— W. Whitaker, B.A., F.R.S., President, in 

 the Chair. The following communications were read : — 



1. "Note on an Ebbing and Flowing Well, at Newton Nottage 

 (Glamorganshire)." By H. G. Madan, Esq., M.A., F.C.S. (Com- 

 municated by A; Strahan, Esq., M.A., F.G.S.) 



This well lies in a direct line drawn north and south from the 

 church of Newton Nottage to the sea, about 80 yards south of the 

 church and 500 yards from the sea. Sand-hills about 20 or 30 feet 

 high lie between it and the sea. A range of Carboniferous Lime- 

 stone cliffs runs east and west to the north of the church, while the 

 same formation crops out in the sea at half-tide level. Between the 

 two there is a band of Keuper conglomerate covered in one place at 

 least by 7 feet of brown loamy clay with pebbles. At the shore- 

 junction of conglomerate and limestone numerous springs occur, and 

 it is in the conglomerate that the well is sunk, its bottom being 

 8 feet above ordnance datum. 



A series of about forty observations made at intervals of an hour 

 (and in many cases at the intermediate half-hours) during three 



