Eevieics — B^ief Criticisms- — Yorkshire Geology, etc. 381 



An exceedingly fine group of 13 club spines of echini in chalk, 

 Kent, and a fine cast of a cuneous frosted with marcasites and 

 spars, Bath. 



An Oriental devil of the first magnitude, very fine. 



The body of a species of encrinus, composed of angulated plates, 

 noil descript. and very rai'e, from a chalk pit in Surrey.^ 



A most capital petrefied subject, being the thigh-bone of some very 

 large animal,^ supposed to be either an elephant or hippopotamus, 

 found in a stone quarry at Stonsfield, Oxfordshire. 



The skeleton of an alligator, in black slate, extremely rare, 

 Germany. 



A most elegant and capital petrefaction of an Echinus overius, 

 vpith about 50 of its spines adhering to it, placed in as nice 

 order as in a recent shell, imbedded in chalk, Kent. This 

 specimen may be truly said to be invaluable, and is undoubtedly 

 unique. 



Three small gregories. 



II. — On Lists of Fossils. — Yorkshire Geology. 



The Naturalist. — Actinocamax plenus. 



Mr. Marr, in his presidential address to the Geological Society in 

 February last, made the following excellent remarks : — " It is 

 surprising how many fossil lists of the organisms contained in the 

 strata of our own Island have been drawn up as the result of a few 

 hours', or at most of a few days', work by the collector." And 

 " The rough-and-ready methods which, in some cases, have been 

 pursued in compiling lists of fossils of the different sediments would 

 not be tolerated at the present day in any other branch of science ; 

 it is time, indeed, that the stratigraphical geologist should apply 

 himself to his own branch of work with the assiduity and attention 

 to detail which are now expected of the palaeontologist in the 

 Museum." These words should be written in letters of gold across 

 the study- wall of every field geologist. 



Yorkshire men, however, care for none of these strictures, for 

 their diligence in the search for fossils is well known. That it was 

 greatly stimulated by the visits of Dr. Eowe to the Yorkshire Chalk 

 was obvious, and one of the chief results is seen in the July number 

 of Tlie Naturalist, where Mr. C. Thompson describes the first 

 discovery of Actinocamax plenus in the ' Black Band ' and overlying 

 a few inches of marl in Yorkshire. Repeated and continuous search 

 has at last been rewarded, for altogether three specimens are 

 recorded, one of which was found by Dr. Walton. This characteristic 

 zonal fossil is fairly common south of the Humber, but up to the 

 present discovery not a single specimen has been found north of 

 that river. As Belemnites are ' spotty ' things, and from their shape 

 roll about and get into depressions of the sea-floor, it is quite likely 

 that it may be some time again before another lot is found. 



The July number of TJie Naturalist is of considerable geological 



1 Very interesting in vie-^ of the recent ' discovery ' of Marsupites in Surrey. 

 ^ Probably Megalosaurus. 



