Dr. W. T. Caiman — On Arthropleiira Moyseyi, n.sp. 541 



size of one's fist, and containing well-formed angular crystals. This 

 fact has been taken, in some quarters, to support the hydatogenetic 

 theory of the deposition of tin-ore. What happens, however, is that 

 the limestone at Lahat Mine, as it has been proved in several other 

 Tiiines in Kinta, contains tin-ore in situ, and when the limestone has 

 been dissolved by the water the freed ore is brought up by the under- 

 ground stream. Several pieces of limestone containing crystals of 

 tin-ore were found by the writer at this spot. The water was tested 

 for tin, and no trace of the metal could he found in it. Mr. Salter's 

 analysis of the water is given below : — 



0-0030 



Total solids 0-146 



Fea Osl 



■Al^Os/ 



CaO 0-05581 



(equivalent to Ca CO?,) . . . 0-09965 



KCl 0-0.S50 



(equivalent to K C 0:0 • • • • 0-0315 



III. — On Authropleura Moyseyi, n.sp., fkom the Coal-measukes 

 or Debyshire. 



By W. T. Calman, D.Sc, British Museum (Natural History). 



(PLATE XXXVm.) 



I^HE specimen dealt with in this paper was obtained some years 

 ago by Dr. L. Moysey, of Nottingham, and was sent by him to 

 Dr. Henry Woodward, who has been so kind as to entrust it to me for 

 examination. 



Although the specimen has not hitherto been desci'ibed, it has been 

 several times mentioned in paljeontological literature. It was first 

 referred to by Dr. Moysey as "a complete but diminutive example 

 akin to the Arthropleura armata of Jordan from Saarbrucken " ' and 

 was later recorded by him as ^"Arthropleura, n.sp."- Herr Andree, 

 in the second of his two memoirs on Arthropleura,^ makes some 

 observations on it, based on examination of a photograph sent to him 

 by Dr. Moysey. Herr Andree agrees with Dr. Moysey in referring 

 the specimen to the genus Arthropleura, but concludes that it adds 

 nothing to our knowledge of the genus, the photograph evidently not 

 having revealed to him certain features that are clearly visible in the 

 fossil itself. These features are well shown in the accompanying 

 Plate, for which I am indebted to the care and skill of Miss G. M. 

 Woodward. 



Artheoplkuka Motseyi, n.sp. (Plate XXXVIII.) 



Description. — The specimen is contained in an ironstone nodule 

 which has been split longitudinally. The structure is most clearly 

 seen on the half in which the fossil is exposed in relief, but some 

 important details have been obtained from a ' squeeze ' kindly 

 prepared for me from the counterpart by Dr. F. A. Bather. 



1 Geol. Mag. (5), v, p. 221, 1908. " Geol. Mag. (5), viii, p. 506, 1911. 

 ' Palaontographica, Ix, p. 303, 1913. 



