150 F. A. BATHEK, CRINOIDEA OF GOTLAM). 



It is possible to givc two distinct explanations of these appearances, and the one 

 does not appear either more or less probable than the other. Messrs. Wachsmutii aud 

 Springer consider that in specimen c »the greater part of the ventral surface is occupied 

 by 5 large well defined orals which are arranged in the same raanner as those of the 

 Camerata ; while specimen h »probably at one time had orals like» specimen c, »but these 

 were partly resorbed and replaced by other plates». It is, however, equally possible that 

 the 5 central plates are merely large covering-plates, and that the 8 plates in specimen b 

 are not divided orals but merely the adcentral covering-plates. The fact that the adcentral 

 covering-plates can occupy a position precisely comparable to that of plates that are usu- 

 ally recognised as orals is admitted by Messrs. Wachsmutii and Springer, and may very 

 well be the case here. Which of these two explanations be chosen bv any future worker 

 will probably depend on the order in which he examines the specimens and on the thesis 

 that he is at the moment desirous of upholding. 



The Stein is stout and composed of very low ossicles, with a quinquelobate axial 

 canal and a radially striated articular surface (lig. 253). It cannot be distinguished from 

 the stem of C. longimanus. 



Notes on Angelin's figures: 



Tab. XX, fig. 1. This is not a good representation; neither the sides of the cup 

 nor the arms are straight enough. 



Tab. XXIII, fjgs. 10, 10 a. The arms beyond IIBr are restored; the rest is incorrect. 



Tab. XXIII, lig. 10 b. The arms are temporarily removed; for the correct details 

 see Text-fig. 20, b. 



Tab. XXIII, fig. 11. For correct details see Wachsmuth and Springers Pl. IX, hg. 1 

 (<>/). dt.) and our Text-fig. 20, c. 



Tab. VI, fig. 5. The drawing is enormously restored and is besides very bad. 



Tab. XXVI, figs. 4, 4 a — c. These give a very good idea of the arm-structure. 



Tab. XXVI, figs. 5, ha — b. These are also good. 



Tab. XXVI, fig. 2. For the correct details see Wachsmutii and Springers Pl. IX. 

 fig. 2 {oj), rit.) and our Text-fig. 20 h. 



Tab. XXVI fig. 2 a. This does not show the abnormality of the cup, which lies 

 in the fact that the 1. post. IB meets 1. post. R, so that its distal angle is truncate, and 

 so that the BB on either sidc do not meet one anothcr but lose a side. 



Locality: Follingbo (f) and Wisby (f). Not known out of Gotland. 



