KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 25. N:0 2. 113 



other Crinoids, and by the fact that Mr. Billings found three and a half inches of stem 

 with bis species and no root. 



The present species differs from E. obconicvs by the characters given in the diag- 

 nosis. It is however possible, as just remarked, that the stena is not really different. 

 Mr. Billings regarded the straightness of the arms in E. obconicus, as compared with 

 E. spiralis, as its ehief diagnostic charaeter. Angelin and Wachsmutii had even con- 

 sidered this as a most marked generic charaeter. It appears, however, that the coiling of 

 the arms varies so mueh in different individuals that it can hardly be regarded as even 

 a specific charaeter. 



Notes on Angelix's figures: 



Tab. IV, figs. 7 and 7 a. The stem does not show the peculiar irregularitios indi- 

 cative of radial sutures; the arms are mueh restored, and the arabulacral plates of the 

 tegmen are not shown. These figures are enlarged ll/8ths. Fig. 7 was copied l>v Zittel, 

 Handb. d. Pal. fig. 239; hut his copy is reversed, which is most puzzling to the student. 

 Neumayrs figure, Die Stämme des Thierreiches, fig. 121, is correct. 



Tab. IV, figs. 7 /; and 7 e are apparently the same specimen, not different ones as 

 stat ed in the expla nation of the plates. 



Tab. IV, tigs. 7 c and 7 d are also of one specimen. No stem ossiele is preserved 

 as represented. As the ventral surfaces of these two specimens are here refigured, criticism 

 of Axgelin's figures is unnecessary. 



Localities: 



Specimens (a) and (b) come from Follingbo, bed f. 

 » (c) and (d) » » the Klinteberg, » 



(e) » Galgberget, Wisby, bed f. 



(f) Waterfall a t Wisby, bed e?. 



(g) » North of Wisby, base of bed f. 

 (h) Weskinde, N. of Wisby, bed f. 

 (i) » » near Wisby, bed f. 



N. B. The bed f at Wisby is on a lower horison than that al Follingbo. 



Decadocrinid^e. 



Inadunata Dicyclica, in which the arms bifurcate, each main branch bearing armlets 

 or pinnules; with from none to three anal plates in the dorsal cup, supporting a tube in 

 which the lumen is usually flattened transversely and the plates plicated; with a tegmen 

 coinposed of numerous small plates, verv rarely distinguishable. 



K.' Sv. Vet. Akad. Handl. Biind. 25. N:o 1. 15 



