138 F. A. BATIIER, CRINOIDEA OF GOTLAND. 



vertieal ;ixis. The surface is ornamented with delicate granules arrängéd in Fadiating 

 wavy Ii nes. 



IBB 5; pentagonal and very low; height 1.25 ram.; greatest width 3.25 rara. 



BB 5; 4 are hexagonal, and their adjacent sides are very short. Thev are 3.75 rara. 

 high and 5 rara. in greatest width. Post. B has short sides adjoinihg the othér BB, but 

 the sides abutting on the RR are long: height 4.25 rara.; greatest width ">.25 ram.; width 

 where it supports x, 2.25 ram. 



RR 5; pentagonal, but deeply cut into by facet so as to appear almost lunulate: 

 height 6 mm.; height to bottom of facet 2.8 rara.; width 8 mm.; width of facet 4.5 rara. 



Ärras are fairly stout and dichotomise regularly; their complete length is unknown. 



IBi-j very small and crescentic in outline. From its very characteristic shape and 

 from the shape of the radial, Diana, whose symbol is the crescent rnoon, seeraed an ap- 

 propriate patron deity for this species. 



IBr 2 is axillary, and is slightly constricted in the raiddle. Its extreme height and 

 width are both 4 ram. It rests on the radial as well as on the first priraibrach. 



IIBr number 4 in the ann observed. 



Anal structures: x so far as seen appears square, with a width of 2.25 mm. It 

 bends in above. No other plates of the tube are to be seen. 



The Stem has a diameter of 6 mm. It consists of low ossicles, of which the alt«r- 

 nate ones project in slight ridges. The axial canal is rather large and appears to be 

 quinquelobate, but this is doubtful. 



Relations of species: it apparently belongs to Group I. but differs from the other 

 species of that group in its low regular cup and in the shape of its costals. 



This species was not figured by Angelin. 



Locality: Slite, Quarnberget (f). Not known ont of Gotland. 



Cyathocrinus glaber. 



(Plate VII, figs. 224—226.) 

 1878 Angelin, Iconographia, p. 23, Tab. XXIII, figs. 12, 13. 

 Diagnosis. 



Dorsal cup with sides concavely curved, bending outwards suddenly in the middle 

 of the RR; as seen from above, its outline is roughly pentagonal, with the interradial 

 areas slightly concave. Facet 2 / 3 width of radial and almost vertical. IBrj wedge-shaped, 

 so that the arms bend rapidly upwards. Arms dichotomise at frequent intervals; ossicles 

 rather vvide, with rounded backs. 



Angelin's diagnosis of this species was as follows. — Radialia [/. c. radial and primi- 

 brachs] 4, low and wide. Anals 2 (tig. 13 is a variety with a single anal). Arm-ossicles 

 low, nunierous. 



