KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 25. N:(> 2. 167 



Gissocrinus goniodactylus, var. 



(Plate IX. figs. 326—334.) 



There is ;i variety of this species that in the extreme breadth and flat appearance 

 of its arm-ossicles approaches G. squamifer. This variety is not rare in England, but in 

 Gotland it is at present represented by nötning tnore fchan the upper portion of a crown, 

 Xo. 131 RM. The specimen apparently possessed a cup when first found, but the portion 

 of matrix on which it was has been löst. 



The Arm-ossicles are nearly half as wide again as high, with plain ridged backs. 

 The depth of the ossieles is small compared to their breadth, but is not so little as 

 in (i. squamifer. The sides of the ossieles are a little convex. The ossieles are dark- 

 coloured. 



The axial canal is separate from the ventral groove in the proximal, but not in 

 the distal region of the arms. The ventral groove is a wide V. 



The eovering-plates are about 6 to a brachial and are apparently eompound, but 

 their elements cannot be clearly distinguished. 



The Ventral Sac passes upwards with the arms; it is strongly folded transversely, 

 and the ridges being worn the appearance of slits is produced. The folded edges of the 

 plates are well seen (fig. 334). 



Locality in Gotland: Uncertain; Prof. Lindström suggests Follingbo and bed f. 



Gissocrinus squamifer, MS. 

 (Not figured.) 



[1873 Cyathocrinus (sp. 4) squamiferus, MSS. Salter. Catalogue of Fossils in Woodwardian Museum, 

 p. 124.] 



This species is fairly well known in England, and I believe that it is here repre- 

 sented by specimen No. 155 RM. In this specimen the Cup is not shown, but the Arms 

 are broad and massive. 



This species was not figured by Angelin. 



Locality i ti Gotland: Unknown. It apparently cornes from bed f. 



