K0NGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 25. NIO 2. 173 



There is another specimen, consisting of two radials and their arms, that is still smoother. 

 These differences are no doubt chiefly due to youth; another specimen shows them to a 

 less extent. After careful consideration, therefore, I see no ground for separating these 

 specimens as another species x ). Perhaps I may be permitted to express the hope that no 

 zealous writer will think it necessary to found a new species on the evidence of my figure. 

 This practice of giving names to species of which the writer has never seen a single 

 specimen savours of impertinence. Of such names the lists of synonyms are very largely 

 composed. 



Locality: the upper part of the waterfail outside the south wall of Wisby, in the 

 Pierygotus bed e. Not known out of Gotland. 



This species was not figured by Angelin. 



Gissocrinus sp. 

 (Plate X, figs. 379 — 402.) 



There has recently been found a small specimen, apparently referable to this genus, 

 and consisting of a slightly distorted cup with one or two brachials and one columnal. 

 The specimen cannot be referred to anv described species of Gissocrinus ; but, since its 

 incomplcteness renders it unsuitable for the type-specimen of a new species, it will not 

 receive either diagnosis or naine in the present paper: I rely on the good taste and com- 

 mon sense of my colleagues to leave it unchristened for the present. 



Description of the specimen. 



Dorsal Cup conical below, hut with almost vertical sides above middle of BB. 

 Height varies in different radii, owing partly to different size of plates, partly to distor- 

 tion in fossilisation. Height to facet of 1. ant. R, 6 mm.; to facet of r. post. R, 5.2 mm.; 

 to top of r. post. R, 5.9 mm. Width at base, excluding ornament, 1.5 mm.; including 

 ornament, about 2.5 mm. Width above, estimated at 5.5 mm. 



The Ornament consists of very cl earl v defined axial ridges, with a few slighter 

 intervening folds. The height of the ridges is about 0.5 mm. 



IBB, 5, varying slightly in size. They bend up sharply from the stem, and the 

 measnrements, reckoning from the bend, are as follows: greatest height, 2 mm.; width 

 below l.i mm.; width above 1.75 inni. 1. post. B is not so strongly ribbed as the others. 

 The non-fusion of the IBB need not prevent this specimen from being a Gissocrinus; for, 

 as we have already seen (pp. 152, 156, 161, 172), the fusion is by no means al ways either complete 

 or along the same interradii. It is probable that the IBB were rarely fused in the young 

 of any Gissocrinus. The shape and ornament of the cup are far safer guides to the generic 

 position of the specimen than the number of its IBB. 



*) Since the above was writteu Mr. Wennersten has found 3 more young specimens at the same locality 

 which confirm the above conclusions. 



