88 F. A. BATHER, CRINOIDEA OF GOTLAND. 



i*, post. and r. ant. inferradials. The mainaxil series forms a raore elevated arch than in 

 G. pugil. The restriction of the articular facet of eaeh mainaxil to its adanal side, 

 noticed in C. pugil, is here intensified; the upper portion of each mainaxil, together with 

 the first alphabrach, is so closely apposed to the corresponding adjacent plates as often 

 to present the appearance of a sutural union; it is, however, improbable that there was 

 any organic eonnection. 



The speeimen (b) that approaches C. pugil appears to have most of its mainaxils com- 

 pound plates; in other words a wide low plate occurs beneath each mainaxil and is united 

 to it by very close, possibly syzygial suture. This may have been intended to inerease 

 the flexibility of the arms, in which case the union was not syzygial. One such mainaxil, 

 it will be remembered, occurred in a speeimen of C. pugil. 



Ornament: Traces of slight shagreen ornament are preserved. 



Stem: 23 mm. are preserved attached to the cup; it is curved lik ^ a swan's neck 

 when the head is drawn back. It is thinner proximally, and here as usual the ossicles 

 are lower, with a few still lower ones inserted. In the proximal portion a strong sagittal 

 ridge is observable. In the distal portion the width is 2.75 mm., and 6 ossicles run to 

 5 mm.; thus the height of the ossicles is just twice as great as in C. gotlanäicus. 



This species was not figured by Angelin. 



Localities: Follingbo, (f); Lilla Carlsö (f), coll. F. A. B. 1892. Not known ont 

 of Gotland. 



Calceocrinus tenax, n. sp. 



(Plate III, fios. 109—115.) 

 Diagnosis. 



Proportions of cup are, — height 1; width 1.25; width at hinge 1.04; thickness 0.86. 

 Cup seen from 1. ant. radius roughly quadrangular, low, with upper angles rounded off; 

 constriction very slight. 1. ant. R s and R' separated. T-piece: width below same as 

 height; widens considerably above; may touch the mainaxils. x more than twice as wide 

 as high; rests on T-piece and (?) on inferradial. 1. ant. arm hardly at all stouter than 

 adanal branch of primaxil-arm; apparently simple. Ant. and 1. post. arms have main- 

 axils up to Vlax. IBr 2. Axil-arms follow the normal type; their larger branches de- 

 crease considerably in size, and are closely apposed, entirely hiding the adanal branches 

 when closed. The arms are very smooth externally, but slightly ridged where pressed 

 against one another. Hinge with cross-processes distinct. Very faint traces of shagreen 

 ornament. Stem-ossicles show strong curvature, forming a sagittal ridge. 



This species is founded on two specimens, — (a) an almost eomplete crown with a 

 small portion of stem; (b) the arms of a slightly larger individual, rather broken. The 

 description, except when otherwise stated, follows a. 



