196 DEVONIAN FAUNA. 



Our fossil is distinguishable by its width, its erect radials arid spreading 

 basals, its very large columnal attachment, and its curiously elaborate, coarse, and 

 elevated sculpture. As it is defective above, there may be a question about its 

 height, but after repeated examinations my opinion is that the missing part was in 

 all probability very small indeed. 



The fragment of stem in Mr. Vicary's Collection is just like the piece which is 

 figured by Schultze. The other specimen differs in having alternating columnals 

 in four series — the first and third being simple flat rings, the second being larger 

 and convex but still very narrow, and the fourth being still larger and ornamented 

 with five or six high sharp tubercles. It seems uncertain whether this specimen 

 may be regarded as a different part of the stalk of the same animal, but I know 

 nothing else to which it is likely to belong. 



Affinities. — Of our English crinoids the only one which it approaches is 

 //. macrotatus, but that seems distinguished by the more regularly ovoid shape of 

 the calyx, by its less prominent ornament, and probably by its much greater height. 

 There would be little doubt that it is a distinct species, even apart from the fact 

 that it appears identifiable with a German fossil which is certainly distinct from 

 Austin's English form. 



5. Hexacbinus microglyphicus, Whidborue. Plate XXIII, figs. 1, la, 2, 2 a. 



1889. Hexacrinus microglyphicus, Whidborne. Geol. Mag., dec. 3, vol. vi, 



p. 79. 



Description. — Dorsal cup rather elongate, deeply cup-shaped, large. Attach- 

 ment of column small. Basal circlet large, deep, consisting of three plates, with 

 an hexagonal upper margin, and being slightly constricted below, so as to form 

 a slight rim ;it the base of attachment. Radials elongate, being rather higher than 

 wide, slightly convex at the lower margins, and slightly wider above than below. 

 Anal elongate with angular lower margin, and with sides which arch gently 

 inwards as they advance upwards, so that it is broader below than above. Surface 

 covered by numerous small pustules, which occasionally arrange themselves in 

 radiating lines. 



Size <;/' calyx. — The best specimen is 20 mm. high by 18 mm. wide. Another 

 is 45 mm. high. 



Localities. — From Wolborough there are three specimens in Mr. Vicary's 

 Collection, and i wo in the Torquay Museum. 



Remarks. — The material For this species is very poor, and it seems very 

 doubtful whether it should be separated from the specimens identified with 



