Lower Pnlfvozoic Griuoids of Bohemia. 



113 



fully recognize, their own interpretation of the fra;:]^mcnt tlocs 

 not ngree witli Angelin's diagnosis of liis genus. Their 

 interpretation is that the fragment represents the lower portion 

 of a cu]i, coTisisting of 3 basals, 5 radials, each followed bv 

 about two thirds of a broken priniibrach, and 5 large inter- 

 radials, all but one reaching from the basals to the same level 



... f' 



Fifr. r>. — The so-called Catpiocriuus? r ? bnhemiciin, after Waagen and 

 Jahn, pi. lix. figs. 7, 8, ; x ^ diani. a, " calice incomplet, vu 

 d'en bas,"' but from above if regarded as a root. /;, from the 

 side, in what W. & J. consider the normal position, but upside 

 down if it be a root, c, " vu d'en haut," but showing the 

 surface of attachment to the sea-floor if a root. 



a.s the broken top of the first primibrachs. It is admitted 

 that all the plates are extremely irregular. This point, 

 however, need not be laboured, for a glance at Mr. Swoboda's 

 drawing of the alleged U|)per surface (pi. lix. fig. 9 ; our 

 Fig. G c) is enough to suggest — nay, to force upon one — a very 

 different interpretation. The published figures having failed 

 us so Constantly, it may seem the height of rashness to take 

 their evidence in opposition to the opinio'i of two eminent 

 naturalists who have devoted so many years to the study of 

 these fossils. But no human being could have drawn that 

 figure 9 without having either before him or in his mind's 

 eye the root of some stalked Echinoderm. Here is faitiifully 

 represented the flat surface of adhesion to the sea-floor, with 

 grooves, like those of Lichenocrimis and other genera, 

 radiating from the central cavity. Within that cavity are 

 shown what the authors themselves describe as " ccailles 

 nombreuses, imbriquecs, ornces dc cotes fines longitudiiiales, 

 et traversucs jjar un grand nombre dc petitscanaux radiaires." 

 This is no description of the thecal cavity of any fossil 

 crinoid, but is ])crtectly intelligible in the light of certain roots 

 well known to geologists in North America. As for an 

 appearance of pentamerous symmetry in the outer plating, 

 Avv.d- Mag. N. Hist. Ser. 7. Vol vi. 8 



