144 Mr. F. Chapman on some 



The specimens from Gotland are small detached corallites 

 of tiie early stages of Sijringopora. They are remarkably 

 like yl^^oywm and Cladochonus in general appearance; and 

 this bears out ^lessrs. Edwards and llaime's statement that 

 "young specimens of this coral equally resemble Anlopora.'''' 

 It has previously been recorded from Dudley and Beathall 

 Edge in Britain and from Gotland. 



{Silurian ; Mulde, Gotland. Common. 



EC BIN ODER MA TA . 



Sub-branch PELMATOZOA. 



Class CRINOIDEA. 



[Some fragments of Crinoids were found in the washings of 

 the Mulde clay, and Mr. Bather has been good enough to 

 write the following note upon them.] 



EntrockuSf gen. et sp. indet. 



ACrinoid stem-fragment of five columnals (PI. III. fig. 5), 

 total length 5'5 millira., width 1'5 millim. ; each with slightly 

 concave sides, marked, however, with faint pustules, tending 

 to concresce into a ridge at half the height of each columnal. 

 Lumen small and apparently circular. Facet (fig. G) with 

 about twenty-eight radiating ridges, not very marked or 

 regular and not reaching the margin, so that the suture is not 

 creuulate. 



TrochitcB, gen. et sp. indet. 



A series of six columnals of delicate and beautiful appear- 

 ance. The body of each is pentagonal in section, about 

 •8 millim. wide, with small pentagonal lumen, the angles of 

 which alternate with those of the columnal. Tlie facet (fig. 9) 

 shows five marked grooves (or the ridges that engage in those 

 grooves, as the case may be, fig. 8) which pass from the 

 angles of the lumen to the sides of the facet, which they 

 bisect, and to a slight extent render the periphery quinque- 

 lobate, reminding one of a Tudor rose. The body of the 

 columnal bears at half its height a thin flange, circular or 

 slightly angular in outline, the angles in the latter case 

 corresponding to those of the body of the columnal; total 

 width 1*75 millim.; breadth of flange '5 millim. A similar 

 flange is seen in certain Devonian columnals usually assigned 

 to lihodocrinus, but on what evidence I know not. 



