250 



Sir. F. A. Bather on 



Sijcocrinus anapept.nnenus. What that form really is, we 

 uovv enquire. 



Si/cocrinus anapeptamenus. 



Tablet 369 in the Austin Collection should, according to 

 the MS. listj bear three specimens of this species^ from the 

 Carboniferous Limestone of Settle, Yorkshire. One of these 

 specimens has disappeared, as had already been noted on the 

 copy of the list made by a former curator of the museum. 

 One of the two remaining specimens proves to be only some 

 plates of a PalcEchinufi with no trace of any crinoid. The 

 third specimen is not the one drawn by T. Austin, jun. (our 

 PI. X. figs. 2-2 d), but is of the same general character 

 and agrees with the published definition. There is no 

 reason for doubting that this extant specimen was among those 

 before the Austins when they drew up their first account of 

 the genus^ and I therefore select it as the holotype of the 

 species. 



IBB 



Analysis of the ciq) of Si/cnm'nus nnnpi'ptumpnus, lectn-liolotypp. Sut nl'i'- 

 liiies iufiiiTed from iiiiii kings on tlio internal cast alonV, or otitlitit's 

 otherwise restored, are in dott'.'d line. The luissinj,'- portion of 

 1. post. K was broken off in removing' the tliick gnm and inntrix 

 from the specimen ; the outline is fully warranted. X 3 dinm. 



The specimen (PI. X. figs. \ a-\ c) cor.sists of a theca 

 devoid of all plates above the radials and somcwliat broken, 

 but the disposition of all the cup-plates can be determined 

 (text-fig.). The theca is asymmetrical, there being a general 

 lessening in height, in all circlets, from the 1. post, radius to 

 the r. ant. interradius. 



The height of the theca from the stem-facet to the summit 

 of 1. ])ost. R., is 9-7 mm. ; to the summit of the r. ant. inter- 

 radial suture, 7'7 mm. Diameter : antero-posterior, G"4 mm. ; 

 ti'ansvcrse^ about tlie same. 



