248 I^Ii-. F. A. Bather on 



Redescription. 



The Austin Collection of Echinoderras, accorapanied by a 

 list in the handwriting of Fort-Major Anstin, is in the 

 Public ]\[useum of Liverpool, and contains a fair number of 

 the specimens described or figured by the Austins. The 

 specimens are gummed on wooden tablets, and provided 

 with labels copied from the somewhat unclenr iMS. list. 

 When, thanks to the facilities afforded by the Director, 

 Dr. Clubb, I recently made a careful inspection of the 

 collection, I found only two tablets purporting to bear 

 specimens of this genus. They were labelled " (309) Lijco-^ 

 crinus anapetalamenvs " and " (370) Lycocrinus jacksoni,'' 

 a circumstance which possibly explains why Sycocrinites 

 aiinpcptomcnus had been lost sight of. 



Taking now the evidence of the drawings (reproduced on 

 Plate X., with Austin's original numbering 2-4 A), of the 

 ]\1 S. list, of the tablets, and of the specimens on the tablets, 

 I propose to deal with the three s])ccies in order. 



Sycoa'inus jacksoni. 



Tablet 370 ii\ the Austin Collection is labelled as bearing 

 this species, which siiould be represented by a single theca. 

 But the sole specimen on the tablet is a very clear example" 

 of the blastoid " Astrocrimis tetragonus Austin,'' which, 

 without much doubt, has fallen off tablet 371, to which it 

 properly belongs and where there is a gummed sjjace for it, 

 and havs been stuck by mistake on tablet 370. The original 

 si)ecimen 370 must have disappeared before that took place, 

 and is not likely ever to be found. 



The MS. list says that the original specimen came from 

 the Carboniferous Limestone of Settle. This runs counter 

 to Von Hueh's suggestion, based on the description, tliat the 

 siK'cimeu was a Cryptocrinus. llenewed examination of the 

 lignn-s in this new light is required. 



'I'hc drawings (PI. X. figs. 4-4 Z*) represent a theca eom- 

 j)Osed of three circlets of plates. The proxiinal circlet 

 consists of one small and two large plates, together forming 

 a pentagonal base (fig. 4/j). The second circlet consists of 

 five pentagonal plates, with the shield shajjc characteristic of 

 ordinary radials. Tiie third, or u])permost circlet consists 

 of live tViangtdar plates, not alternating with the radials hnt 

 continning them in tiic same way as ordinary brachials. 

 On one of these plates, apparently a little below and to the 

 left of its centre, is a circular excrescence, which in one 



