78 
Genus— PEBIECUOCBINUS, Austin, 1842. 
BeriechocriniteSy Austin, Ann. Mag. Nat. Hist., 1842, X, p. 110. 
5 , Austin, Ibid, 1843, XI, p. 203. 
Saccocrimis, Hall, Pal. N. York, 1852, IT, p. 205. 
5 j Meek and Worthen, Illinois Geol. lieport. Pal., 1868, iii, p. 347. 
BeriecllOCrinus, 'VVachsmuth and Springer, Eevisiou of the Palffiocriuoidea, Pt. 2, 1881, 
p. 127 (301). 
Ohs . — A simple imjterfect sjtecimen is provisionally referred to this 
genus of tlie Actinocrinida?, from its close concordance with the general 
appearance and order of the jilates of those forms termed by many American 
Palteontologists Saccocrimis, -which were united by Messrs. Meek and 
AVorthen with Beriechocrinus, Austin. 
Perieciioceinus indicator/ sp. nor. 
PI. XXII, Pig. 4. 
Ohs . — Portions of two hasals arc ju’eserved, surmounted liy three hex- 
agonal first radials, much longer than wide, and subangular in the direction 
of their longest diameter. The middle radial hears, evidently in the direct 
line of a ray, a second radial, also hexagonal, but less vertically elongated 
than the first. This again supports a third radial, the length and breadth of 
which is about equal, although hexagonal in shape. On the third radial arc 
placed tv/o smaller secondary radials of doubtful form, arising from imperfect 
preservation. The first inter-radial i)late is quite as large, if not larger, than 
fhe second radials, and is liexagonal in outline. It is surmounted by tivo 
second inter-radial plates, apparently heptagonal, and these support two other 
rows of smaller plates of doubtful form, arising from their rather crushed 
condition. A similar structure to that now described is repeated in the inter- 
radius on the opposite side of the centrally-placed radial. 
The specimen consists of a portion of an internal cast, on which the 
positions of the sutures are represented by raised lines. The general arrange- 
ment of the plates indicates that it is a member of the Actinocrinidae, whilst 
' Ememled, Wachsmuth and Sjiringer, Revision of the Fateocrinoidea, 1881, Ft. II, p. 130. 
* Indicative of the presence of the genus in our rocks. 
