249 
tagonal, of the same form as the first radials, but relatively 
reversed. 
Arms, bifurcating frequently, very robust ; ossiculae broad, 
arranged in single series, with, inferior and superior margins 
parallel. The whole forming a very compact brachial plume 
capable of close apposition. 
Zeacrinus McCoyanus (De Koninck), Sladen. 
Ci(pressocrinns impressus, McCoy, Ann. Nat. Hist., ser. 2, 
vol. iii., p. 244. 
Foferiocnnus McCof/anus, De Koninck, Rech. s. les Crin. 
Carb. Belgique, p. 91, pi. 1, fig. 7. 
There is little doubt that this species is a true Zeacrinus ; 
apart from its general resemblance, the very character which 
led to McCoy's specific name is a striking feature in the genus. 
The trivial designation impressus, was pre-occupied by Phillips, 
for a true Poteriocrinus. 
Zeacrinus calyx (McCoy), Sladen. 
Ciipressocriniis calyx, McCoy, Ann. Nat. Hist, ser. 2, vol. 
iii., p. 244. 
Poteriocrinus calyx, De Koninck, Rech. s. les Crin. Carb. 
Belgique, p. 90, pi. 1, fig. 6. 
As a Poteriocrinus, this would be a most abnormal form ! 
It naturally associates itself much more closely with the 
present genus. More perfectly preserved specimens are, 
however, greatly to be desired. 
Zeacrinus granulosus (Phillips), Sladen. 
Poteriocrinus granulosus, Phillips, Gcol. Yorks., Pt. II., 
p. 205, pi. 4, figs. 2, 4, 8. 
The depressed calyx, the almost hidden basal plates, and 
the character of the radial articulating surfaces, all warrant 
the inclusion of this species in the present genus. 
Zeacrinus Phillipsii, mihi. 
I have no hesitation in referring the fine plume dcsig- 
