Description of New Genera of Echinodermata. 15 
The calyx of this genus bears some resemblance to that of an 
Erisocrinus, but the pentagonal column and azygous.plate distin- 
guish it. The azygous plate truncates a subradial as in Delo- 
crinus, but otherwise there is no resemblance between the two 
genera. The long flowing arms composed of single plates and the 
remarkably large and peculiarly constructed proboscis characterize 
this genus and distinguish it from all others. Its family affinities 
would seem to be with the Poteriocrinide, but probably a new fam- 
ily should be defined for its reception. 
FESIOCRINUS MAGNIFICUS, Nn. Sp. 
Plate I1., Fig. 1, natural size of a specimen as it les on a slab; Fig. 
2, a free proboscis nearly entire and only slightly twisted; Fig. 3, 
portion of same magnified 2% diameters to show more dis- 
tinctly the respiratory openings; Fig. 4, an abnormal 
branching proboscis ; Fig. 5, sectional end 
view of proboscis. 
Calyx deep, bowl-shaped, surface of plates finely granulous; 
- sutures distinct but not beveled; basals forming a pertagonal flat- 
_tened disc having an outline about twice the diameter of the 
column; subradials rather large, four hexagonal, one heptagonal, 
bending abruptly upward from the union with the basals, the upper 
angle extending high between the first radials so as to make the 
upper sloping sides of the hexagonal plates much the longer; first 
radials larger than the subradials, about one-half wider than high, 
all pentagonal with lateral and inferior sides of equal length and 
upper truncated sides extending to the fullest width of the plates; 
first brachial plates wide, short, rounded, separated exteriorly from 
the first radials by a beveled suture; second brachials wide, short, 
with long upper sloping sides for the articulation of the large arm 
plates; arms ten, long, round exteriorly and composed of short 
cuneiform plates; pinnules short and rather thick. Proboscis 
remarkably large, long and composed of four series of gradually 
tapering convex, tuberculated plates, somewhat similar in appearance 
to four round tapering columns placed together, giving transversely 
a subquadrate outline; there 1s no azygous or anal opening in the 
proboscis, but there are numerous transverse, respiratory fissures 
or slits in the longitudinal depressions; these slits exist on both 
