Echiiioilcnimta and a A'rrc Brachiopod. — Koiclcy. 2j^ 
Stribalocystis missouriensis Kowky. 
PUATE XVI. l-IGS. 23. 24. 
'This litilc cystoid was described in the .Imcrtcaii Geolo- 
gist fur l\l)riiary, u;oo. i)a<^c 71. and fiij^urcd on plate Tl. 
(Figs. 40. 41). There is an excavation in the liasal plates for 
a medium size, round column with a central canal, apparently 
round. Of the four plates of the basal ring the larger two 
are pentagonal and the smaller two ([uadrangular. Resting 
ui>on these four plates is a ring of six larger ones, two of 
which are pentagonal, two hexagonal and two heptagonal. 
These are variable in size, the pentagonal being smallest. 
There are eight plates in the next ring and about sixteen 
smaller ones in the ventral disk. 
There is a small anal o])ening near the edge of the disk 
and six or seven other small perforations just above the third 
row of calyx plates. Around four of these latter canals are 
surfaces apparently for the rece])tion of arm bases. All of 
the plates are quite convex and ornamented by strong radiat- 
ing ridges or a central node and ridges. 
Figure 2;^ is a side view of the type specimen and figure 
24 a basal view of a much smaller specimen. 
Locality and horizon same as the last. , 
Stribalocystis? elongatus Rowley. 
Plate XVI. Figs. 25, 26. 
This little cystidean is almost certainly not stribalocystis. 
The only two specimens collected are iml>edded in the lime- 
stone in such a wav as to make uncertain the number oi plates 
to the ring. 
There are either three or four elongate basal plates, four 
or five in the second ring, five or six smaller i)lates in the 
third row. six or seven still smaller ones in the fourth row 
and a number of small crowji plates. 
Neither of the six'cimens show any openings, pectinated 
rhombs, or appendages except a short piece of the column. 
The stem is quite large and the jiart attached to one of the 
s]:)ecimens lias seven joints as in figure 25. 
This species was described in the b^bruary. njoo. ,\MKk- 
ic.\x ( JEoLoc.iST. page 71 and figured on plate 2 (figure 39). 
Collected from the Dehhyris limestone at Red Rock Landing. Pern,- 
Co.. y\n. 
