236 The American Geologist. October, 1903 
one having a thecal length of 15 mm. there are about 21. 
Length of brachioles not definitely known, but those of the 
apical region not less than 11 mm., stout and with about 17 
pieces in each column. Ambulacral groove wide and covered 
by a complex series of small and large ambulacralia. 
Basal pectinirhomb smallest, having in the largest specimen 
about 80 grooves, that on plates 12 and 18 about 90, and the 
one on plates 14 and 15 is the largest with about 120. 
Hydropore minute, closely adjoining the madreporite. 
Anal pyramid depressed, consisting of 7 somewhat orna- 
mented plates surrounded by a circle of 8 larger plates of 
irregular size and decidedly sculptured. 
Column slender. Length unknown. 
Formation and locality. — Common in the Keyser quarries 
where it was first collected by Robert H. Gordon of Cumber- 
land, Maryland. The species is named for its discoverer in 
recognition of the very valuable services he has rendered not 
only as an enthusiastic collector, but also as a careful student of 
the complicated geology of western Maryland. 
Cat. number 35,071, U. S. N. M. 
Pseudocrinites stellatus n. sp. 
Length of largest specimen, 25 mm., breadth 23 mm., and 
depth about 15 mm. Mr. Hartley has a specimen 32 mm. long 
and 30 mm. wide. 
Ambulacra well defined, flat-topped, extending around the 
entire periphery of the theca and touching the column. Par- 
ambulacral plates large. Each ambulacrum has about 36 brach- 
ioles ; in a specimen having a thecal length of 15 mm. there 
are 24 brachioles. Brachioles not preserved. Ambulacral 
groove wide, roofed by a median double row of tiny angular 
ambulacralia arranged in short crescents, and outside of these 
by a single row of much larger, strongly elevated plates, each 
one of which is as large as two of the parambulacralia. 
Basal pectinirhomb with about 60 dichopores, that of plates 
12 and 18 with 80, and of 14 and 15 with 90. 
Madreporite quite large for Pseudocrinites, but the parietal 
pore is exceedingly minute. 
Anal area small, composed of two circles of plates, the out- 
er one has 7 nodose pieces and the inner depressed pyramid 
has the same number of plates. 
