BULLETIN OF THE LABORATORIES 
170 
side, but not so distinct, as it is mostly covered by, apparently, indu- 
rated clay.” (James, loc. cit.) 
Dr. L. B. Welch very kindly showed me the type specimen in his 
cabinet. The specimen is very unsatisfactory. The cell apertures 
were seen to have a strongly arched lip on one side, and were ar- 
ranged in diagonally intersecting rows, about 5 cells in a length of 2 
mm. I should be unwilling to attempt any further statements con- 
cerning it, and so have repeated the original description. Its general 
aspect seemed to be that of a much worn fragment of some species of 
Cera 7 nopora. 
Locality and position. Clinton Group, Clinton county; collection 
of Dr. L. B. Welch. 
xMONTICULIPORID^, Nicholson. 
Zoarium with tubular cells, which are thin-walled and polygonal 
below, above they are bent more decidedly towards the surface, are 
of nearly equal size throughout, more or less thickened and rounded, 
but never lipped nor separated by vesicular tissue. Zoaria usually ra- 
mose, occasionally frondose, or forming flat circular or irregular ex- 
pansions ; never composed of two distinct layers of cells entirely sep- 
arated by epithecal membranes. 
Genus PRASOPORA, Nicholson and Etheridge. 
Zoarium forming a hemispherical mass or a thin expansion, with 
a wrinkled epithecal membrane on the lower surface. Cells cylindri- 
cal or more or less prismatic, lined on one side with cystoid dia- 
phragms. 
XVIII. Prasopora parmula, sp 11. 
{Plate XV, Fig. 14; Plate XVII, Fig. 14.) 
Zoaria forming thin, flattened expansions which are lined by a 
wrinkled epithecal membrane on the lower surface ; circular when 
young, later becoming more irregular in outline. Typically the lower 
