608 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
is small, elongated, and formed of a large circular anter separated by two small 
triangular cardelles from an almost straight poster; the peristome is very thick, 
salient; it bounds an infundibuliform peristomie and bears eight spines. The ovi- 
cell is hyperstomial, recumbent, very small, little salient, smooth ; it is widely open 
in the peristomie. Laterally and near the apertura there is a small, oblique, little 
salient avicularium. 
,, , . f ha=0.15 mm. 
Measurements . — Apertura , „ . 
1 u< 2 = 0 . 10 mm. 
Occurrence . — Middle Jacksonian: Wilmington, North Carolina (rare): Bich 
Hill, Crawford County, Georgia (rare). 
Holotype.— Cat. No. 64219, U.S.N.M. 
HOLOPORELLA PISIFORMIS, new species 
PJate 77 , figs. 8-11. 
Description . — The zoarium is formed of. small, globular masses, of the size of 
a pea. The superficial zooecia are small, raised, and entirely smooth. The apertura 
is semilunar and provided with two large cardelles; 
the peristomice is very irregular; its proximal edge 
bears two lips more or less coalescent and sometimes 
a small oral, elliptical avicularium. The ovicell is 
hyperstomial, recumbent, globular, smooth, widely 
open above the apertura. The deep zooecia are visi- 
ble only by their apertura. 
,, . ’ha= 0.08 mm. 
Measurements . — Apertura 7 _ nhr 
L la= 0.07 mm. 
p— 
a-' 
Fig. 182. — Holoporella pisiformis, 
new species. 
A-C. Sketches showing varia- 
tions in the form of the peristomice. 
D. Sketch of apertura. a, mucro; 
c, cardelles; p, lateral apophysis; 
psp, pseudospiramen; r, rimule. 
Variations . — This small species is remarkable in 
the disconcerting irregularity of its peristomice 
hiding the apertura. Certain zooecia have a salient 
mucro (fig. 11) ; then the two cardelles are replaced 
by two peristomial apophyses separated from the 
mucro by two pseudorimules. Other zooecia bear two 
apophyses separated by a rimule (fig. 9); the latter may be joined (fig. 10), 
surrounding thus a sort of spiramen. All these details have the most minute 
dimensions. 
Affinities . — This species is well characterized by its small dimensions and its 
peristomial variations. It differs from Holoporella separata in its smaller zooecia 
and in the absence of pedunculate avicularia issuing from the deep zooecia. 
It differs from Holoporella micropora with small zooecial dimensions, in its 
more elevated zooecia, its smaller zoarium and in its much larger apertura (ha= 
0.08 and not 0.05 mm.). 
Occurrence . — Middle Jacksonian: Wilmington, North Carolina (common); 
Kich Hill, Crawford County, Georgia (rare). 
Cotypes. — -Cat. No. 64223. U.S.N.M. 
