734 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
MECYNOECIA LOBATA, new species. 
Plate 157, figs. 1, 2. 
Description. — The zoarium is a Prohoscina , creeping on shells; it is formed 
of pluricellular branches, bifurcated, and irregularly lobed. The tubes are in- 
distinct and very short; the peristomes are thin, very near one another and ar- 
ranged in quincunx. The ovicell is small, little salient, little elongate; the 
oeciostome is as large as a tube, transverse, placed on the peristomie of a tube. 
iir , f Distance between the peristomes 0.14-0.16 mm. 
Measurements— a n 
l reparation ol the peristomes 0.40 mm. 
Occurence. — Vicksburgian (Marianna limestone) : Near Claiborne, Monroe 
County, Alabama (rare). 
Holotype. — Cat. No. 65397 U.S.N.M. 
MECYNOECIA GLOBULA, new species. 
Plate 157, figs. 3, 4. 
Description . — The zoarium incrusts bryozoa; it is a Prohoscina with club- 
shaped branches. The tubes are short, little distinct, somewhat striated trans- 
versally, bent upward at their extremity and terminated by a short peristomie 
elevated vertically; the peristome is thin and orbicular. The ovicell is little 
elongate, globular , smooth, symmetrical ; the oeciostome is ' elliptical, transverse, 
as wide as the tube bv which it is supported. 
( Diameter of the peristome 0.10 mm. 
Measurements . — Distance between the peristomes 0.40 mm. 
I Separation of the peristomes 0.46-0.50 mm. 
Occurrence. — Vicksburgian (Marianna limestone) : One mile north of Monroe- 
ville, Alabama (rare). 
Cotypes. — -Cat. No. 65398, U.S.N.M. 
Forma ENTALOPHORA Lamouroux, 1821. 
We introduce in this zoarial genus or forma the species with the tubes open- 
ing on all sides of the cylindrical branches, but in which no ovicells have been 
discovered. Most of the species hitherto referred to Entdlophora , have the elon- 
gated ovicell of M ecynoecia. 
ENTALOPHORA STIPATA, new species. 
Plate 108, fig. 16. 
Description . — The zoarium is cylindrical, club-shaped; the tubes are indis- 
tinct, arranged in regular quincunx and transversal verticells; the peristomes 
are quite close , thin, little salient, orbicular. 
(-Diameter of the peristome : 0.12 mm. 
Measurements . — j Distance between the peristomes 0.30-0.36 mm. 
[ Diameter of the branches 1.00 mm. 
The figured specimen only has been found, but it is quite characteristic. 
