188 
BULLETS 106, UNITED STATES NATIONAL MUSEUM. 
SCRUPOCELLARIA WILLIARDI, new species. 
Plate SI, figs. 24-27. 
Description . — The segments in this species are thick and bear at least 10 
zooecia arranged alternately. The zooecia are not distinctly separated from each 
other, are pyriform and provided with a small proximal cryptocyst; their mural 
rim is rounded and with neither spines nor scutum ; the distal avicularium is very 
small and inconstant. On the dorsal the zooecia are indistinct ; here the vibraculum 
is quite large and bears a broad groove adjacent to which is a radicular pore, pro- 
jecting but little. 
M eosurements . — Op esi a 
ho=0 . 26 mm. 
l,o= 0.12 mm. 
Zooecia 
\Lz=0A0 mm. 
I lz =0.28 mm. 
Affinities . — In its pyriform opesium this ■ species is quite similar to the living 
S. retif ormis Smith, 1872, but it differs totally on account of its very large vibracu- 
lum, which above all is quite characteristic. 
The specific name is in honor of our friend. Mr. Thomas E. Milliard, of the 
United States Geological Survey, to whom we are indebted for many courtesies. 
Occurrence . — Vicksburgian (Marianna limestone) : Salt Mountain, 5 miles 
south of Jackson, Alabama (common). 
Vicksburgian (By ram marl): Near Woodward, Wayne County, Mississippi 
(rare). 
Cotypes.- — Cat. No. 64243, U.S.N.M. 
SCRUPOCELLARIA TRIANGULATA, new species. 
Plate SI, figs. 17-19. 
Description .— The segments are narrow, triangular in cross section, and bear 
12 to 14 zooecia arranged alternately. The zooecia are distinctly elliptical and are 
provided with a small proximal cryptocyst; the opesium is pyriform and narrowest 
anteriorly ; the mural rim is rounded and bears trace of a scutum ; the distal avicu- 
larium is simple and very small, ivhile the frontal avicularium is quite rare. On 
the dorsal the zooecia are distinct and a little convex; the vibraculum is large, 
slightly oblique, acuminate, and provided with a long, very oblique groove; the 
radicular pore is prominent. 
Measurements . — Opesia 
ho= 0.20 mm. 
lo— 0.10 mm. 
r, . [Z.e=0.36 mm. 
Zooecia n nQ 
fe=0.28 mm. 
Affinities— This species is closely related to Scrap ocellaria reticulata Smitt. 
1872, occurring in the waters off Florida. S. triangulata is distinguished, however, 
by its smaller dimensions, by the absence of the frontal avicularium and by its non- 
crenulated opesium. 
Occurrence . — Vicksburgian (Glendon member of Marianna limestone) : West 
bank of Conecuh River, 1 mile below mouth of Sepulga River, Escambia County, 
Alabama (rare). 
Holotype. — Cat. No. 64241, U.S.N.M. 
