300 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. XXXIV. 
ferrieri, which fact, joined with the flatter lateral surface, makes the 
carina sharper and more prominent. 
Although the relationship of this form to O. ferrieri is very obvi- 
ous, and although both forms vary so much that the extremes ap- 
proach each other in some particulars, O. conoideus 1s a fairly well- 
marked form, deserving, it seems to me, specific distinction. 
Locality and horizon.—Phosphate beds; Montpelier, Idaho. 
Ty pe-specimens.—Cat. No. 53464, U.S.N.M. 
EXPLANATION OF PLA'TES. 
PLATE XUV. 
Heterocelia beedei, new species. 
Fic. 1. A fracture section through a specimen which seems to show branching 
x Ze 
2. A partly weathered specimen showing the position of the spout-like ostia 
which have been almost worn away. 
3. Thin section longitudinally cutting a distorted specimen. This section 
shows the general structure and especially the perforated cloacal 
tube X 3. 
4, A weathered specimen showing the structure X 2. 
A fracture section through a specimen in rock, Showing the length of the 
spout-like ostia xX 2. 
6. A fracture section through a specimen X 2. 
7. A weathered surface showing several specimens and their manner of 
occurrence. 
8. Longitudinal section through a specimen which has weathered free. 
This also shows the perforated cloacal tube X 2. 
Allen limestone, Chanute, Kansas. 
On 
PLATE XV. 
Meandrostia kansasensis, new species. 
Fig. 1. A thin section somewhat obliquely through a specimen. The cloaca 
shows in the lower part X 2. The dark material is rock, and the 
light, fossil. 
2. Another longitudinal section xX 2. 
3. A well-preserved specimen partly overgrown by a bryozoan. Some of 
the ostia are shown. 
4. Transverse section showing well-defined cloaca and about the usual 
amount of sponge tissue. 
5. Longitudinal section showing the cloaca and irregularly chambered 
walls X 2. As this is a ground surface, the sponge tissue, which is 
transparent in thin sections, is dark and the rock light. 
6. A transverse section, also ground, so that the light material represents 
rock X 2. The sponge tissue is here well developed with small cham- 
bers and cloaca. 
7. A thin section, transverse, with very open structure X 2. 
- Allen limestone, Chanute, Kansas. 
Steinmannia benjamini, new species. 
8. A fracture section longitudinally through a specimen X 2. The light- 
colored material is in this case rock. 
Allen limestone, Chanute, Kansas. 
