630 BULLETIN" 106, UNITED STATES NATIONAL MUSEUM. 
Genus CONESCHARELLINA D’Orbigny, 1851. 
1851. Conescha rellina D’Orbigny, Paleontologie frangaise, Terrain Cretace, vol. 5, p. 446. 
The zoarium with lunoecia. The zoaria, which have the form of a low cone 
or an arched disk, only show a single layer of zooecia, while their inner cavity is 
Fig. 192. — Genus Corcescharellin a D’Orbigny, 1851. 
A-H. Conescha rellina cancell ata Busk, 1852. A. Zoarium, natural size and magnified. 
B. Internal face magnified. (A, B after MacGillivray, 1895.) C. Zooecia, X 25. D. Aperture, 
X 50. (C, D after Waters, 1882.) E. Avicularian mandible, X 85 and X 250. F. Operculum, 
X 85. (E, F after Waters, 1887.) G. Ovicell, X 55. H. Ovicell from the side. X 55. (G, H 
after Levinsen, 1909.) 
I-N. Conescliarellina angulopora Tenison-Woods, 1880. I. Between the two avicularia is 
seen one of the peculiar crescentic apertures belonging to certain kenozooeeia (zooecia of com- 
pensation), X 75. .T. A crescentic aperture and two avicularia, X 75. K. Operculum, X 100. 
L. A transverse section of the operculum, X 200, M. Aperture, X 75. N. Avicularian mandible, 
X 200. (I-N after Levinsen, 1909.) 
O-P. Conescliarellina incisa Hindis, 1881. O. Avicularian aperture. X 25. P. Oral aper- 
ture, X 25. (O, P after Waters, 1887.) 
Q. Conescliarellina philippinensis Busk, 1852. Five zooecia are seen from the basal side 
(after removal of the frontal wall), showing a number of avicularian chambers, which are con- 
nected partly with the zooecial surface and partly with each other through septules and pore 
chambers. There is also seen one of the peculiar kenozooeeia, which are provided with a narrow 
semilunate aperture, X 75. (After Levinsen, 1909.) 
occupied by numerous avicularia placed in horizontal layers; ovicells may occur. 
(After Levinsen, 1909.) The apertura has a distal rimule. 
