. Bulletin - United States National Museum. Science. BRYOZOA OF THE PHILIPPINE REGION 255 Biology.—Petralia japonica lives at all depths of water from 16 to 262 meters. It does not like waters too calm or too warm and we see it descend in depth on approaching the equator; the locality of the deepest, Sibutu, is situated at 4° 54' N. latitude. Occurrence.— D. 5311. China Sea, vicinity Hong Kong; 21° 33' N.; 116° 15' E.; 88 fathoms; crs. S., Sh. D. 5579. Sibutu Island, Darvel Bay, Borneo; 4° 54' 15" N.; 119° 09' 52" E.; 175 fathoms; fine S. Co.; ° C. Geographic distribution.—Sea of
. Bulletin - United States National Museum. Science. BRYOZOA OF THE PHILIPPINE REGION 255 Biology.—Petralia japonica lives at all depths of water from 16 to 262 meters. It does not like waters too calm or too warm and we see it descend in depth on approaching the equator; the locality of the deepest, Sibutu, is situated at 4° 54' N. latitude. Occurrence.— D. 5311. China Sea, vicinity Hong Kong; 21° 33' N.; 116° 15' E.; 88 fathoms; crs. S., Sh. D. 5579. Sibutu Island, Darvel Bay, Borneo; 4° 54' 15" N.; 119° 09' 52" E.; 175 fathoms; fine S. Co.; ° C. Geographic distribution.—Sea of Japan: Cobie, 8-50 fathoms (Busk); Sagamibar, Kadayama, slight depths; Maizuru, 35-40 fathoms (Ort-. Fig. 105.—Opercula of Petralia and Petraliella, X85 A-E. Petraliella crassocirca, new species. A. Operculum with wide band, little chitinized. B, C. Two opercula with chitinized bands. D, E. Two variations. F. Petraliella vorax, new species. G. Petralia japonica Busk, 1884. mann); island of Enoshima near Yokohoma (Waters). China Sea: Formosa channel, 270 meters (Levinsen). Indian Ocean: Mauritius (Kirkpatrick), Trincomalee (Hincks). Gulf of Manaar (Thornely), Natal (Waters), Wasin, British East Africa, 10 fathoms (Waters). Red Sea: Khor Dongola, off Shukak, 9 fathoms, Bay of Agig Suraza (Waters). Plesiotype.—Cat. No. 7999 Genus PETRALIELLA Canu and Bassler, 1927 The ovicell is hyperstomial, never closed by the operculum, buried in the distal zooecium. The shield-like area is very well developed but irregularly around the aperture; it is very often bipartite; it bears almost always two small lateral avicularia; in its proximal portion a large avicularian umbo often appears. Twenty-five tentacles. Genotype.—Petraliella (Escharella) bisinuata Smitt, 1872. Range.—Miocene— Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations
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