BRYOZOA OF THE PHILIPPINE REGION 247 



Family HIPPOTHOIDAE Levinsen, 1909 



See Canu and Bassler, 1920, for description of this family and its 

 genera. 



Genus HIPPOTHOA Hincks, 1880 



HIPPOTHOA FLAGELLUM Manzoni, 1870 



Plate 22, fig. 7 



1889. Hippothoa flagellum Jelly, Synonymic Catalogue of Marine Bryozoa, p. 112 



(bibliography). 

 1889. Hippothoa distans MacGillivray Prodromus Zoology Victoria, Decade 



19, p. 321, pi. 187, fig. 10-13. 

 1900. Hippothoa flagellum Neviani, Bryozoi neogenici delle Calabrie, Palaeon- 



tographia italica, vol. 6, p. 146 (sep. 32). 

 1903. Hippothoa flagellum Jullien and Calvet, Bryozoaires, Re'sultats des 



Campagnes scientifiques du Prince de Monaco, fasc. 23, p. 87. 

 1905. Hippothoa flagellum Neviani, Bryozoi fossili de Carrubare (Calabria), 



Bollettina della Societa Geologica italiana, vol. 23, p. 515, fig. 2. 

 1907. Hippothoa flagellum Calvet, Expeditions scientifiques du Travilleur 



et du Talisman p. 423 (bibliography). 



Affinities. — It is quite true that Hippothoa distans MacGillivray, 

 1868, is synonymous with Hippothoa flagellum Marsson, 1870, and the 

 first author would have had right of priority if he had figured his 

 specimens. 

 Occurrence. — 



D. 4807. Cape Tsiuka, Sea of Japan; 41° 36' 12" N.; 140° 36' E. 

 D. 5137. Jolo Light, Jolo; 6° 04' 25" N.; 120° 58' 30" E.; 20 



fathoms; S. Sh. 

 D. 5144. Jolo Light, Jolo; 6° 05' 50" N.; 121' 02' 15" E.; 19 



fathoms; co. S. 

 D. 5145. Jolo Light, Jolo; 6° 04' 30" N.J 120° 59' 30" E.;^ 



fathoms; co. S., Sh. 

 D. 5356. Balabac Light, N. Balabac Strait; 8° 06' 40" N.; 117° 

 18' 45" E.; 58 fathoms; S., Sh. 

 Geologic distribution. — Pliocene: Zanclean of Italy (Seguenza), 

 Plaisancian of Italy (Manzoni), Astian of Italy (Seguenza), Sicilian of 



median pore is becoming delimited by the simultaneous growth of the median 

 tongue (tg) of calcareous matter and the lateral processes (I. p.). The parietal 

 muscles (p. m.) radiate towards a mass of tissue at the base of the operculum; 

 (c. p.) septules. I. Older zooecium, with completely calcified walls. The com- 

 pensatrix (c. s.) now possesses a distinct cavity, but is still of small extent (cor- 

 responding to fig. C). J. Mature ovicell, borne by a fertile zooecium which has 

 an ordinary zooecium on its proximal side. K. A fertile zooecium with a young 

 ovicell {ov.) represented by a concave plate which will constitute the inner wall 

 (i. w.) of the ovicell, and by a second plate, which will form the outer wall (o. w.). 

 The cribrilinelike frontal bars (J. b.) differ from those shown in Figure 1 in cor- 

 relation with the presence of an ovicell (ov.) on the proximal side of the zooecium. 

 On the distal side of the young ovicell (ov.) is a still younger fertile zooecium 

 whose frontal bars are only half developed. (G-K. After Harmer, 1902.) 



