352 



Y. OKADA : 



zoarial periphery. Ventral surface of zoarium and marginal plate scantily 

 punctate. The spaces between zooecial rows transversely wrinkled. 



This new species is represented in the collection by a single specimen 

 which was found attached on a Hexactincllid obtained from a depth of 

 62-78 fms. at Yodomi. Characteristic of the species is the ampulliform 

 ovicell, on which account I have given it the specific name ampulliformis. 



24. Serenicea lineata (MacGillivray) 1885. 



Berenicea lineata, Harmer 1915 (2), 116, pl. xi, figs. 6, 7. 

 Diastopora liticata, MacOillivray 1885 (1), 96, pl. iii, fig. I. 



Diseotnbigera lineata. Waters 1887 (4), 260, pl. vi, fig. 24. — Waters 1893 (5), 28, pl. xv, fig. 5. 

 Diastopora prominent, Ortmann 1S90 (1), 64, pi. iv, fig. 38. 



A few small and large colonies, referable to the above species, exist in 

 the collection. They were all obtained from shallow water in Aburatsubo, 

 close to the Misaki Marine Biological Station. 



25. lievenicea ohelia (Johnston) 1847. 



Diastopora delia, Johnston 1847 (2), 277, pl. xlvii, figs. 7, 8. — Hincks 1862 (1), 467. — Smitt 

 1866 (3I, 10. — Heller 1867 (1), 123. — Busk 1875 (4), 28, pi. xxvi, figs. 1, 2. — Waters 

 1879 (1), 273. — Hincks 1880 (3), 462, pi. lxvi, figs. 10, 10a. — Bidenkap igoo (1), 528. — 

 Norman, 1903 (0, 575.— Calvet 1906 (2), 464.— Nordgard 1907, (1), 17. — Arndt 

 1912 (1), 129. 



Tubulipora obelia, Johnston 1838 (1), 269. 



Berenicea hyalina, Fleming 1828 (1), 533. 



Diastopora hyalina, var. obelia, Smitt 1866 (3), 356, pi. viii, figs. 9-12. 



A single specimen of this species, from Yodomi 62-78 fms., exists in 

 the collection. It is attached on Xcnophora shell. The adventitious 

 tubules have their opening partly above and partly below the level of 

 zooecial apertures. I mention this fact, because Waters has distinguished 

 the form from Franz-Josef Land under the name of Diastopora obelia, var. 

 arctica, on the ground that the adventitious tubules open all at a higher 

 level than the zooecial apertures. 



26. Berenicea rotunda n. sp. 



Zoarium circular, 1-5 mm. in diameter, bordered with thin wide 

 lamina ; the ventral surface slightly concave, the zoarium being thinnest in 



