354 



Y. OKADA : 



form of a weak inflation of the central surface, situated near the center of 

 the zoarium. Ooeciostome short, projecting from the periphery of ooecium ; 

 its aperture circular, 0.08 mm. in diameter and directed outwards. 



28. Lichenopora buslii Harmer 1 91 5. 



Lichenopora buski, Harmer 1915 (2), 161, pi. xii, figs. 4, 5. 



Discoforella cilia/a, Busk 1875 (4), 31, pi. xxx, fig. 6; pi. xxxiii, fig. 4. — Haswell 187g (1), 354. 

 Lichenopora cilia/a, Waters 18S7 (4), 263, pi. vii, fig. 5.— Philipps 1899 (1), 441. 



A number of colonies are on hand. The localities are : Yodomi 

 62-72 fms. and Aburatsubo. 



29. Lichen opora imperial is Ortmann 1890. 



Lichenpora imperiatisi Ortmann 1890 (1), 64, pi. iv, fig. 25. 



There are in the collection numerous colonies which may be identified 

 with the above species. They were all obtained from shallow water in 

 Aburatsubo, close to the Marine Biological Station, where they are com- 

 monly found, attached on stones and seaweeds. Specimens in spirit white ; 

 in the fresh state, milky white, but frequently with a light yellowish tint. 

 The ovicell exists in most of the specimens. It is a weak inflation with 

 punctate surface and situated below the level of the ribs of cancelli. It is 

 either confined to the central area or extends farther outwards in the form 

 of lobes between every two raised rays of zooecia, frequently reaching 

 nearly to the zoarial margin. Ooeciostomes very short, generally situated 

 in the periphery of ovicell ; their aperture oblong, 0.04 x 0.08 mm. large, 

 situated in specially enlarged and elliptical cancelli surrounded by a very 

 much thickened rib. 



30. Lichenopora mediterranea Blaînville 1S34. 



Lichenopora mediterranea, Blainville 1834 (1), 407. — Michelin 1841-42 (1), 68, pi. xiv, figs. 5a, 

 5b.— Pergens 1889 fi), 7. — Carus 1889 (1), 46.— Neviani 1904 (1), 2. — Harmer 1915, 

 (2), 164, pi. xii, figs. 2, 3. 



Discoporella mediterranea. Busk 1875 (4), 33, pi. xxxlv, fig. 4. 



A few colonies which seem to be referable to the above species, exist 



