238 M. MIYAJIMA : 



bilaterality. The hydrocaulus, which is attached not to the 

 center but to the edge of the hydranth, is nearly cylindrical and 

 increases in diameter from the attachment of the hydranth 

 towards the end which is fixed in the sandy sea-bottom. The 

 total height of the animal attains 700 mm., as measured from 

 the top of the oral tube to the attached base of the hydrocaulus. 



In the fresh condition the hydranth was rose pink and its 

 tentacles, both oral and marginal, were deep scarlet in colour, 

 while the gonosomes possessed light rufous colour. The hydro- 

 caulus was light pink in colour, being quite pale in its middle. 



The general features and the colours are Avell shown in 

 Fig. 1, PI. XIV, which was drawn from the preserved specimen 

 by Mr. Nagasawa, artist of our Institute, making use also of 

 the rough sketches I made at the time of the fresh object. 



Hydranth. 



The upper surface of the hydranth is flattened so that it 

 may be described as an *' oral disc." The lower surface, how- 

 ever, assumes a shallow funnel-shape, which passes downwards 

 into the hydrocaulus. This disc has an oval outline, but differs 

 from that of Branchiocerianthus urceolus, in having its sagiilal 

 diameter less than its transverse, the two diameters] [being res- 

 pectively 80 and UO mm. (Woodcut 2). 



At one end of the sagittal diameter is attached the hydro- 

 caulus where the circle of the marginal tentacles is also inter- 

 rupted. The plane of the disc is oblique to the long axis of the 

 hydrocaulus (Woodcut 1, I), though not to the same degree as 

 in Branchiocerianthus urceolus Mark. 



The edge where the hydrocaulus is attached I shall designate 

 the lower, and the opposite the higher, edge. 



