Stephenson — Certain Actiniaria collected off Ireland. 119 



2. SI!.. 1242. Aug. 14, 1911. 56 miles W. 1 S. of Great Skellig. Lat. 

 N". 51° 27'; Long. W. 11° 55'. 550-590 fathoms. Trawl. L young specimen 

 with a Bolocera. 



.'!. One large specimen, with no label. 



Measurements. — (i) Largest specimen. Diameter of oral disc and tentacles, 

 12 cm. ; of mouth, 5 - 3 cm. ; of pedal disc, 4*5 cm. ; height of column, 7'5 cm. : 

 length of a large tentacle, 2 cm. 



(iij Smallest specimen. Diameter of oral disc and tentacles, 6 cm. 



External characters. — Pedal disc in all cases much smaller than oral disc, 

 so that the body is cup-shaped. Pedal disc Hat or hollow, round or irregular, 

 much cockled, more or less radially striate. Form of body variable according 

 to slate of expansion or distortion. (See PI. XIV, fig. 5.) Limbus well 

 marked ; margin tentaculate, the outer tentacles, which are mere knobs, • 

 passing into it. Bodywall very thick and hard, thickly covered in its upper 

 part, in all cases, with irregular tubercles and prominences. In some cases 

 these extend almost to the limbus, getting smaller and less marked as they 

 approach it ; in others the lower part of the body is almost smooth. In the 

 largest specimen the oral disc is widely .expanded, and is purely oval in shape. 

 In the other cases, where it is more or less folded up, it forms a deep cup, and 

 its outline is rather irregular or wavy, though not definitely lobed. Disc very 

 broad, thin-walled. Eadii distinct, corresponding to the larger tentacles, not 

 reaching the moutli, and clearly transversely striated. Mouth large, with 

 prominent lip, and always two* well-marked actinopharyngeal grooves. The 

 tentacles (PI. XIV, figs. 7, 8 ; PI. XV, fig. 7) are arranged in 5 cycles — on the 

 plan 6, 6, 12, 24, 48, 96 = 192, this formula sometimes being departed from in 

 small details. In the largest specimen part of a 6th cycle has appeared. 

 The twelve innermost tentacles stand out clear on the disc, and the others are 

 arranged between them in 12 little wedges, the apices of the wedges pointing 

 toward the mouth. Inner tentacles much larger than the outer, and here 

 and there one or more tentacles are aborted, making the size rather irregular. 

 Each tentacle is provided with a bard whitish swelling of the mesogloea on the 

 outer side at the base, very well marked where best developed. The tentacles 

 themselves are thick-walled, provided with distinct terminal pores, and arc 

 longitudinally and transversely wrinkled. 



The body is creamy white except in the smallest specimen, in which it 

 has a pinkish tinge. In four specimens, the disc andsoft parts of the tentacles 

 are a rich deep purple-brown ; in another the colour dies pff in pain- greyish- 

 brown on the tentacles. The largest specimen is a lighter grey-brown, but 

 looks as if it may have originally been darker. The internal parts of the 

 body are in all a deep rich brown, except for the pale yellow gonads. The 



