ZOANTHARIA 



as the material is so small and not very well-preserved, I have preferred to consider this colony as a 

 variety of E. danielsseni, the more so as the anatomical investigation is incomplete. 



Dimensions of the largest polyp: length 0-4 cm., breadth in the capitular region 0-45 cm. 



Colour in alcohol: grayish with black sand-grains. 



External appearance: the polyps were cylindrical, broader in the capitular region. The 

 distal margin is truncate, the upper part sunken. The capitular furrows are indistinct. The incrustation 

 was not so strong as in the main form and mainly restricted to the outer part of the mesoglcea. 



Anatomical description. Regarding the inner structure the lower part of the body-wall 

 contains in the ectoderm numerous nematocysts with greatly twisted thread (length 2436/4, breadth 

 ii 12 ft), in the capitular region similar capsules often occur (length 29 31^, breadth only 7 ft}. 



The sphincter was very strong, resembling that in the main form, but not drawn out so much 

 as in the latter. 



The ectoderm of the tentacles contains numerous spirocysts, fairly many nematocysts of the 

 same kind as in the capitulum (length 31 36^, breadth 7^) and a few thick-walled capsules (length 

 14 17 fjt}. Similar capsules are also found in the oral disc. 



The oesophagus contains numerous narrow, thick-walled nematocysts (length 19 22 ft). I cannot 

 determine the number of mesenteries with any certainty, but it must be about 32 or a little more. 



The glandular tract of the filament is provided with very few, uniformly broad capsules of 

 the same kind as in the lower part of the body-wall (length 2936^, breadth 12 ft) and with many 

 capsules like those in the capitular region (length 29 38^, breadth 7 ft). Further, many thick-walled, 

 narrow nematocyst capsules occur (length 1922^) and thick-walled capsules with distinct basal part 

 to the spiral thread, which are broader at the one end (length about 



Epizoanthus roseus Dan. 



PI. 3, fig. 4, PL 5, fig. 6. 



Epizoanthus roseus n. sp. Danielssen Norwegian North Atl. Ex. 1890. Actinida Tab. 6 fig. 10 Tab. 25 



figs. 4 6. 



Occurrence: 7i25 / N., i54i / E. clay 1134111. Bott. temp. ro. Norw.-North Atl. Ex. 1877 

 19.7 B. M. R. M. 



Dimensions. The polyps reach a length of up to i5mm. (Danielssen). In the preserved 

 state the length of the largest polyp was about ri cm., largest diameter a little under the tentacles 

 0-5 cm., smallest diameter 0-3 cm. 



Colour. "The sarcosoma is semi-transparent, grayish. The polyp is grayish-yellow owing to 

 the incrusted sand, but the rose-red integument shines through. The oral disc is rose-red with lighter- 

 coloured radii. The tentacles are, upon their lowest broad part rose-red like the oral disc, but upon 

 their superior half are paler in colour and almost white at the point" (Danielssen). In the preserved 

 state they are dirty sand-coloured. 



External appearance. The polyps are connected with each other by a flat ccenenchyma 

 of moderate size. The single polyps are placed quite close to each other. With regard to shape the 



