ACTINIARIA 



29 



Edwardsia tuberculata Diib. and Koren. 



PI. I. Kig. 20. 

 Edwardsia tuberculata u. sp. Diiben and Koren 1847 P- 267. 



— — Diib. & Kor., Koren 1857 p. 93. Sars 1861 p. 262. 



O. & R. Hertwig 1879 PI. i. figs. 2, 6. 



— clavata Rathke p.p. Andres 1883 p. 308. Carlgren 1893 a p. 12. Appellof 1895 p. 7. 11 Grieg 



1897 p. 12. 



— ? — Rathke. Appellof 1891 p. 12 figs. 10 — 11. 



Diagnosis. Physa well-developed. Scapus with a rather well-developed periderm and 8 distinct 

 lines of large, rather few nemathybomes. Nematoc}^sts of the nemathybomes partly 60 — 96 X 2.5 //, partly 

 (72) no — 190 X (4) 5 — 7 n- Nematocysts of the capitulum 11 — 13 X 1.5 /i- Tentacles 16. Neinatocysts 

 of the tentacles 18 — 26 X about 1.5 [i, their spirocj^sts 14 — 22 X 2.5 /y. Nematocysts of the actinopharynx 

 partly typical 22 — \^y X 2.5 /i, partly with discernible basal part to the spiral thread 27 — 34 X 5 — 6//. 

 Longitudinal muscle-pennons strong, in transverse sections elongated, in the upper part of the reproductive 

 region with about 30 lower and higher, sparse, often dichotomously ramificated folds. Outer folds, in propor- 

 tion to the inner ones, only slightly branched. Outer lamellar part of the mesenteries in the reproduc- 

 tive region attached to the pennon rather close to the centre. Parietal muscles strong, with numerous folds 

 (15 — 20 or more on each side), high, rather perpendicularly issuing and a little branched. The extension of 

 the parietal muscles on the column very inconsiderable. 

 Colour. Scapus commonly brown. 



Dimensions in strongly contracted state with the physa involved unto about 2 cm long and 0.7 

 cm broad. 



Occurrence: Norway. Bergen (Koren, Appellof) Bergen, Manger 15 fms. (Sars) Bergen Herlo 



fiord 6 — 12 fms. (teste Appellof) , Molde (teste Sars), Utne fiord 100 fms. 

 (Bowallius 1882), Vaags fiord, Skavo-Tomberviken 40 — 80 fms. (teste 

 Grieg), Halnaesviken (teste Grieg), Drontheim fiord Rodberg 150 — 200 m 

 (Ostergren 1891) Norway without distinct locahty (I^iitken). 

 Sweden. Koster fiord N. Hellso 100 — 150 fms. (C. Auriwillius 1895), Sneholmen 



(C. Auriwillius 1895), Vaderoame 60 — 80 fms. (1911). 

 Denmark. Cattegat (Petersen). 

 S. of Iceland 63°i5' N. 22=23' W. 326—216 m (Thor-Exp. St. 161). 



Exterior aspect; The physa is well-developed, but commonly involved. The scapus is provided 

 with a rather strong cuticle. The large but few nemathybomes are arranged in 8 distinct, longitudinal lines 

 and appear ver>- distinctly as papilhform off-shoots on the scapus. The scapus, as well as the capitulum, are 

 polygonal, at least in the contracted state of the animal. The tentacles are 16, cylindrical, in contracted 

 state rather thick. The actinopharynx is longitudinally sulcated. 



Anatomical description: This species has before been anatomically examined by O. and R. 



