48 



ACTINIARIA 



longitudinal pennons, are strong, trianguloid and provided with numerous folds, particularly in the upper part 

 of the reproductive tract (textfigs. 47, 48) . The expansion of the parietal muscles on the column is considerable 

 and comprises about the whole breadth of the parietal muscles. The ciliated streaks are well-developed. The 

 specimen was a male. 



Fig. 46. 



Fig- 47- 



Fig. 48. 



Textfigs. 46 — 48. Edwardia islandica. 



Transverse section of pennon (fig. 46) and parietal 



muscles (figs. 47, 48) in the upper part of the 



reproductive tract. 



Edwardsia incerta n. sp. 



Diagnosis: Physa well-developed. Scapus with a thick ectoderm, incrusted with foreign bodies, 



with scattered, large nemathybomes, containing a few nematocysts 29 — ^J X 5 /i in size. Tentacles not more 



than 16, probably 12. Nematocysts of the tentacles 22 — 26 x 2 fx, the spirocysts 14 — 22 n in size. Longitudinal 



muscle pennons of the mesenteries in transverse-sections with some few, about 12 folds, only ramificated in 



the outer parts. The lamellar outer part of the mesenteries attached close 

 by the outside of the pennons. Parietal muscles comparatively well-deve- 

 loped, in transverse-sections fan-shaped, considerably broader than in E. 

 arctica. The parietal muscles are considerably expanded on the column. 

 Colour in alcohol: Scapus dirty grey. 



Dimensions in contracted state: length 0.9 cm, breadth o. 15 cm. 

 Occurrence: East-Greenland 72°28' N. 2i°48' W. 180 m mud 

 with some stones (Sw. Greenland-Exp. 1899) i sp. 



The muscle pennons of the mesenteries of these species recall those 

 of E. arctica ; the nematocysts of the nemathybomes, however, differ in size. 

 On account of the imperfect and badly preserved material I cannot give any 

 minute description of the species. A transverse-section of a nmscle pennon 



Textfig. 49. Edwardsia incerta. 

 Compare the text! 



and of a parietal muscle is reproduced in textfig. 49. 



