ACTINIARIA 



37 



nemathybomes, seen from the surface, in a very extended specimen. In contracted animals the nema- 

 thybomes are still more closely packed (textfig. 26). The nematocysts of the nemathybomes are of two 

 sizes, partly 36 53 x 2.5^, partly 62 74 X 5/1, the latter are often a little curved; one part of the 

 nematocysts appears granulated. The nematocysts of the tentacles are 17 19 x 1.5 to almost 2 (i, their 

 spirocysts n 14 X i 1.5 (2) p. The nematocysts of the actinopharynx are partly 22 26 X 1.5 2 p, 

 partly 2936 x 2.5 ft. 



The siphonoglyphe is provided with longer cilia than the other part of the actinopharynx. 



The 8 " Edwardsia-mesenteries" are well-developed, the other 8 mesenteries in the uppermost part 

 of the column are also distinct. I have before described and reproduced the former (Carlgren 1893 PI. 2 

 figs. 5 8) from different parts of the body. 

 The longitudinal muscle-pennons are in trans- 

 verse-sections somewhat elongated and show, 

 at most, about 20, commonly 14 17 folds. 

 They are especially high in the outer and 

 also in the inner part and rather richly 

 ramificated; between these folds there are 

 shorter ones, simple or a little branched 

 (textfig. 28 transverse-section through the 

 upper part of the cnido-glandular tract). The 

 outer lamellar part of the mesenteries is at- 

 tached to the pennon rather close to the 

 outside. The parietal muscles of the same 

 tract show rather numerous folds, a little 

 branched and attached to thickish off-shoots of the mesogloea, the main lamella of the mesogloea is 

 likewise in the outer part thick (textfig. 29). The expansion of the parietal muscles on the column is 

 the ordinary one. 



Remarks. I have before (1893) described this species as a variety of E. clavata. A closer examina- 

 tion, particularly of the distribution of the nemathybomes, however, proves that it is well differentiated 

 from the species, called by myself E. clavata var. longicornis = E. longicornis, though they were both of them 

 dredged in the same locality (compare E. tuberculata, longicornis and danica). 



Fig. 28. 

 Textfigs. 28 29. Edwardsia pallida. Compare the text! 



Edwardsia danica n. sp. 



Dimensions. Physa well-developed. Scapus with a rather well-developed periderm. Nemathy- 

 bomes from somewhat small to small, scattered, but not closely packed together in groups. Nematocysts 

 of the nemathybomes partly 24 42 X (2.5) 3 3.5 (4) p, partly 46 72 X 4 5 //, the latter sometimes very 

 sparse (or absent?). Tentacles in varying numbers unto 20 of ordinary length. Nematocysts of the tentacles 

 17 19 X i 2 /t, their spirocysts 10 17 X I 2 //. Nematocysts of the actinopharynx partly 15 19 X 



