100 G Canadian Arctic Expedition, 1913- 



Jmti 



One specimen (PI. XXII, fig. 7) had several very distinct cinclidae, and some 

 outer integument. It may be a very distinct species. No sections of it were 

 made. 



This species is very closely related to Actinauge, to which I formerly referred 

 it. The only notable distinctions seem to be the lack of tubercles below the 

 parapet and the thinness of the walls with a corresponding decrease in the thick- 

 ness of the sphincter muscle. The character of the capitular ridges, the swollen 

 bases of the tentacles, and the arrangement of the mesenteries are nearly the 

 same if specimens of equal age be compared. 



It has been suggested that it might be related to Korenia margaritce of 

 Danielssen, 1887, but that appears to be quite different, although it has the 

 same amplexicaul habit, as do many other unrelated species. Korenia has a 

 nearly smooth column with a few perforated papillae, probably raised cinclidae, 

 and with some similar papillae on the disk. The margin is crenulated and there 

 are no capitular folds. Its tentacles seem not to be retractile. It has 12 pairs 

 of perfect mesenteries. It probably belongs to the same subfamily. 



It may be nearer Actinia abyssicola Moseley. 



Our species has been taken on the fishing Banks off Nova Scotia many 

 times by the Gloucester, Mass., fishermen. It was dredged by the " Blake" 

 and by the " Albatross" at several stations in 168 to 245 fathoms, nearly always 

 attached to bare portions of the axis of living Balticina, sometimes singly, but 

 more often in clusters of three or more, united together by sutures and so large 

 and heavy that the Balticina bends over. The Challenger specimens of S. 

 abyssicola had the same habit and were from the same region. 



Hertwig included two species in his genus Stephanactis, viz.: first, S. tuber- 

 culata H.; and second, S. abyssicola Moseley, sp. He very fully described the 

 former externally and internally, but owing to the state of the two specimens 

 of the second he did not give much new information, but found that it agreed 

 in most structural characters with the former. But he noted the relative 

 smoothness of the capitulum and the presence of a few cinclidae. 



His S. tuberculata had strong capitular ridges or folds, some of them lobate, 

 and a verrucose parapet; the tentacles had swollen bases, and he found a few 

 papilliform cinclidae. It is, therefore, very like my S. nexilis in appearance 

 and structure. 



The generic name, Stephanactis 1 was, however, used by me many years 

 previously for a very different genus. Therefore, I proposed in 1899 to use 

 Stephanauge for the generic name, but I erred in thinking that S. abyssicola 

 was the same as nexilis, and figured the latter under the name, S. abyssicola. 

 The real abyssicola may be generically distinct, if the character of the parapet 

 and capitulum are to be considered important in this group. 



Stephanauge tuberculata (Hert. sp., op. cit., p. 87, pi. Ill, figs. 7-7b) was 

 taken in 345 fathoms, Lat, 35 11' N.; Long. 139 28' East; attached to dead 

 parts of the axis of a Virgularia. 



Raphactis Verrill. 



Raphactis VERRILL, Amer. Journ. Science, Vol. VII, p. 144, 1899. Type, 

 R nitida VERRILL. 



Stephanactis (pars) HERTWIG, op. cit., 1882, (non Verrill, 1869). 



My genus Raphactis (op. cit., 1899, p. 144) is much like Stephanauge exter- 

 nally and internally, except that no acontia were found, so that it was formerly 



1 Stephanactis Verrill, (Proc. Essex Inst., Vol. VI, p. 89 (38), 1869), was the name given to S. indica 

 Ver., of the family Discostomidse. It was from Caspar Strait. The type has 12 very muscular perfect 

 mesenteries. The sphincter muscle is endodermal, circumscribed, large, oval in section; column is without 

 verrucse or suckers noticeable in alcoholic specimens; cortex is strongly wrinkled in both directions. 



