PENNATULIDA. j^- 



in their opinion, justifies the establishement of the new genus, which is placed between Halipteris and 

 Funiculina. From a cursory examination of the large specimens of Halipteris of a meter or more, 

 the resemblance, to be sure, is not very conspicuous; in most polyps of large specimens the edge 

 of the calyx seems often but little formed, as for instance is shown in the figure of Kolliker 

 (Monogr. PI. XVII, 146 — 147). A closer examination, however, of any tolerably well-preserved specimen 

 will always show a larger or smaller number of polyps, especially among the younger ones, for 

 instance in the lower end of the rhachis, in which the two calyx-teeth so conspicuous in Lygomorpha 

 are quite distinctly seen, and even rather long; and when once seen they may be traced in almost all 

 the polyp-calyxes. In the figures of Koren and Danielssen of the adult Halipteris in Fauna litt. 

 Norveg. a"* part, PI. XII (figs. 7 — 10) they are also given very distinctl)-, and in the text it is said that 

 the calyces are of a «conical form and end upward in two points». Kolliker says (Monogr. p. 244): 

 «Mundung ganzrandig mit einem kurzen Zahn luid einer demselben entsprechenden schwachen Leiste 

 an der unteren ventralen Seite, und swacher Andeutung eines ahnlichen Vorsprunges am gegeniiber- 

 liegenden Rande». Of the two ventral teeth also, the one which the polyp turns toward the naked 

 dorsal surface of the rhachis is generally the most developed. It is evidently this tooth that Grieg 

 has remarked upon in his description of tiPrntoptilniJi tortmir, whilst he has overlooked the other. 

 All other features, in which Lygoiiiorp/ia Sarsii might seem to deviate from Halipteris christii^ are onl\- 

 such as are a consequence of its being a }oung stage : the arrangement and smaller number of the 

 polyps, the small size of the colony etc. 



Next we come to some (3) specimens of lengths from 234 — 310"""'); they were labelled 'Stich- 

 optilum arcticunn> Grieg. Vadso. 30—40 fathoms. G. O. Sars -. Grieg has described them in Bergens 

 Mus. Aarb. 1886, p. 15 and p. 21, and given figures 1. c. PI. VIII and IX; of the calyx he says p. 16: 

 «The edge is provided with eight small, little prominent spines. The sj^icules are numerous in the cell, 

 being especially found in large numbers in one side of the spines, whilst the other side is without 

 spicules (PL IX, fig. 6). The spicules never project over the edge, they are mostly placed longitudin- 

 ally, and are narrow, pointed, 0.210""" long . I must suppose that the statement here .should be an 

 the spines of one (the ventral) sides; and the fig. 6 quoted above shows the two ventral calyx-teeth 

 which I find in the polyjjs of all these specimens; as in the grown specimens, one of the calyx-teeth is 

 even the stronger one in most individuals. What has given Grieg the notion of the other six teeth 

 is only slight undulations ot the edge of the cahx; they ma>- also often be seen in large Halipteris, 

 and I take them to be the last traces of the equipment that must be said to be typical of the Penna- 

 tulids. Also with regard to the arrangement and number of pohps, these i-Stichoptihim.., in accordance 

 with their greater size, are nearer to the «i/«/?/i/'cm>-character than is i.Lygomorphai. For the rest, 

 Grieg has himself later observed the resemblance with the latter; m Ovs. Norg. Penn. (Berg. Mus. 

 Aarb. 1891) p. 22 he says: «cWhen I enumerate these two species (\-\z. Protoptilum tortum and Sticliop- 

 tilum articum\ it is not without some hesitation; they ought perhaps, to be enumerated as varieties 

 of Lygomorpha Sarsii, whicli they resemble very closelys. (The succeeding observations on the varia- 



») Between these and the preceediug, the above mentioned type-specimen of Pyotopiiliim torlum. I43n'n> Iodk. a"'! 

 the tLygomorp/ia »-ir3.^ment. 136mm long, from Knstianssund. fit in with regard to development and size. 



