66 



PENNATULIDA. 



Anthoptilum grandiflorum (Verr.). 



Virgularia grandiftora Verrill. Am. J. Sc. (3) Vol. 17, 1879, p. 239. 

 Anthoptilum t horns oni Kolliker. Challenger Rep. Penn. 1880, p. 13, PI. V, Figs. 16 18. 



grandifl.orum Verrill. Am. J. Sc. (3), Vol. 23, 1882, pp. 312, 315; Bull. Mus. Comp. Zool. 

 Vol. XI, p. 5, PL I, Fig. 6. 



The < Ingolf * has obtained six specimens at one station in the Davis Straits; three of these 

 are well-preserved, two rather large, the third small; two are more or less damaged, and one specimen 

 is quite denuded (Nr. 6); two specimens (Nr. 7, 8) have been taken at another station, both of them 

 in bad condition. 



As is generally the case in the species, spicules are only found in the end of the peduncle; 

 in one of the specimens the largest measure to 0.024 0.030""", whilst others show a size of ca. 0.012 

 o.o20 mm ; the smallest seem to be even smaller than the minimum size of 0.007""" given by Kolliker; 

 a regular combination of four spicules is rather common, but more irregular combinations of three or 

 four spicules are also found. 



The number of polyps increases during growth, not only in the lower, boundary part of 

 the rhachis, but also farther up in the older part, where the oblique rows here representing 

 the wings are often seen on the ventral side of the colony to be increased by a young polyp 

 or a bud. 



The colour of the polyps when living is violet, that of the stem reddish; in spirit this sea-pen 

 loses its colour only the tentacles of the polyps remain coloured, and there it is turned brown. In several 

 of the specimens from both stations peculiar, worm-like parasites were found, partly projecting from 

 the mouth of the polyps; they were parasitic Copepoda of the genus Lamippe Bruz. ; evidently a 

 distinct new species, to which I give the name of L. anthoptili. 



Anthoptilum grandiflorum has hitherto only been mentioned from the American side of the 

 Atlantic; from North America it has been known from off Guadaloupe to off Nova Scotia (42 46' N. La t. 

 63 45' W. Long.) (Verrill, Agassiz); from South America from 37 17' S. Lat, 53 12' W. Long., south of 

 Buenos Ayres (the Challenger ). To these localities two new ones are to be added, showing that the 

 species ranges over a far wider geographical territory, as well to the north as to the east, in the 

 Atlantic. The specimens of the Ingolf have been obtained in the Davis Straits, partly south-west 

 of Godthaab, at St. 25, 63 30' N. Lat, 54 25' W. Long., 582 fathoms (soft mud, somewhat like potter's 



') The greatest breadth of the naked calcareous axis on the compressed lateral surface 2" 1 " 1 , on the narrow sur- 

 face i.5 mln . 



