66 



PENNATULIDA. 



Anthoptilum grandiflorum (Verr.). 



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

 Anthoptilum thomsoni Kolliker. Challenger Rep. Penn. 1880, p. 13, PI. V, Figs. 16—18. 



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



Vol. XI, p. 5, PI. 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. 



Nr. 



Total length in mni- 



Length of peduncle » 



Diameter of the upper enlargement of the peduncle . ;> 



Breadth of the naked dorsal surface of the rhachis 



Number of polyps in the wings 



Ivength of an extended polyp with the tentacles in mm. 



415 



52 



8 



c. 4 



5-7 

 16 



I 



300 



41 

 5-5 

 4 

 5-7 



205 



32 



3 



3 



3—5 



172 



122 



23 



2 



1—2 



2—3 



5 



1801) 



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 

 —0.020"""; 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, j^artly 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. 



Aiithoptibofu grinidiflorum 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. Lat. 



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 breadtli of the naked calcareous axis on the compressed lateral surface 2'nm, on the narrow sur- 

 face 1.5""". 



