PENNATUIvIDA. 



17 



Verrill, a. o.) of this species whicli can scarce!}' be confounded witli an>- otlier. 1 sliall only make a 

 few observations on the spicules, as these have not been described in particular by the earlier authors. 

 The spicules are of a marked triangular t\pe ; in the larger types especially the polyp-spicules 

 (i. e. of the calices, the upper part with the tentacles containing no spicules) the three ridges 

 which constitute the spicule show their free edges to be distincth' thickened, whilst the sides 

 are hollowed; in the red spicules, therefore, the colour is deeper at these thick edges. The polyp- 

 spicules measure 0.144 — 0.897'"'" long, and 0.016 — 0.048""" broad. The colourless part of the peduncle 

 is provided with short, coarse spicules 0.088 — 0.120""'" long, the thickest ones being 0.024'""' thick; these 

 spicules are of a very .slight reddish colour; the deep-red spiciiles from the band-shaped edge of the 

 bulb are 0.096—0.200'"™ long, and 0.016—0.032""" broad. 



The specimens in hand from the Faeroe Isles show the following particular features: 



The specimens Nr. 18 and 19 are defective; in Nr. 18 the lowermost wings are wanting, the tissues 

 of the bulb and the peduncle having been rubbed away; Nr. 19 is broken off below the bulb; the rhachis, 

 which is complete, is ca. 70™"" long. Nr. 20 is the smallest specimen of this species I have ever seen amongst 

 the large number I have had the opportunity- to examine in our Museum and in Bergen and Christiania; 

 Verrill mentions that he has had several young specimens and one very young, but he gives no 

 measurements nor any further information. For the sake of comparison, I may just mention that the two 

 specimens of M. Sars, upon which the species P. borealis was established, were of a respective length 

 of 420 (16") and ca. 810'"'" (31"), with 37 and 57 pairs of wings; in other Norwegian specimens measured 

 by Koren and Danielssen, the length is given as 250—780"'"' with 30—70 pairs of wings and 48—100 

 polyps, whilst Verrill mentions a specimen of 530'""^ in length with 36 pairs of wings, as one of the 

 largest American specimens. 



The colour in some specimens is brownish or dark brownish-red (cspeciaUy so in Nr. 20, partly 

 in Nr. 18 and 19), but most frequently of a beautiful red or reddish yellow. 



Occurrence. The species was only known hitherto from the fjords and coast-regions of 

 Norway, the eastern coast of North America where it is common on the fishing banks off New 



The Ingolf-Expedition. V i, 3 



