36 PENNATUUDA. 



i. e. the lateral ones, carry the sexual organs, but he says also that he has not been able to make a 

 thorough examination on this point. 



As to the construction of the zoo ids, most frequently I have been unable to see any ten- 

 tacle in any of the zooids of the stalk, except in those placed on the «sheath-formed dilations and on 

 the rhachis-club. When also many of the zooids in these latter regions want a tentacle, I take it to 

 have been lost; the other zooids of the stalk have, I think, also had such a tentacle. I cannot acknow- 

 ledge Danielssen's figure 56, I.e. PL X, to be correct; more especially, I must remark that the feature 

 given at e of <au oblong aperture in the slightly retracted tentacle (comp. the explanation of the 

 figures, 1. c. p. 82), is surely a misinterpretation; but several of the figured stages of retraction are 

 also hardly correct, at all events I have never been able to find them. The tentacles may often be 

 several times longer than the body of the zooid, and they may --as correctly stated by D. — have 

 two rows of piunulse, or one, or none at all. 



With regard to its distribution, Umbellula encrinus is limited to the Arctic Ocean and to the 

 deeper part of the Atlantic which has the character of the Arctic sea by being situated west of the 

 coast-banks of the Scandinavian peninsula and north of the submarine ridges connecting Greenland 

 with Iceland, Iceland with the Faeroes, and these latter with the Shetland Islands. Originally (1753) it 

 was taken in the Arctic Ocean at 79 N. Lat., 80 miles from the coast of «Greenland> 1 ) (Ellis's and 

 Mylius's specimens); then it was found again in 1873 by the Austro-Hungarian Expedition (Maren- 

 zeller: Denkschr. Ak. Wien 1878, p. 377) near 79 N. Eat, 62 29' E.Long, at a depth of 210 metres, east 

 of Franz-Joseph Land (the specimen, 630 mm long, was lost with the ship); later by the Vega Expedi- 

 tion in the Kara Sea (the «Vega»'s Station 54) at 130 fathoms (Stuxberg: Vega-Exp. vetensk. Arb. I, 

 1882, p. 692, and V, 1887, p. 163) ; by the Norwegian North-Atlantic Expedition at four different places 

 between 79° 59' N. Lat, 5 40' E. Long., west of Spitzbergen, and 62 44' N. Lat, i c 48' E. Long., between 

 Norway and the Faeroes, in depths from 412 — 498 fathoms (a dead axis was further found at a fifth 

 place at a depth of 536 fathoms) all within the territory of the tcold area . To these localities are to 

 be added those of the dngolf : St. 105, (1 specimen, Nr. 2) 65 34' N. Lat, 7 31' W. Long., 762 fathoms, 

 about midway between the Faeroe Islands and Jan Mayen, and St. 116, 70 5' N. Lat, 8° 26' W.Long., 

 371 fathoms, south of Jan Mayen. At the latter place the trawl of the < Ingolf « evidently passed over 

 a plantation of large specimens; one was caught by the crow-foot in front of the trawl, and was saved 

 entirely (Nr. 3) 2 ), of three the tops were cut off (Nrs. 5, 6, 7), and one was hanging on the outside of 

 the trawl-bag, but slipped into the sea again; at St. 126, 67 19' N. Lat, 15 52' W.Long., 293 fathoms, 

 north of Iceland, was further taken a dead piece of the calcareous axis, 26o mm long, of a large 

 specimen. Finally, Nathorst (Nat. Science, Nov. 1899, p. 319, and «Twa somrar etc*, 2, p. 93) has, in 

 1899, taken a large specimen, 2 metres, i2 ct,n long, close to Jan Mayen, and from the Danish East- 

 Greenland Expedition in the summer of 1900, Mag. Sc. Soren Jensen brought home three specimens 

 (Nrs. 1, 4, 8), a young stage from Cape Brewster, depth 250 fathoms, a large specimen and a torn off 



1 ) i. e. either East-Greenland or Spitzbergen (corup. Lindahl 1. c. p. 3). 



2 ) As there was, of course, no glass tube of such dimensions on board, one of our spare trawl-beams — an iron tube 

 15 feet long — was, b}- the excellent proposal of Captain Evers, used as a reservoir, filled with spirit and properly closed 

 at both ends. 



