r . PORII-ERA. II. 



54 



from it especially by the facts that the branches are polyserial and the spined tylostyli of the coating 

 layer more pointed, and these two characters are constant and are found together in all the material 

 I have examined. It will also have been seen from the description that the skeleton of the axis is 

 constructed in a somewhat different way. After Carter's descriptions and figures I regard the iden- 

 tification as certain, as both the spicula-figures, especially that of the large chela, agree very well, and 

 also the figure of the exterior of the small fragment Carter had show that the question is of a 

 species with branches arranged polyserially. Of Armauer Hansen's figures of exteriors those on 

 PI. VII, figs. 2, 3, and 15 might perhaps be bihamatifera, but as it is said in the text that only one of 

 all the specimens had sigmata, the question is more likely of the species lycopodium. The question 

 cannot be decided with certainty, as the fact that sigmata of two different specimens are figured, both 

 on PI. Ill, fig. 5, and PL IV, fig. 2, shows that the quoted statement is wrong, and I have also examined 

 two specimens, which were both of them pennatula and consequently both provided with sigmata. 



Locality: Station 15, 66° 18' Lat. N., 25 59' Long. W., depth 330 fathoms (bottom temperature 

 -f-o c 75C); station 59, 65 00' Lat. N., n c 16' Long. W., depth 310 fathoms (bottom temperature -ho°iC); 

 station 126, 67° 19' Lat. N., 15 52' Long. W., depth 293 fathoms (bottom temperature -=-o°5G); station 

 138, 63 26' Lat N., 7 56' Long. W., depth 471 fathoms (bottom temperature ^-o°6C); altogether eight 

 specimens. The stations are situated in the Denmark Strait, north and East of Iceland, and north of 

 the Faroe-Islands, and they are seen all to belong to the cold area with negative bottom temperature. 

 It is of interest to see that this species, which is so closely allied to the preceding one, from which 

 it differs only by slight, but constant characters, occurs exclusively in localities with negative bottom 

 temperature. 



Gcogr. distr. With regard to the specimens of the present species from the Norwegian North- 

 Atlantic Expedition the more particular localities are not known; if the species are represented in the 

 material, it must be supposed to have been taken on one of the stations in the cold area. The locality 

 is also wanting for the specimens of Carter, but on account of other sponges in the same jar 

 he thinks that the locality may possibly be in the western entrance of the British Channel. This is 

 probably not the case, however, as the species is a native of colder bottom, and I suppose that 

 Carter's specimens originate from one of the cold stations of the sPorcupine:. 



3. A. furcata u. sp. 



PL II, Figs. 9—10. PL XI, Fig. 3 a — h. 



The axis slender, diclwtomously branched once or several times. The lateral branches very short, 

 placed all round, only on the upper ramifications. The axial skeleton divided into fibre-like parts, out- 

 most a thick layer of spicules. Spicula: Megasclcra styli in the axis o-jp—o-6f'"", subtylostyli in the 

 branches and outmost in the axis, 0-268— o-j 6""", curved, finely spinulous tylosfrongyla in the coating of 

 the stalk 0-068 — o-og $'"'"; inicrosclcra of three forms, anisochela- palmata of tzvo forms, the characteristic 

 ones o-o/o— 0-0/4""". t,lc large ones with unsplit or split lower tooth 0-044 — 0-054""" '. sigmata o-o/j—o-o/?""". 



This species is of a very slender form; it begins below with a stalk that gradually branches 

 dichotomously. The most ramified specimen branches three times, so that the two branches formed 



