PORIFERA. II. 91 



branchlets. With regard to the spiculation sure distinguishing characters are found in the sigmata, 

 especially in the presence of the fine, contort sigma, and in the size of the ancorse. Among the figures 

 of the exterior, given in the Norwegian North-Atlantic Expedition, those quoted above may with great 

 probability be referred here, especially on account of the distinctly figured end-knobs. Of the figures 

 of spicula, fig. 6 on PL IV may with some probability be referred to the present species. Among the 

 Cladorhi:a-iovms taken by the « Porcupine -Expedition, I suppose that the « peculiar form in jar 65 

 mentioned by Carter (Ann. Mag. Nat. Hist. Ser. 4, XVIII, 320) belongs here; according to the descrip- 

 tion it might very well be a specimen with small or wanting branchlets. 



Locality: Ingolf station 105, 65° 34' Lat. N, f 31' Long.W., depth 762 fathoms (bottom temperature 

 -r-o°8C); station 117, 69 13' Lat. N., 8° 23' Long. W., depth 1003 fathoms (bottom temperature -4- i c o C), 

 seven more or less damaged specimens in all. Station 105 is situated to the east of Iceland, and 

 station 117 south of Jan Mayen. 



Gcogr. distr. The species is hitherto with certainty only known from the Norwegian Sea, 

 where, besides by the « Ingolf , it has been taken by the Norwegian North-Atlantic Expedition. If the 

 form mentioned by Carter I.e. belongs here, it has also been taken in the Faroe-Channel at a depth 

 of 345 fathoms with a bottom temperature of -4- i°i C. Accordingly, the species is, at all events, a 

 native of the cold bottom. 



4. C. iniquidentata n. sp. 



PL III, Fig. 6. PL XII, Fig. 5 a— e. 

 Slender, with branches issuing from a central axis ; the branches rather long, not arranged in 

 one plan, swollen in the ends in a somewhat club-shaped way. The skeleton of the generic type. Spicula: 

 Megasclera styli o-jo — o-68"""; microsclcra of only one form, auisaneora 1 nnguifcrcc with six to nine teeth 

 in the larger end, five teeth in the smaller end. 0-022 — 0-024""". 



In the exterior this species is very similar to C. abyssicola. We have only one specimen con- 

 sisting of a slender stem carrying a number of thin lateral branches issuing irregularly with different 

 intervals. The specimen is broken as well above as below, so that nothing can be said of its mode 

 of attachment. The stem and branches carry in the common way close-set branchlets issuing all 

 round. These branchlets are a little directed upward, but in contradistinction to those of the preceding 

 species they are quite straight. They are thickest at the base and become quite thin outward. A 

 distinct circular arrangement was not to be observed; but they are to some degree arranged in groups, 

 and this arrangement gets more marked by the fact that the branchlets are often coalesced at the 

 base, so that irregular circular thickenings are found, from which the branchlets issue. Towards the 

 point of the lateral branches the branchlets become shorter, and the points of the branches are slightly 

 swollen in a club-shaped way. The specimen in its damaged stage has a height of 50 mm , the only 

 entire lateral branch measures 27 mm , and the branchlets, which may be of somewhat different lengths, 

 are at most 3-5 mm long. The stem is fully i ,nm thick, the lateral branches are a little thinner. The 

 colour (in spirit) is whitish, somewhat transparent. The sponge is rather stiff, and the branchlets 

 scarcely so flexible as in the preceding species. The surface is smooth, spicules are only projecting 

 in the points of the branchlets. A thin dermal membrane ma}' be observed. Pores are seen in the 



12* 



