PORIFERA. II. 201 



Gcogr. distr. The Shetland Islands (Bowerbank), between Scotland and the Faroe Islands, 

 depth 363 fathoms (the « Porcupine ). Thus the species is only known from a rather limited territory. 

 Strange to tell, the bottom temperature of the locality at which the Porcupine has obtained the 

 species is given to -=- o°3 C, while the species is otherwise only known from localities with positive 

 bottom temperatures. 



Remarks: As I have examined a specimen sent by the Rev. Mr. Norman, the identification 

 of this species, which is otherwise a very characteristic one, is sure. Norman's specimen shows no 

 sigmata, neither were such found by Carter in his specimen. It is an obvious conclusion that the 

 bodies which Bowerbank has supposed to be sigmata, have been developmental forms of the 

 small chela. 



2. F. fabricans O. Schmidt. 

 PI. XIX, Fig. 3 a -g. 



1874. Esperia fabricans O.Schmidt, Die zweite deutsche Nordpolarfahrt, II, 2, 433. 



1885. Forcipina bulbosa Vosmaer (Syuon. except.), Bijdrag tot de Dierk., i2te Afl., 3die Gedeelt, 26, 



PI. I, fig. n, PI. V, figs r 60—68. 

 1903. Hamigera (Forcipina) fabricans Thiele, Arch, fiir Naturgesch., 1903, I, 385, Taf. XXI, Fig. 15 a— e. 



Massive, sometimes somewhat erect. The surface slightly shaggy. The dermal membrane a thin 

 film , supported by projecting bundles of dermal spicules. The upper surface of the sponge set with 

 fapilUe. in the points of which oscula open. The skeleton a rather irregular uetzuork with irregular, 

 loose, polyspicular primary fibres and transverse spicules placed singly. Spicula: Mcgasclcra: the skeletal 

 spicules styli o-jj—o-f/y'"". the dermal spicules fylofa o-ji — oyj""".- microsclera of four forms, isochelm 

 arcualie 1x042 — o-ojp"'", forcipes of two sizes, large ones 0-060 — o-ojj""", small ones 0-025— 0-034""", sl §- 

 mata quite or almost quite plane 0-12 — 0-14""". 



Vosmaer's figure of the exterior of this species, which is evidently drawn from a damaged 

 specimen, shows an about massive sponge with papillae on the surface, and the specimens before me 

 have a similar appearance. None of the specimens in hand are entire. One is attached to a stone, 

 another to a Bryozoon. To judge from the material, the species has a massive, sometimes, perhaps, a 

 little erect form. The surface, chiefly in the upper part of the sponge, is set more or less closely with 

 papillse, which may vary somewhat in size. The largest specimen before me is about 6o mra high, and 

 Vosmaer's specimen was of a similar size. The consistency is rather loose, but somewhat elastic; 

 some specimens seem to be more brittle, others more elastic, which is, perhaps, dependent on the 

 degree of contraction. The colour (in spirit) is grayish white or yellowish white. The surface is dis- 

 persedl)- and rather slightly shaggy. The dermal membrane is a thin and transparent film, supported 

 by projecting bundles of dermal spicules. Pores and oscula: Unfortunately, the surface and the dermal 

 membrane are highly damaged in the specimens in hand, and consequently some uncertainty is left 

 with regard to the pores and oscula. On the upper part of the sponge some papillse are found; in 

 one specimen they are scattered and small, not above 1-5™'" high, and closely shut in the point; in 

 another specimen they are close-set and larger, and also somewhat irregular; in this latter specimen 



The Ingolf-Expedition. VI. -'. 26 



