204 



PORIFERA. II. 



Tliiele has not seen the small forcipes or has paid no attention to them. With regard to Thiele's 

 referring of the species to Hamigera see p. 211. Also Vosmaer's description and figures, as well of 

 the exterior as of the spicules, agree in all details with my specimens. The spicule figured by Vos- 

 maer fig. 66 is a developmental form of a forceps; he has overlooked the small forcipes. The species 

 cited by Vosmaer under the synonymy, do not belong here, F. forcipis being a quite distinct species, 

 which holds good also of F. bulbosa Cart. The F.bulbosa mentioned by Topsent (Resultats des Camp, 

 scient. du Prince de Monaco, Fasc. XXV, 179, PI. I, fig. 13) is not Carter's species, but a new, inde- 

 pendent one, and when Topsent mentions Vosmaer's species under it, it is a mistake, as it is not 

 identical with this species either, but differs as well by its spiculation as by the want of the papillae 

 characteristic of F. fabrieans (= bulbosa Vosm.). The present species is a native of the cold bottom, 

 while as well Carter's species as that of Topsent are natives of the warm bottom, respectively 

 from Cape S. Vincent and the Azores. For further particulars see under the account of the species of 

 the genus p. 210. 



Locality: 62° 30' Lat. N. , i° 56' Long. E. , depth 275 fathoms (bottom temperature -4- cri2 C) 

 (Ad. Jensen, the cruise of the Michael Sars» 1902); East-Greenland, Forsblad's Fjord, depth 50 — 96 

 fathoms (the Amdrup-Expedition); East-Greenland, without any more particular statement (the East- 

 Greenland Expedition 1891 — 92). 



Geogr. distr. The species has been taken before at East-Greenland, North Shannon (zweite 

 deutsche Nordpolarfahrt, Thiele 1. c), and by the Willem Barent-Expedition off North Cape, 72 36' 

 Lat. N., 24 75' Long. E., depth 140 fathoms. To judge from the localities it is probable that the species 

 is a native of the cold bottom. 



3. F. Topsentii n. sp. 

 PL VII, Fig. 3. PI. XIX, Fig. 4 a— g. 



Massive, cushion-shaped. Tlic surface set with conical papilla;, and slightly shaggy. The dermal 

 membrane a thin film with horizontal dermal spicules and here and there erect bundles. Oscula open 

 into the papiller of the surface. The skeleton an irregular reticulation, partly polyspicular, partly itni- 

 spicular. Spicula : Alcgasclera : the skeletal spicules styli 0-62 — 0-74""". the dermal spicules strongyla to 

 tylota 0-357 — 0-45"""; microsclcra of four forms, isochelce arcuatce 0-034 — 0-047""", forcipes of two sizes, 

 large ones 0-086—0-104""", small ones 0-022 — 0-033""". sigmata. plane or almost plane, 0-12 — 0-14""". 



Of this species we have one large specimen and some quite small ones. The species is formed 

 like a cushion. The large specimen is torn off from its substratum, which, to judge from the form of 

 the surface of attachment, may have been a shell; the small specimens are attached to bottom material 

 of various kinds, foraminifera, gravel, etc. The sponge is set with rather close-standing, conical, pointed 

 papillae of an average length of ca. 4 mm . The papillae are numerous in the large specimen, while in 

 the small ones only some few papillse are found. The largest specimen is somewhat longish, it has a 

 length of 6o mm , a greatest breadth of ca. 45™'", and a height of fully 2o mm . The small specimens are 

 evidently quite young ones, they are 5 — 6 :nm long. The consistency is only little elastic, on the con- 

 trary, it is rather hard, almost cartilaginous. The colour (in spirit) of the surface is brown, the 



