PORIFERA. III. 25 



mainly to the cold area, as the localities, as soon as they are deeper than 300 fathoms, show a negative 

 temperature, but it may also go higher up and here occur in water with a positive temperature. 



Remarks about the species of the genera Histoderma, Histodermella, Inflatella 



and Cornnlum: 

 Of species which belong here, or have been supposed to belong here, there are at present 

 described the following: 



1874. Histoderma appciidiatlahnii Cart, (cited above). . Tylota to strongyla — chelae arcuatae — sigmata. 



1875. Desmacidoii physa O.Schmidt (cited above) Strongyla cheke arcuatae -- trichodragmata. 



1875. Inflatella pellicula O.Schmidt (cited above).... Strongyla. 



1876. HalicJiondria phlyctenodes Cart (Ann. Mag. Nat. 



Hist.4,XVIII,3i4, Pl.XIII,fig.i7, Pl.XV,fig-35) Tornota -- cheke arcuatae -- sigmata. 



1876. Connilum textile Cart, (cited above) Strongyla with spinnlons ends — chelae pal- 



matae — toxa. 

 1883. Phloeodictyon singaporeiise Cart. (Ann. Mag. Nat. 



Hist. 5, XII, 326, PI. XIII, fig. 17 a— b) Oxea -- short strongyla -- chelae palmatae. 



1885. Sideroderma navicelligerum Ridley and Dendy, 



(Challeng. Rep. XX, Monaxonida, 115, PI. VIII, 



fig. 9, PI. IX, figs. 5, 8—9) Tylota — small peculiar cheke — sigmata of 



two sizes — trichodragmata. 



1886. Histioderma verrucosum Cart. (Ann. Mag. Nat. 



Hist. 5, XVIII, 452) Tylostrongyla — chelae arcuatae — sigmata. 



1886. Histioderma polymasteides Cart. (Ann. Mag. Nat. 



Hist. 5, XVIII, 453) Tylota to tylotornota — chelae arcuatae? 



1886. Pseudohalic/iondria clavilobata Cart. (Ann. Mag. 



Nat. Hist. 5, XVIII, 454) Tylotornota — chelae arcnatae, enrious, spined. 



1887. Cornnlum asci&ioides Frstdt. (cited above) = Histoderma physa. 



1887. Connilum euteromorphoides Frstdt. (Vega Exp. 



vetensk. Jakttag. 447, PI. 25, figs. 3—6, PL 29, 



fig. 22) se below. 



1888. Sideroderma Zittrli Lendenf. (The Austral. Mns. 



Descrip. Catal. of Sponges, 211) Styli — oxea -- chelae -- rhaphides. 



1892. foycuxia viridis Tops, (cited above) Strongyla. 



1903. Histoderma natalense Kirkpatrick, (Marine 



Invertebr. in South Africa, III, 250, PI. V, 



fig. 17, PI. VI, figs. 18 a— e) Tylota — acanthoxea -- chelae arcuatae - - sig- 

 mata — trichodragmata — curious spined 

 bodies (transformed chelae? or forcipes?). 



1904. Joyeuxia tubulosa Tops. (Resultats des camp. sc. 



du Prince de Monaco, Fasc, XXV, 206, PI. V, 



fig. 5, PI. XIV, fig. 16) Strongyla. 



The fagolf-Expedition. VI. 3. •» 



