102 



PORIFERA. II 



The Cladorhiza-species described at present are the following ones: 



1872. C. abyssicola O. Sars. 



1876. - corticocancellata Cart, (as a variety of abyssicola). 



1887. - abyssicola var. rectangularis R. and D. The Pacific. 



1887. - - linearis R. and D. The southern Pacific. 



1887. - moniliformis R. and D. Southwest of Australia. 



1887. - longipinna R. and D. The northern Pacific. 



1887. - similis R. and D. The southern Pacific. 



1887. - tridentata R. and D. Between Prince Edward Island and Crozet Island. 



1887. - pentacrinus Dendy. Northeast of New Zealand. 



1902. - flos abyssi Tops. Off the Cape Verde Islands. 



- gelida mihi. 



- tenuisigma mihi. 



- iniquidentata mihi. 



- oxeata mihi. 



The two varieties rectangular is and linearis established by Ridley and Dendy are surely 

 independent species. 



In Zool. Anzeig. XIX. 532, Kieschnick has established a species C. depressa. As it is from a 

 littoral locality it is scarcely a Cladorhiza, and as Thiele, in his account of Kieschnick's species 

 (Abhandl. Senckenberg. Nat. Gesell. XXV, 1903) has been unable to find anything whatever that might 

 correspond to it, the species must be regarded as non-existing. 



With regard to the Asbcslopluma-speties described under the generic name of Cladorhiza see 

 under the genus Asbcstopluma. 



Chondrocladia Wyv. Thomson. 



Erect, branched in different ways; often a central axis wit// lateral brandies which may be 

 papillose, or the branches gathered at the top ; sometimes branched like a tree, or finally of a more 

 irregular form. The skeleton is in close accordance with the form, and consists in the axis or axes of 

 poivcrful spicnla-fibrcs, and of similar, but thinner ones in the branches. Spongin is found in the fibres. 

 Spicula: Megasclera styli, and sometimes finely spinulous styli in a special layer coating the stalk: 

 microsclera: the characteristic viicrosclcra are isancora 1 unguiferce of one, two. or three sizes with from 

 three to nine teeth at either end. to which forms sigmata are (always) joined. 



1. C. gigantea Arm. Hans. 

 PI. IV, Fig. 1. PI. XIII, Fig. 2 a— 1. 



1880? Cladorhiza graudis Verrill, Proceed, of the U. S. Nat. Mus. II, 1879, 2 °4- 



1885. Dcs?nacidon clavatum Armauer Hansen, The Norwegian North-Atlantic Exp. XIII, Spongiadae, 

 14, PI. II, fig. n. 



