Porifera. 



III. 



By 



William Lundbeck. 



(Fam. III. Desmacidonidse.) 



(Subfam. i. Mycalinse.) 



(Group 2. Myxilleae.) 

 Tedania Gray. 



Of varioiis shape, incrusting, massive, erect and leaf- or cup-shaped, or cylindrical, or finally 

 more or less digitate and branched. The skeleton a more or less diffuse reticulation, generally multi- 

 spicular, more rarely partly or quite unispicular. Spongin generally (or always) present, as a rule to 

 a slight degree, sometimes more richly. The dermal skeleton as a rule formed of erect bundles of 

 dermal spiciiles, sometimes also spictiles lying horizontally in the dermis ; it is sometimes strongly devel- 

 oped, sometimes weaker, with relatively few spicules. Oscula scattered, sometimes on the apex of tubes 

 or papilla; pores scattered or on the apex of papilla or otherwise definitely localized. Spicula: mega- 

 sclera: the skeletal spicules are smooth styli, the dermal spicules diac final, tylota, tornota or strongyla, 

 sometimes with slightly spined ends ; microsclera only one form, rhaphides with unequal ends, finely 

 spinulous, in dragmata or scattered. 



i. T. suctoria O. Schmidt 

 PI. I, Figs. 1-5, PI. IV, Fig. i. 



1870. Tedania suctoria O. Schmidt, Grundziige einer Spongienf. des atlant. Gebiet. 43, Tab. V, Fig. n. 

 1875. Tedania incresce.ns O. Schmidt, Jahresb. d. Comm. zur wiss. Unters. deutsch. Meere in Kiel fur 



1872-73, 115. 



1882. Tedania suctoria, Vosmaer, Niederl. Arch. f. Zool. Suppl. Band I, 42, PI. I, fig. 24, PI. Ill, figs. 8388. 

 1885. , Vosmaer, Bijdr. tot. de Dierk. i2 te Afl. 3 die Gedeelt. 22. 



1892. Tedania conuligera Topsent, Resultats des camp. sc. du Prince de Monaco, Fasc. II, 79, PI. I, fig. 16. 



1903. Tedania increscens, Thiele, Arch, fur Naturgesch. 1903, I, 380. Taf. XXI, Fig. 9. 



1904. Tedania suctoria, Topsent, 1. c. Fasc. XXV, 176. 



1909. , Lundbeck, Meddel. oni Gronland, XXIX, 443. 



fncrttsting, massive, or more erect and sometimes somewhat branched. Surface more or less 

 nclily beset with papilla: and diffusely hispid. The dermal membrane somewhat solid, ifs skeleton weakly 

 developed, consisting of bundles of dermal spicules, partly erect, partly more horizontal; also scattered 



The Ingolf-F.xpedition. VI. 3. J 



