Porifera. 



III. 



By 



William Lundbeck. 



(Fam. III. Desmacidonidae.) 



(Subfam. i. Mycalinae) 



(Group 2. Myxilleae.) 



Tedania Gray. 



Of various 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 inultt- 

 spic?/lar, 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 spicules, sometimes also spicules lying horizontally in the dermis ; it is sometimes strongly devel- 

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

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

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

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

 spinulous, in dragmata or scattered. 



i. T. suctoria O. Schmidt. 



PI. I, Figs. 1 — 5, PL IV, Fig. 1. 



1870. Tedania suctoria O. Schmidt, Grundziige einer Spongienf. des atlant. Gebiet. 43, Tab. V, Fig. 11. 



1875. Tedania increseens 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. 83—88. 

 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 increseens. Thiele, Arch, fur Xaturgesch. 1903, I, 380. Taf. XXI, Fig. 9. 



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



1909. — — , Lundbeck, Meddel. om Gronland, XXIX, 443. 



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

 richly beset with papilhr and diffusely hispid. The dermal membrane somewhat solid, its skeleton -weakly 

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



The Ingolt-Expedition. VI. 3. J 



