2 Proceedings of ike Royal Society of Victoria. 



Tubar skeleton articulate or inarticulate, cortical skeleton 

 formed chiefly of huge oxeote spicules arranged in several 

 layers and lying parallel to the long axes of the Sycon 

 individuals." 



For the single species at present known I propose the 

 name Syrtute ijulchella. 



Synute pulchella (n. sp.) 

 General Airpearance and Canal System. 



The colony (of which a single specimen only has as yet been 

 obtained) reseml^les in general form a small s[)ecimen of Mr. 

 Carter's Teichonella prolifera.* It consists of a number of 

 stout vertical walls, nearly a quarter of an inch in thickness, 

 which branch or divide in such a way that the upper sur- 

 face of the sponge presents a characteristic mseandriniform 

 appearance. Along the mgeandering ridge which forms the 

 upper surface of the sponge small oscula are arranged, nearly 

 always in a single row. These oscula are less than ] nun. 

 in diameter and they have no oscular fringe, neither are they 

 raised on papillae, for the fusion of the Sycon individuals 

 (one of which corresponds, of course, to each osculumj is 

 complete up to the vejy top. The sides of the walls 

 exhibit a beautifully striated appearance, due to the large 

 oxeote spicules of the cortex, which can be distinguished 

 with the naked eye, although they do not project beyond 

 the surface. The entire colony is somewhat constricted 

 towards the base, so that the fused individuals composing 

 it tend to radiate outwards and upwards from a common 

 centre. The whole colony is about 38 mm. in greatest 

 width and IS mm. in height. It is attached to the surface 

 of another, much larger, non-calcareous sponge, and in spii-it 

 is of a pale grey colour, nearly white. 



The canal system, apart from the fusion of the Sycon 

 individuals, closely resembles that of Ute argentea as 

 figured by Polt^jaeff'.-f- A horizontal section of the colony 



* Fignied in my paper "On the Anatomy of Grantia lahxjrintMcti 

 Carter, and the so-called Family Teichonidje." Quarterly Journal of 

 Microscopical Science, January 1891. Plate I, Fig. 6. 



t Challenger Calcarea. Plate IV, Fig. 3. 



