Si/nopsis of the ALudfallan Calcarea HeterocmUi. 115 



Localities. — Torres Strjiits (von Lendenfeld. Recorded by 

 Polejaeff f roui the Phillipine Islnuds and the Bermudas). 



73. Lev,cill(i imperfecta, Polejaeft', sp. 



Leueetta irtvpevfecta, Polejaeft'. Report on tlie Calcarea of 

 the Challenger Expedition, p. 67. 



Vosriiaeria imperfecta, von Lendenfeld. Proceedings of 

 the Linnean Society of New South Wales, Vol. IX, p. 11 13. 



Localitii.—O^^ Port Jackson (Polejaeft). 



7-t. Leucilla audraliensis, Carter, s[). 



Leuconia johnstonii, var aiistraliensis, Carter. Annals 

 and Magazine of Natural History, August 1886, p. 133. 



This beautiful little species nearly always presents itself 

 under the form of a small, ov(Md, sessile, solitary person, with 

 single, circular, naked, terminal osculum. The sponge-wall 

 is comparatively thick, and the dermal surface smootii and 

 iiard owing to the large quadriradiates. One very large 

 specimen in the collection, hoAvever, is conical in shape, and 

 has a very irregular surface, but this is very exceptional. 

 The species is sometimes social, and rarely consists of two 

 or more individuals united together, or of a single branched 

 individual ; but the small egg-like form is highly character- 

 istic. There are numerous specimens in the collection. 



The ftagellated chambers, thickly scattered through the 

 thickness of the wall, are usually approximately spherical, 

 and about O'l mm. in diameter ; immediately l^eneath the 

 dermal cortex, however, they are commonly rather lai'ger 

 and more or less sac-shaped. 



Locality. — Near Port Phillip Heads (Carter, and Stations 

 1, 5, 6, 9, coll. J. B. Wilson, and oft" Geelong, coll. H. 

 Grayson). 



75. Leucilla prolifera. Carter, sp. 



Telchouella prolifera, Carter. Annals and Magazine of 

 Natural History, July 1878, p. 85, and August 1886, p. 146. 



This beautiful sjjecies is represented in the collection by a 

 number of hue examples, one of which I have already ftgured 

 in n)y paper " On the Anatomy of Gixtntia labyriiifhica, 

 Carter, and the so-called Family Teichonidse " {Quarterly 

 Journal of Microscopical Science, Vol. 32, N.S.) The 

 ftagellated chambers are approximately spherical and about 

 0-09 mm. in diameter, thickly scattered through the sub- 

 stance of the sponge. With the exception of the small 

 quadrii-adiates in the walls of the oscular tubes, and the very 



I 2 



