1142 A MONOGRAPH OF THE AUSTRALIAN SPONGES, 



of the outer surface. Three rays tangental and regular, curved 

 inward, fourth ray sagittal, pointing centrix^etally and much 

 shorter than the others. 



Locality : South West Coast of Australia, Freemantle, Carter. 



51. SPECIES. TEICHONELLA LABYRINTHICA. Carter (1.) 



Laminae smooth and wound round a central axis so as to form 

 a labyrinth of screw-shaped fans. Oscula on the concave side of 

 the whole lamina 0*07 mm. in diameter and 0-14 mm. apart. The 

 lamina has a thickness of about 2 mm., the whole Sponge 

 attaining a greatest diameter of 50 mm. The structure and 

 position of the spicules make it apparent, that the canal system 

 is Sycanoid. 



The anatomy of this Sponge is likewise totally unknown, so 

 that its name and position here are only preliminary. 



Spicules : The skeleton consists of triradiate and acerate 

 spicules. Triradiates sagittal, unpaired ray, straight 0*22 mm. 

 long. Paired rays much sh-^rter, curved, nearly at right angles 

 with the unpaired ray. The long ray situated longitudinally. 

 These spicules form a perfect tubar skeleton. Acerates straight 

 or bent obtusely pointed at the inner, and spear-shaped at the 

 outer end, measuring 0-13 mm. in length. These spicules are 

 disposed in tufts, they are twice as long on the Oscular side as 

 at the other. (To which does the measurement apply. 1) 



Locality : South west coast of Australia, Freemantle, Carter. 



22. GENUS. EILHARDIA. Polejaeff (2.) 



Teichonid^ of caliciform shape. The surface carrying pores 

 supported by triradiate and minute acerate spicules, that bearing 

 oscula propped by large acerate spicules. 



This genus is deservedly dedicated by Polejaeff to my teacher, 

 Franz Eilhard Schulze, the reformer of Spongiology. 



(1.) B. T. Carter. L.c, p. 37, pi. II., figs. 6-9. 

 (2.) N. PoUjaeff. L.c, p. 70. 



