BY R. VON LENDENFELD, PH.D. 1137 



0-02 — 0*03 mm. The corresponding rays of adjoining Triradiates 

 generally lie parallel. Here we find also a few very large 

 Acerates, which ars situated longitudinally and increase in 

 number the nearer we get towards the proboscis, they are 

 spindle-shaped, pointed at both ends, straight or curved with the 

 convex side turned outward. They measure 7 — 1"5 mm. x 04 

 — 0"05mm. The wall of the stomach and the larger exhalent 

 canals is coated with regular sagittal Quadriradiates, the 

 differentiated ray of which protrudes into the cavity. The 

 tangental rays are sagittally developed, the sagittal ray points 

 downwards and is 0*2 — 03 mm, long. (In the Gastral wall.) 

 In the Quadriradiates along the canals these rays are shorter 

 measuring 1 — O'lSmm. only in length, and much shorter than 

 the tangental rays, which appear strongly curved and embrace 

 the canals. The centripetal protruding ray of the Quadriradiate 

 is either straight or bent hook-like, and J-^ as long as the 

 tangental, lateral rays. The rays of the Quadriradiates are 

 0-008— 0-012 mm. thick. 



The proboscis consists of a thick wall supported by no less than 

 four different layers of spicules. (1st.) Outside a ring of very large 

 longitudinal Acerates 1 x 0-05 mm. (2nd.) A layer of sagittal 

 Triradiates the differentiated ray of which points downwards. 

 (2rd.) A layer of similarly disposed Quadriradiates. (4th.) An 

 interior layer of extremely slender Acerates measuring 0-6 — 09 x 

 0001 — 0-004 which are situated longitudinally and very closely 



Locality : Pacific Ocean, Viti Islands, Graeffe ; East Coast of 

 New Zealand, Von Lendenfeld. 



49. SPECIES. LEUCANDRA SACCHARATA, Haeckel (1). 

 LEUCANIA SACCHARATA. Ridley (2). 



This Sponge occurs in the shape of solitary persons and also in 

 colonial forms, with or without Oscula. The solitary form with 



(1.) E. Haeckel. L.c. Band II., Seite 228; Band III., Taf. 33, %s. 

 3a. 3e. Taf el 38, figs. 7-74. 



(2.) Stuart 0. Ridley. Report on the Sponge. Report on the Zoological 

 Collections made in the Indian and Pacific Oceans during the Voyage of 

 H.M.S. Alert, in 1881-1882. British Museum Catalogue for 1884, p. 482. 



