BY R. VON LENDENFELD, PH.D. 1103 



11. GENUS. AMPHORISCUS. Von Lendenfeld. 



The radial rays of the dermal quadriradiate spicules and the 

 centrifugal rays of the Gastral spicules are joined, or the former 

 penetrate the whole thickness of the body wall. 



This genus is nearly identical with Polejaeff's Amphoriscus, 

 Haeckel (1), but very different from Haeckel's (2) Genus Amphor- 

 iscus. • 



21. SPECIES. AMPHORISCUS CYLINDRUS. Von Lendenfeld. 

 SYCILLA CYLINDRUS. Haeckel (3. ) 



Radial tubes prismatic, dermal surface flat, smooth. Gastral 

 surface shortly spined. Gastral quadriradiates sagittal * rays 

 cylindrical, straight and short trunkate, 0*008 — 0*012 mm. thick. 

 Basal ray 0*24, both lateral ones 0*16, the free apical ray 

 which is slightly curved towards the Osculum only 0*06 — 0*09 mm. 



Parenchymal quadriradiate spicules sagittal ; radial rays 

 016 mm. thick. Basal 0*3, both lateral 0*2, and the straight 

 centrifugal apical ray 0-5 — 0*6 mm. 



Dermal quadriradiate spicules, all four rays are cylindrical at 

 basal half, 0*024 mm. thick, in the apical half slender, conic. 

 Basal ray straight, 0*5 mm. long, nearly twice as large as the 

 lateral rays, which are only 0*3 mm. The centripetal apical ray, 

 0*8 mm., reaches to the subgastral layer. 



Locality : Adriatic, E. Haeckel * East Coast of Australia, Port 

 Jackson, von Lendenfeld. 



22. SPECIES. AMPHORISCUS POCULUM. Pokjaeff (4.) 



The single specimen representing this species in the Challenger 

 collection is of tubular elongated form, 36 mm. long 4 mm. broad 

 in its middle and superior part ; towards the closed end the tube 



(1.) E. Haeckel. L.c. Seite 46. 



(2. ) E. Haeckel. Prodromus eines Systems der Kalkschwamme. Jenaische 

 Zeitschrift fur Medicin und Naturwissenschaft, 1S70. Band V., Heft 2., 

 Seite 238. 



(3.) E. Haeckel. L.c. Seite 254. Taf XLIIL, fig. 5-7. Band III. 



(4.) Polejaeff. Report on the Calcarea. The Zoologie of the Voyage 

 of H.M.S. Challenger, Part XXIV., p. 46, pi. IV., fig. 4; PI. V., figs. 

 2a-2f. 



