BY R. VON LENDENFELD, PH.D. 901 



•4. SPECIES. ASCALTIS LAMARKII. E. Haeckel. 



Lencosolenia Lamarkii. E. Haeckel. 



Prodromus eines Systems der Kalkschwamme, Jenaisehe 

 Zeitschrift fur Medicin und Naturwissenschaft, 1870- 

 Band V., Heft, 2, p. 243. 

 Aulorhiza intestinalis. E. Haeckel. 



Prodromus I.e., p, 250. 

 Ascaltis Lamarkii. E. Haeckel. 



Die Kalkschwamme, Eine Alonographie. Band II., p. 60. 

 Lencosolenia Lamarckii. Polejaeff. 



Report on the Calcarea. Zoology of the Voyage of 

 H.M.S. Challenger. Part XXIV., p. 36. 

 Triradiate and quadriradiate spicules regular, with equal angles 

 and rays. Some of the triradiate spicules much larger up to three 

 times as thick and long as the quadriradiate spicules. 



Forms irregular masses on seaweed, which attain a diameter of 

 5-20 mm., consisting of mouthless colonies, which are composed of 

 a net work of tubes. 



Skeleton, — The quadriradiate spicules possess straight, conic 

 rays ; the apical ray is as long or shorter than the facial rays, 

 vertical to the plane in which they lie. Often slightly curved, 

 Rays 0-08—0-12 x 0004— 0-006 mm. 



The triradiate spicules are of two sizes, the smaller ones are 

 regular with rays of equal length as in the quadriradiate spicules. 

 The larger ones often form a membrane in the outer surface, their 

 rays measure 0*2 — 0-3 x 0-015 — - 02 mm., they are mostly regular, 

 like the smaller kind, a few however have paired rays. 



Polejaefl's specimens possessed spicules which showed a greater 

 tendency towards sagittal differentiation. The rays of the large 

 triradiate spicules attained a size of 0-5 x - 06 mm. 



Special description and figures in Haeckel (I.e., Monogi'aphie.) 

 Colour : White or red. 



Locality : North Atlantic Ocean ; Coast of Alarocco (Magador, 

 Haeckel) ; Gibraltar (Tenarifa, Haeckel) ; Florida (Alexander 



