BY R. VON LENDENFELD, PH.D. 897 



If we were not to attach great importance to the chemical 

 nature of the skeleton we would have to place the Physemai-ia — 

 those that are Sponges — in this Suborder because they resemble 

 the Asconidse very closely, I think it very probable that this will 

 be done in fiitui-e, when the Embryology of these doubtful 

 organisms is better known. 



1. FAMILY. ASCONID^. Claus (1.) 

 HOMOCCELA WITH A PLAIN POROUS BODY WALL, WITH- 

 OUT ANY COMPLICATION OF THE INNER SURFACE. 



The Asconidse are identical with Haeckel's (2) Ascones. 

 PolejaefF (I.e.), comprises all species in Bowerbank's (3) Genus 

 Lencosolenia. Although the difference between the Genera of 

 Haeckel may in many cases appear trivial, I shall nevertheless 

 adopt them here. The soft parts of only very few have been 

 studied, so that any classification must appear preliminary, 



1. GENUS. ASCETTA. Haeckel, 1872. 

 Asconidae possessing triradiate spicules only. 



1. SPECIES ASCETTA PRIMORDIALIS. E. Haeckel. 

 Prosycum primordialis. E. Haeckel. 



Prodromus eines Systems der Kalkschwamme. Jenaische 



Zeitschrift fur Medicin und Naturwissenschaft, 1870. 



Band v., Heft, 2, p. 236-257. 

 Olynthus simplex. E. Haeckel. 



Prodromus, I.e., p. 237. 

 Lencosolenia dictyoides. E. Haeckel. 



Prodromus, I.e., p. 243. 

 Soleniscus loculosus. E. Haeckel. 



Prodromus, I.e.. p. 244. 

 Clathrina loculosa. E. Haeckel. 



Prodromus, I.e. p. 245. 



(1.) C. Claus. Grundzuge der Zoologie, IV., Anflage. Seite 22L 



(2 ) E. Haeckel. Die Kalkschwamme, eine Monografie. Band II. Seite 



11. 



{3.).y. S. Boiverbank. On the Anatomy and Physiology of the Spongiadae. 



Transactions of the Royal Society of London. Vol. 152, p. 1094. 



