788 PKOF. A. DENDY AND MR. R. W. H. ROW ON 



the modification of Haeckel's original system proposed by von 

 Lendenfeld in 1891. The name has also been used by Minchin 

 [1896, 1900, &c.] in an entirely different sense for a genus whose 

 type, and only, species was A. fcdcata, placed by us in the genus- 

 Leiicosolenia. In the latter sense it is the equivalent of von Len- 

 denfeld's Roinandra. 



AscETTA Haeckel [1872]. 



Type species A. primordialis Haeckel, (:= Leucosolenia 



primordicdis). 



As employed by Haeckel, this genus includes only species 



whose whole skeleton is composed of triradiates ; von Lendenfeld,. 



however, has used it [1891] to include all those ascon s|)onges 



which do not possess oxea. 



AsciLLA Haeckel [1872]. 



Type species A. g^raaYis^Haeckel, { = Leucosolenia gracilis). 



AscoMETRA Haeckel [1872]. 



Type species A. primordiale Haeckel, (:= Leucosolenia 

 primordialis) . 

 The name Ascometra was used by Haeckel, in the " artificial 

 system " given at the end of his ' Monographie,' to replace the 

 name Thecometra used for exactly the same group in his earlier 

 ' Prodromus,' and for no apparent reason save nomenclatorial 

 symmetry. He gave his new genus, however, a different type 

 species. 



AscoRTis Haeckel [1872]. 



Type species A. horrida Haeckel, (^:= Leucosolenia horrida). 



AscuLMis Haeckel [1872]. 



Type species A, armata Haeckel, { = Leucosolenia armata). 



AscuRis Haeckel [1872]. 



Type species A. arrecifce Haeckel, (= a variety of Leucoso- 

 lenia canariensis). 



AsTROSCLERA Lister [1900]. 



Type species A. wUleyana Lister. 

 Although originally described as a member of the Calcarea, this 

 sponge is now known to be an aberrant member of the Non- 

 calcarea {vide Kirkpatrick [1912]). 



AuLOPLEGMA Haeckel [1870]. 



Type species A. loctdosum Haeckel, '(=Zei/:cosoZema locidosa), 



AuLORHizA Haeckel [1870]. 



Type species A. intestinalis Haeckel, (= Leucosolenia 

 lamarckii). 



