794 PROF. A. DENDY AND MR. R. W. H. ROW ON 



the latter has so long been in general use that it seems desirable 

 to retain it. Moreover, the earlier name was proposed by a 

 botanist for organisms which he regarded as plants, and the 

 generic diagnosis was hopelessly erroneous and misleading. 



SoLENiDiUM Haeckel [1872]. 



Type species S. nitidum Haeckel, (^^^ Leucosolenia nitida). 



SoLENiscus Haeckel [1870]. 



Type species ^S*. loculosus Haeckel, ( = Leucosolenia locidosa). 



SoLENULA Haeckel [1872]. 



TyjDe species S. coriacea Montagu, {=:Leucosolenia coriacea). 



Sphenophorina Breitfass [1898 B]. 



Type species S. singidaris Breitfuss, (=Grantia ? singidaris):. 

 This name was originally proposed for a sponge showing certain 

 apparently "great peculiarities in its skeletal structure and in 

 the form of its spicules. Possibly, if the structure described 

 really represents that of the sponge, it merits a distinct genvis, 

 but the fact that only a fragment was found, and that that frag- 

 ment had been preserved in spirit for no less than 33 years before 

 it was examined by Breitfuss, led us to doubt whether there had 

 not been some corrosion of the spicules during that time. This 

 opinion was supported by an examination of type slides which one 

 of us (Row) was able to make when in Berlin recently, for the 

 appearance of the specimens is just what might be produced by 

 the very slow eating away of the terminal portions of the s^^icule- 

 rays by very dilute acid. Under these circumstances we feel that 

 the genus had better be abandoned for the present, at any rate 

 until further material of the species assigned to it has been ob- 

 tained, and we have accordingly placed the only described species 

 provisionally in the genus Grantia. 



Sphbnophorus Breitfuss [1898 B]. 



Type species S. singular is Breitfuss, { = Grantia ? singidaris). 

 An earlier name for the previous genus, abandoned by its 

 author as being preoccupied. 



Spongia Linnceus [1758-1759]. 



The name under which the earlier known species of Calcareous 

 sponges were, in common with non-calcareous forms, described, 

 but now entirely abandoned. 



Streptoconus Jenkin [1908 B]. 



Type species S. australis Jenkin, {=Sycon australe). 

 One of the genera of Jenkins family Chiphoridte, which has. 

 been abandoned by us for reasons given above. 



