BY E. F. KALLMANN. 347 



Renierinae, with smooth surface and fibrous skeleton ; the 

 spicules are partly embedded in spongin." From the descrip- 

 tions of the two species, we learn, further, that the skeleton 

 consists of "three systems of fibres — one longitudinal extend- 

 ing from the base to the margin of the lamella, the second 

 transverse, and the third perpendicular to the plane in which 

 the other two extend" ; that these fibres, thus forming a rec- 

 tangular meshwork, consist of bundles of somewhat irregular 

 spicules ; and that the spicules are pointed diactinals of mode- 

 rate size accompanied or not by relatively few styli. In the 

 typical species, R. sfalag??rites, the spicules are oxea exclusive- 

 ly. It would appear, therefore, that Reniochalina is very 

 similar to the genus Axinosia established by me in the present 

 paper for Axinella symhiotica Whitelegge and like species, ex- 

 cepting that, in the latter, the spicules are predominantly 

 styli. Several species (as yet undescribed) differing from Axino- 

 sia apparently only in the fact that their spicules are exclusive- 

 ly or almost exclusively oxeote are known to me ; and for the 

 accommodation of such species, I think, the genus Reniocha- 

 lina might provisionally be made to serve. I am doubtful, 

 however, whether these species will ultimately be found separ- 

 able from the genus Reniera, unless on the additional ground 

 of their lamellar external form. 



It will be noticed in the case of Reniochalina lamella that 

 the description which Lendenfeld gives of its external charac- 

 ters, wherein the surface of the sponge is stated to bear conuli, 

 is contradictory to his definition of the genus. There is reason 

 to suspect, therefore, that the external features ascribed to 

 this species are those of a different sponge from that upon 

 which the description of its skeletal characters was based and 

 to which the name Reniochalina lam ell a. was intended to 

 apply. 



Familia HETERORRHAPHID^. 



Subfamily Stylotelli n^. 

 Under this subfamily, erected expressly for their reception, 

 there are described in the Catalogue four species, for which 



