﻿SPONGES.-HALLMANN. 



299 



E. anchorafiim, \ar. dura, \V. (lathria (?) indurata, 



sp. no^•.2 



*K. aiiclionitiov, \ar. lamcUosa, L. ? ]]HsnncUa latnellosa, 



L. (p. 243) 



£. anchoraiiim, var. lanicUosa, W. Clathvia spicafa, sp 



nov. (p. 210) 

 E. /eT;/.v, L. (and W.) CrelJa incrustans, Carter, var 



Jevis, L. (p. 164) 



P^. rubra, L. (and W.) Crella incrustans, Carter, var 



levis, L. (p. 164) 



( latliria. — 



*('. macropora, L. ? Wilsonella macropora, L. (p. 240). 



r. macropora, W. Crclla i}icntsl(nis. Carter, var. arenacea. 



Carter (p. 161). 



('. pyramida, L. Wilsonella pyramida, L. (p. 240). 



*C. australis, L. ? Wilsonella australis, L. (p. 239). 



C. australis, W. Crella incrustans, Carter, var. arenacea, 



Carter (p. 161). 



T halas sodend ron. — 



*T. digitata, L. ? EchinocUalina digitata, L. (p. 288). 



*7'. typica, L. ? Wilsonella typica, L. (p. 203). 



T. typica, W. Echinodictyum. elegans, L. (p. 203). 



7'. riibens, var. cZ/rra, L. Clathria ruhens, L. (p. 219). 



1 For the sponge which Whitelegge (Eec. Aiistr. Mus., iv., 2, 1901, p. 81) 

 mistook for Lendenfeld's Ecliinonenui (tclioirituin var. dura, I now pro- 

 pose the name Clathria indurata. Whitelegge's description is substan- 

 tially correct except in regard to the dimensions of the spicules. His 

 use of the term "honeycomb-like," in reference to the external conforma- 

 tion of the sponge, however, is inappropriate ; and the statement that 

 "the texture is . . . minutely porous throughout" is correct only so far 

 as it applies to the surface, which is minutely porous over its entire 

 entent. As a matter of fact, the texture (of dry specimens) is particularly 

 dense and compact; and the consistency, in consequence, is unusually 

 firm and hard. The available specimens (three in num))er) are destitute 

 of any traces of a specialised dermal skeleton ; but the information which 

 they afford in this particular is unreliable, since their preservation is 

 imperfect; and it is possible, therefore, that the species may prove to 

 belong to Rhaphidophlus. Indeed, it is to be noted that in certain of its 

 spicular characters, more particularly in regard to its auxiliary mega- 

 scleres, it exhibits points of resemblance to RhaphidopMun tupicus; but 

 toxa are absent, and the chelae are of only a single kind. Thus, the 

 auxiliary spicules (subtylostyli) are pretty abundant; they exhibit a very 

 considerable range in length; the shortest of them -which are very 

 slender— are curved ; and a fair proportion are provided, upon their extreme 

 basal end, with a minute spination ; also, the acanthostyles, the spines of 

 which are moderately large, show a tendency towards a reduction of their 

 spination over the sub-basal portion of their length. The principal 

 spicules are without special feattires, being more or less curved, subconical 

 styli. The dimensions of the megascleres, taking into account their range 

 in length and maximum stoutness, are as follows :— Principal, 120 to 200 

 x 13 jx; accessory, 55 to 70 x 7.5 ji : auxiliary, 95 to 220 x 5.5 )i. The greatest 

 length of the chelae is 12 ji- The "ill-defined and hair-like spicules men- 

 tioned in Whitelegge's description as being present in small number m 

 the ground substance, were no doubt some of the very slenderest of the 

 auxiliary spicules. 



