l85 "ENDEAVOUR" SCIENTIFIC RESULTS. 



(/) Jar. OBESi'S, );(</;;. iiov. 



1901. (laihria typica, Whitelegge, Rec. Austr. Mus., iv., 2^ 

 1901 , p. 80, p. 117. 



(g-) I'ar. STELLii-ER, var. nov. 



(/() I'ar. FAVosus, Whitelegge. 



1907. Clalliria favusa, Whitelegge, Austr. Mus. Mem., iv.^ 

 10, 1907, p. 498. 



(it'iieral Diagnosis. — Spongf, in the diftcrcnt varieties, 

 ramose, lanwlliform or sub-massive. Oscula absent? 

 Dermal membrane strongly developed, appearing in the 

 dry sponge as a ivhitish pellicle or incrustation. Texture, 

 as revealed by the removal of the dermal coveriiig, 

 rather loose and porous. The moderately stout fibre 

 forms a rather wide-meshed reticidation. The main fibres 

 contain a dense spicular core, the connecting fibres, with 

 rare exception, are devoid of axial spicules. Smooth styli 

 are extremely abundant in the ground tissues. Acan- 

 thostylcs occur not otdy as more or less deeply imbedded 

 echinating spicules, but also scattered within and between 

 the fibres. They are more abundant on the outer ex- 

 tremeties of the fibres than elsewhere. The dermal skele- 

 ton is precisely of the same type as in the preceding 

 species. Megascleres : — In addition to acantlwstyles 

 there are three kinds of stylote spicules, principal, aux- 

 iliary, and special dermal, occurring in the same relations 

 as in the preceding species. A certain proportion of the 

 last-mentioned exhibit a minute basal spination. (i. ) The 

 principal styli are the stoutest spicules; they are, for the 

 most part, slightly curved; they vary in maximum size in 

 the different known varieties from abotit 200 x 6 }i to 

 about joo x ij ji. (n.) The acanthostyles are distin- 

 guished by the absence or marked reduction of spines over 

 a considerable portion of their basal moiety. {Hi.) The 

 auxiliary styli are straight or flexed, and are alivays 

 longer and slenderer than the principal, {iv.) The special 

 dermal styli are usually curved and slightly sub-fusiform; 

 The greatest curvature is in the basal half of their length; 

 in size they are rarely above ijo-i^o x 4-5 jt. Micro- 

 scleres : — These are of three kinds: — (/. ) Larger palmate 

 isochelcc, /5-20 p long; {ii.) smaller palmate isochelcB of 

 which a certain proportion are contort, 'j-ii \i long; {Hi.) 

 hair-like toxa of indefinite length, frequently passing into 

 amorphous forms, occurring both si)igly and in buridles. 



