1868.] DR.T. SALVADORI ON \ NEW LEUCOSTICTE. 579 



paler brown, projecting, horny points, divergent at the ends, and 

 producing a spinulose surface. The branchlets tapering to a point, 

 with a series of acute divergent tufts of spicules on each side (oscules 

 or cells), with a small circular mouth below the produced acute 

 outer edge of the tufts of spicules ; one of the tufts is placed at the 

 end of the branchlet, and the tufts seem to be produced at the base 

 of the previously formed tufts. 



Ceratella fusca. (Fig. 2, p. 5/8.) B.M. 



Coral expanded, fan-shaped, forming an oblong frond ; branches 

 divergent from the base, with numerous lateral, subalternate, sub- 

 dichotomous branches ; similar but smaller lateral branchlets. 



Hab. Australia, New South Wales, at the head of Bondy Bay. 



2. Dehitella. 



Sponge or coral dichotomously branched, expanded, growing on 

 a large tuft from a broad, tortuous, creeping base, of a dark brown 

 colour, and uniform hard rigid substance. Stem hard, cylindrical, 

 opake, smooth ; branches and branchlets tapering to a point, cylin- 

 drical, covered with tufts of projecting horny spines on every side ; 

 those on the branches often placed in sharp-edged, narrow, trans- 

 verse ridges ; those of the upper branches and branchlets close but 

 isolated, and divergent from the surface at nearly right angles. 



This genus is distinguishable from Ceratella by the greater thick- 

 ness and cylindrical form of the stem, by the more tufted and irre- 

 gular manner of growth, and by the tufts of spicules (oscules or 

 cells) being more abundant and equally dispersed on all sides of the 

 branches and branchlets. 



Dehitella ATRORUBENS. (Fig. 1, p. 5/8.) B.M, 



Hab. Australia? 



4. Description of a New Species of the Genus Leucosticte. 

 By Thomas Salvadori, M.D., C.M.Z.S. 



(Plate XLIV.) 



Leucosticte gigliolii, sp. nov. (Plate XLIV.) 



Leucosticte fusco-puijmrascens ; pileo, gula et pectore fusco- 

 griseo-sericeis ; pilei ac pectoris plumis obscure marginatis ; 

 plumis nasalibus et regionibus ante et supra oculos rubescen- 

 tibus ; cervice sordide griseo-rufescente, dorso et scapularibus 

 briinneis vix rubescente tinctis, uropygio magis rubra ; supra- 

 caudalibus nigricantibus apice obscure rubescentibus, ultimis 

 nigris griseo tinctis ; abdomine fusco-rubescente ; subcaudali- 

 bus nigricantibus ; alis nigricantibus, remigibus subtilissime 

 rufescente limbatis, tectricibus alarum minoribus subtilissime 

 rubro marginatis ; subalaribus iiitense plumbeis ; cauda nigri- 



