158 Rev. T. Ilincks's Conirihuiions towards 



Busheij Heller), Straits of Magellan, New Zealand, Mediter- 

 ranean ; D. inermis, Busk, New Zealand, Straits of Magellan ; 

 D. costata, Busk, Kerguelen Island, Australia ; D. spini- 

 ^era, Australia ; D. hirtissima, Heller [=: Chaunosta hirtis- 

 sima, Busk), Adriatic, Cape of Good Hope ; D. armata, Heller, 

 Adriatic ; Z>. patellaria, Moll { — D. simplex^ Heller, and 

 MolUa patellar ia^ Sraitt — generically distinct), Adriatic; D. 

 Buskiana, Hutton, New Zealand. 



Family Myriozoidae (part), Smitt. 



ScHizoPORELLA, Hincks. 



Schizoporella argentea^ n. sp. 

 (PI. IX. figs. 6, 6 a.) 



ZocBcia ovate, irregularly disposed, convex, strongly sutured, 

 separated by inconspicuous lines, very distinctly and beauti- 

 fully granulated over the entire surface, punctured round the 

 margin, greyish white, lustrous ; orifice suborbicular, produced 

 below into a pointed sinus ; peristome not raised ; along one 

 side of it a large mound-like elevation, rising to a point above, 

 on the inner face of which is an erect avicularium, with acute 

 mandible directed upwards ; on the opposite side, just beyond 

 the sinus, a short spinous process ; on the upper margin two 

 or three spines ; in many cases the oral avicularium, instead 

 of being erect and close upon the margin, is turned downwards 

 and outwards, is much elongated, and stretches down about 

 half the length of the cell. Ooecia rounded, thickly granu- 

 lated and punctured. Zoarium of very delicate texture, 

 greyish white, silvery. 



Loc. Africa, on coral {Miss Jelly) 



Schizoporella linearis^ Hassall, form quincuncialis. 

 (PI. IX. fig. 3.) 



ZooBcia ovate, occasionally lozenge-shaped, moderately 

 convex, separated by lines, quincuncially arranged ; surface 

 bright and silvery, thickly punctured • orifice suborbicular, 

 with a shallow pointed sinus on the lower margin, a ridge-like 

 callosity placed longitudinally immediately below the sinus j 

 at each side of the orifice, usually almost close to the top of 

 the cell, a mound-like rising, bearing a small avicularium j 

 mandible acute, generally directed upwards. Ocecium (?). 



Loc. Ceylon {Miss Jelly). 



In general appearance this variety is very unlike the well- 

 known S. linearis. Its zooecia exhibit none of the depres- 

 sion of surface and definite linear arrangement which are so 

 characteristic of the normal form ,• they are ovate, convex, 



