THE GENERA AND SPECIES OP ROSSELLIDAE. 



51 



actins. Afferent apertures smaller. Spieulation similar to that of foregoing 

 species, but rays of autodermalia and autogastralia almost smooth at base ; inter- 

 medial oxyhexaster 76 — 103 fi in diameter ; discohexaster 60 — 76 ft in diameter, 

 with about 6 slender terminals to each principal. 

 Loc. : Sagami Sea. 



Rossella, Carter. 



Autodermalia, stauractins or pentactins. Hypodermal pentactin present. 

 Gastralia, hexactins. Parenchymal megascleres may contain hexactins of me- 

 dium size or under. Intermedia consist of oxyhexaster and of two kinds of dis- 

 cohexasters (macrodiscohexaster and microdiscohexaster). 



27. R. antarctica, Carter. 



Carter (Ann. and Mag. Nat. Hist., 1872, p. 409). Schulze (Chall. Rep. 

 Hex., p. 139, pl. LV). (Rev. Asc. u. Ross., p. 536). — Acanthascus grossularia, 

 Schulze (Chall. Rep. Hex., p. 145, pl. LVI). 



Loc. : S. of Kerguelen Isl.; SE of Prince Edwards Isl.; Possession Isl. 



28. R. longispina, Ijima. 



Lima (Zool. Anz., 1896, p. 253). Schulze (Rev. Asc. u. Ross., p. 538). 

 Loc. : Sagami Sea. 



29. R. dubia (F. E. Sch.) 



Jeanthascus dubiw, Schulze (Chall. Rep. Hex., p. 147, pl. LVII 8 — 13).— 

 Rosella dubia, Schulze (Rev. Asc. u. Ross., p. 537). 

 Loc. : S. of Puerto Bueno, Patagonia. 



Aulos accus, Ijima. 



Autodermalia, stauractins or pentactins. Hypodermalia, only diactins ; 

 without pentactins. Gastralia, hexactins. Parenchymal megascleres, only 

 diactins. Intermedia consist of oxyhexasters with tendency to become hemi- 

 hexactinose or even perfectly hexactinose, and of two kinds of discohexasters 

 (macrodiscohexaster and microdiscohexaster). 



30. A. schulzei, Ijima. 



Ijima (Zool. Anz., 1886, p. 252). Schulze (Rev. Asc. u. Ross., p. 543). 

 Loc. : Sagami Sea. 



