50 



t. IJIMA. 



Loc. : Banda Islands. 



Aulo elio ne, F. E. Sch. 



Autodermalia and gastralia, predominantly or exclusively pentactins. Hy- 

 podermal pentactins wanting. Parenchymal megascleres without hexactins. 

 Sponge-body with gastral surface everted to a great extent so as to form a large 

 part of the external surface ; with long tubular stalk. 



23. A. cylindrica, F. E. Sch. 



Schulze (Ciudi. Rep. Hex., p. 168, pl. LXVI and pl. LXVIII l).-C/«- 



teromorpha cylindrica, .Schulze (Rex. Asc. u. Ross , p. 542). 

 Loc. : NE of Keriuadec Islands. 



'24. A. lilium, F. E. Sch. 



Schulze (('hall. Rep. Hex., pi. 171, pi. LXVIII 3— 7).— Crater, 

 lilium, Schulze (Rev. Asc. u. Ross., p. 542). 

 Loc. : Meaugis Islands, NE of Celebes. 



H y a lascus, Ijima. 



Autodermalia, pentactins with distally directed sixth ray represented by a 

 knob-like boss ; occasionally genuine hexactins. Pentactin hypodermalia present. 

 Gastralia hexactins. Parenchymal megescleres, solely diactinic. Intermedia of 

 two kinds : Oxyhexader with 1 or more and often all principals bearing only one 

 terminal (hemi-oxyhexaster and hexactinose oxyhexaster). Discoliexader of 

 small or moderately large size. Sponge-body probably unstalked, vase-like. 



This genus is decidedly to be taken up in EostsclliiKt, notwithstanding the 

 occasional occurrence of hexactinic autodermals. 



25. H. sagamiensis, Ijima. 

 Ijima (Zool. Anz., 1896, p. 251). 

 Loc. : Sagami Sea. 



26. H. giganteus, n. sp. 



Known to me by a very large fragment of light, cavernous texture. Effer- 

 ent apertures on gastral side as large as 18 mm. in diameter, covered over by an 

 irregularly meshed lattice-work consisting mainly of strands of hypogastral di- 



