350 On the ' Challenger ' Monaxonida. 



lophon ahnormalisj n. sp. 



Cylindrical, branched; brittle and crumbling. Black. 

 Spicules : — (1) bicapitate cylindricals with spine J heads, size 

 '28 bj '008 millini. ; (2) acuates, generally spined at the base 

 and also slightly at the apex, size '35 by '0126 millim. ; (3) 

 large palmate inequianchorates, '0378 millim. long, and of 

 the usual lophon type, chiefly in rosettes. Also smaller ones 

 of about half the size, but not in rosettes. No bipocillates. 



Locality. Off Marion Island, 50-75 fath. 



Genus Amphilectus (Vosmaer) . 



We make use of this genus in the manner indicated by its 

 founder, namely, as a provisional receptacle for a number of 

 species of doubtful position. 



Amphilectus ajjollints, n. sp. 



Massive, amorphous. Light greyish yellow. Rather soft 

 and spongy. Skeleton loose, confused. Spicules : — (1) slender 

 acuates or subspinulates, gradually sharp-pointed, often micro- 

 spined at the base, size '315 by '0063 millim. (dermal) ; 

 (2) stout, smooth acuates, size '5 by '0168 millim. (in main 

 skeleton) ; (3) small palmate equianchorates, length '015 

 millim. ; (4) large tricurvates with spined ends, size '3 by 

 •0045 millim. 



Locality. Royal Sound, Kerguelen, 20-60 fath. 



Amphilectus ceratosus, n. sp. 



Massive, lobate. Dark reddish brown. Spongy, elastic, 

 but fairly compact. Surface glabrous, but with small angular 

 conuli. Vents small and scattered. Skeleton : — (a) main, a 

 reticulation of horny fibre, 07 millim. thick, with no spicular 

 core, and irregularly scattered spicules, which occur also in 

 wisps near the surface ; {b) dermal, irregularly scattered spi- 

 cules. Spicules: — (1) smooth bicapitate cylindricals with oval 

 heads, size '24 by '003 millim. ; (2) palmate equianchorates, 

 length '025 millim. 



Locality. Off Port Jackson, 7 fath. 



Amphilectus jnlosus^ n. sp. 



Pedunculate, lobate. Dark chocolate-brown ; texture 

 coarse and hairy, but rather compact. Surface pilose, 

 shao-o-y, with deep longitudinal grooves. Spicules : — (1) bica- 

 pitate cylindricals, lieads usually microspined, size '42 by 



