the ' Challenger ' Monaxonida. 349 



terminating in a sharp spur (constant) ; (2) bipocillate 

 spicules * (almost always present) . 



lojplion chelifer, n. sp. 



Massive, honeycombed. Light brown to black. Soft and 

 crumbling. Skeleton loose. Spicules: — (1) spined acuates, 

 size *4by '02 millim.; (2) bicapitate cylindricals, size '3 by "Ol 

 millim., with microspined heads j (3) palmate inequianchorates 

 as usual, '019 to "03 millim. long; (4) large bipocillated 

 spicules •019 millim. long, of very peculiar form, shaft narrow 

 and much bent, small end clawed, with two prongs, large end 

 bearing two, tliree, or four expanded, flattened flukes, which 

 together form a cup. 



Localities. Station 142, off Cape of Good Hope, 150 fath. ; 

 Station 145 A, off Prince Edward's Island, 310 fath. ; Sta- 

 tion 148 A, between Prince Edward's and Kerguelen Islands, 

 550 fath. 



lophon cylindricuSj n. sp. 



Erect, cylindrical ; diameter I inch. Brown. Brittle and 

 crumbling. Spicules : — (1) bicapitate cylindricals with smooth 

 shaft and distinct, microspined heads, size "2,2 to "29 by '008 

 millim. ; (2) smooth acuates, sharp-pointed, size '29 by *01 

 millim. ; (3) palmate inequianchorates as usual, length 

 •025 millim. ; (4) bipocillates of usual shape, length •0127 

 millim. 



Locality. Station 163 a, off Cape Howe, Australia, 120 

 fath. 



loplion laminalis^ n. sp. 



A number of irregular, flat or slightly curved, cake-like 

 expansions ; possibly cup-shaped when perfect. Thickness of 

 lamellee ^ to f inch. Dark reddish brown. Texture loose, 

 crumbling. Spicules : — (1) bicapitate cylindricals, heads 

 sometimes microspined, size "34 by '0013 millim. j (2) large, 

 smooth subspinulates, size "63 by "022 millim., rather abruptly 

 sharp-pointed : (3) palmate inequianchorates, '025 millim. 

 long ; (4) bipocillates, '013 millim. long, consisting of a curved 

 shaft with a large cup- shaped expansion at one end and a 

 small one at the other. 



Locality. Station 145 A, off Prince Edward's Island, 310 

 fath. 



* For a figure of this spicule vide Bowerbank, ' Mon. Brit. SpoDg.' 

 vol. i. pi. V. figs. 124, 125, 126. 



