tJie ' Challenger ' Monaxonida. 345 



teeth at eacli end, lateral processes well developed, length 

 •085 millim. ; (3) slender bihamates, length -055 niillim. 



Locality. Station 147, between Prince Edward's and Crozet 

 Islands, 1600 fath. 



Chondrocladia clavata^ n. sp. 



A very small globular head perched on the end of a slender 

 stalk, which is short, and at the bottom breaks up into a tuft 

 of rootlets. From various parts of the head radiate long 

 slender processes. Diameter of head about yj inch. Pale 

 yellow. Spicules : — (1) slender acuates, size variable, up to 

 1"0 by '022 millim. ; (2) tridentate equianchorates of the usual 

 Chondi-odadia-iy^Q,^ length '057 millim. ; (3) bihamates 

 about '044 millim. long. This sponge makes a near approach 

 to the typical Crinorrhiza-fomi. 



Locality. Station 174, Fiji Islands, 140 fath. 



Chondrocladia crinita, n. sp. 



Sponge of the Crifiorrhiza-form • consisting of a conical 

 body, terminating above in a spike-like projection. Base 

 fringed by a number of long, coarse, hair-like processes, and 

 with a stout papilla projecting from its centre. Diameter of base 

 jV inch. Brownish yellow. Spicules : — (1) slender acuates, 

 size in the main fibres about 2'2 by '044 millim ; (2) large, 

 tridentate equianchorates of the usual Chondi-ocladia-t'ovm, 

 length about '1 millim. ; (3) slender bihamates, length about 

 •07 miUim. 



Locality. Station 216 a, north of New Guinea, 2000 fath. 



Genus Desmacidon (Bowerbank). 



Form various. Skeleton-spicules acerate to cylindrical. 

 Flesh-spicules equianchorates and usually bihamates. 



Desmacidon reptans^ n. sp. 



Incrusting other sponges or free, massive, amorphous, or 

 digitate. Greyish yellow. Texture fairly firm, resilient. 

 Vents and pores small and scattered. Dermal skeleton usually 

 well developed, with fibre composed of proper spicules and 

 foreign bodies, and with meshes which vary a good deal in 

 width. Spicules : — (I) smooth acerate.s, sharply and rather 

 abruptly pointed, size "18 by '008 millim. ; (2) equianchorates, 

 with three sharp teeth at each end, and no palms, length 

 •019 millim ; (3) simple or contort bihamates, about "038 

 millim. long. 



Locality. .Off Bahia, 7-20 fath. 



