the ' Challenger ' Monaxonida. 347 



form, anterior palms oval, maj be slightly turned out at 

 the end, shaft with a delicate lateral expansion all the way 

 along, length "028 millim. 



Locality. Royal Sound, Kerguelen, 25 fath. 



Homceodictya grandis^ n. sp. 



The single specimen consists of a large, broad, very much 

 flattened lamella, presumably of erect growth, at the upper 

 edge proliferating into compressedly digitate branches. Great- 

 est breadth of specimen 11 inches, greatest height 6 inches, 

 thickness jV to 5 inch. Grreyish yellow. Firm, tough, fibrous, 

 resilient. Surface fairly even, but minutely conulose and 

 minutely hispid. Vents small, in stellate groups of about four 

 each, on one side only of the frond ; very abundant. Skeleton 

 well developed, composed of stout Axinellid-like spiculo-fibre. 

 Spicules : — (1) stout, fusiform acerates, bent in the middle, 

 gradually sharp-pointed, size '45 by '04 millim. ; (2) large 

 palmate equianchorates of the usual type, but with the middle 

 portion of the shaft not laterally expanded, though often with 

 an irregular swelling, length 'OGS millim. 



Locality. Simon's Bay, Cape of Good Hope, 10-20 fath. 



Genus Aetemisina (Vosmaer). 



Sponge compact, texture cork-like, as in typical Suherites. 

 Skeleton-spicuies acuates or subspinulates. Flesh-spicules 

 equianchorates, and tricurvates with spined ends. 



[Artemisina siiberitoides^ Vosmaer. 

 Locality. Station 49, south of Nova Scotia, 85 fath.] 



Genus Phelloderma *, n. g. 



Corticate, with cork-like rind. Skeleton radiately arranged. 

 Skeleton-spicuies smooth acuates. Flesh-spicules equi- 

 anchorate. 



Phelloderma radiatum^ n. sp. 



Subglobular, with concave base of attachment, \ inch in 

 diameter, with cork-like cortex '24 millim. thick. Light 

 brown. Vents (?few, scattered, each on a small papilla). 

 Skeleton radiately arranged, fibres terminating at the surface 

 in brushes of spicules whose points are imbedded in the dense 

 cortex. Spicules : — (1) straight acuates or subspinulates, gra- 

 dually sharp-pointed, with the shaft slightly bulbously dilated 



* (^fXXof, cork ; Sep/xa, skin. 



