360 Mr. H. J. Carter on the Hexactinellidse. 



slightly flexed outwards, and grouped en fleur-de-lis (figs. 9 

 &10). 



Umbrella-like headed shaft of two kinds, viz. one with 

 large head and many small circumferential spines (PL XV. 

 fig. 4) , and the other with small head and few long spines ; 

 the latter microspined on the inner aspect (fig. 5) ; each form 

 flatly convex, or umbonate, and both passing into each other 

 by gradational varieties. 



Aulodictyon Woodwardii, Kent. Portugal. (11) 



Species tubular, branched; branches open and slightly expanded at 

 the free extremities ; wall very thin, only one layer thiclc. 



Farrea occa, Bowerbank. Seychelles, &c. (12) 



Note. All that is known of this species is that its skeleton 

 is thin, tubular, branched, and composed of subrectangular 

 lattice-like fibre, only one layer thick. Deciduous skeletons 

 alone have as yet been found. (See an account, with illustra- 

 tions, of what spicules have been discovered in the deciduous 

 fragments, further on.) 



The same : possessing both a scopidine and an umbrella-like headed 



slutft. 



Rosette many-rayed : rays of equal length, sigmoid, capitate, 

 flexed en fleur-de-lis (Atlantisch. Spongienf. Taf. i. fig. 19). 



Scopuline shaft headed with several attenuated pointed rays, 

 slightly divergent, brush-like (ib. Taf. i. fig. 18). 



Umbrella-like headed spino-capitate spicule consisting of a 

 straight shaft with convex head spined at the circumference 

 (ib. Taf. i. fig. 20). 



Farrea fecunda, Schmidt. Florida, Cuba. (13) 



Species infundibidiform ; wcdl compounded of subrectangular lattice- 

 like, overrun by dendritic, branched, anastomosing fibre. Possess- 

 ing the rosette only. 



Rosette many-rayed ; rays of equal length, sigmoid, capitate, 

 expanded and arranged en fleur-de-lis (PI. XIII. fig. 9, & 

 PL XVII. fig. 4). 



Farrea infundibularis, Carter, n. sp. Caribbean Sea. (14) 



Species stalked, dicJiotomously branching; branches terminating in 

 oviform heads, each with a terminal aperture. 



Rosette many-rayed : rays of equal length, straight, capitate 



