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



slightly flexed outwards, and grouped en Jleur-de-Us (figs. 9 

 &10). 



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

 large head and many small circumferential spines (PI. 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 thick. 



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 scopuline and an umbrella-like headed 

 shaft. 



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

 flexed e7i fleur-de-lis (Atlantisch. Spongienf. Taf. i. fig. 19). 



Scopuline shaft headed with several attenuated pointed rays, 

 slightly divergent, bnish-like [ih. Taf. i. fig. 18). 



Umbrella-like headed spino-capitate spicule consisting of a 

 straight shaft with convex head spined at the circumference 

 {ih. Taf. i. fig. 20). 



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



Species infundibuliform ; tvall compounded of subrectangular lattice- 

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

 ing the rosette only. 



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

 expanded and arranged e?i fleur-de-lis (PI. XIII. fig. 9, & 

 PI. XVII. fig. 4). 



Farrea infundibular is, Carter, n. sp. Caribbean Sea. (14) 



Species stalked, dichotomously branching ; branches terminating in 

 oviform heads, each ivith a terminal aperture. 



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



