518 DR. J. E. GRAY ON Sl'ONGES. [MaV 9, 



these variations the forms of the spicules afford good specific cha- 

 racters, each species having a single form or a series of variations 

 peculiar to itself. 



Fam. 1. Halichondriad^. 



Sponge massive. Skeleton composed of cyhndrical, fusiform, or 

 l)in-shaped spicules, often varying in form in the same sponge, vari- 

 ously fasciculated together, or rarely single, and united by a small 

 quantity of horny matter. Sarcode fleshy or granular. 



* Spicules fusiform or needle-Uke. 

 1. Reniera. 



Sponge massive, rugose. Skeleton reticulated, strengthened with 

 spicules. Spicules of one shape, fusiform or needle-hke (varying in 

 size). 



Reniera, O. Schmidt, Sp. Adriat. p. 72, 



IJymeniacidon, Bovverb, Brit. Sp. 



IIeniera thomasii. 



Hymeniacidon thonasii, Bowerb. B. Sp. p. 155. 



See also — 



//. coccinea, Bowerb. ib. p. 156. 



H. hrettii, Bowerb. ib. p. 158. 



H.fragilis, Bowerb. ib. p. 159. 



H. reticulatus, Bowerb. ib. p. 159. 



H.fallaciosus, Bowerb. ib. p. 160. 



//. albescens, Bowerb. ib. p. 161. 



H. luctea, Bowerb. ib. p. 163. 



H. memhrana, Bowerb. ib. p. 165. 



H. caruncula, Bowerb. ib. p. 166, t. /. f. 3/2. 



//. sanguinea, Bowerb. ib. p. 168. Sponyia sanyuinea. Grant. 



//. mmnmeuUi, Bowerb. ib. p. 170. 



i/. consimilis, Bowerb. ib. p. 172. 



H.faUax, Bowerb. ib. p. 177. 



H. viridans, Bowerb. ib. p. 178. 



H. perleiiis, Bowerb. ib. p. 179. Sponyia perlevis, Mont, (spi- 

 cules subpin-shaped). 



H. aurea, Bowerb. ib. p. 181. Sponyia aurea, Mont. 



H. armatura, Bowerb. ib. p. 183. 



H. p achy derma, Bowerb. ib. p. 184. 



H. crustida, Bowerb. ib. p. 185 (spicules subpin-shaped). 



H. viryidtosa, Bowerb. ib. p. 193. 



Hcniera aqu(ediictus,0. Schmidt, Sp. Adriat. p. 73, t. 7. f. 6. B.M. 



R. cratera, O. Schmidt, ib. f. 7. B.M. 



R. alba, O. Schmidt, ib. f. 8. 



R. niyrescens, O. Schmidt, ib. p. 74. B.M. 



R. palmata, O. Schmidt, ib. p. 74. I Sponyia palmatu, Solander 

 & EUis. B.M. 



