1867.1 DR. J. E. GRAY ON SPONGES. 511 



with central lines of spicula and grains of sand, and other extraneous 

 matter, especially in the larger and thicker fibres. 



Stematumenia, Bowerb. Ann. & Mag. N. H. 1845, xvi. p. 40G, 

 t. 14. f. 1, 2. 



Hh'cinia, sp., O. Schmidt. 



Sarcotragus, O. Schmidt. 



Stematumenia bahamensis. 



Bahama sponge, Bowerb. B. Sp. i. p. 2/3, f. 2G9, f. 381. 



Hah. Bahama. 



Fam. 5. Dysideid.e. 



Sponge massive, formed of reticulated horny fibres, with sand (or 

 the spicula of other sponges) imbedded in the centre, and covered 

 with a more or less thick coat of horny matter. 



Dysidea. 



Sponge massive. Skeleton irregular, netted. 



Dysidea, Johnston, Brit. Sp. p. 251 ; Bowerb. B. Sp. 18G2; O. 

 Schmidt, Spon. Adriat. Supp. ii. p. 11, 



Diiseideia, Johnston, B. Sp. p. 185, 1842. 



Spongelia,^&\i^o, 1844; O.Schmidt, 1862. 



Dr. G. Johnston described a sponge under the name of Spongia 

 suberea in ' Mag. Nat. Hist.' vii. p. 491 , f. GO, which, in his work on 

 Sponges, he referred to the genus Dtneideia with a mark of doubt, 

 observing at the same time " it is nearly allied to the Alcyoniinn 

 ocellatum of Solander (Zooph, p. 180, t. 1. f. G), and it is probable 

 that the two productions are of the same nature, whatever they may 

 be." They have proved both to be zoantJwid polypes. 



1. Dysidea fragilis, Johnston, B. Sp. p. 251 ; Bowerb. B. Sp. 

 ii. p. 381, i. p. 211. f. 270-272. B.M. 



Duseideia fragilis, Johnston, B. Sp. p. 1 8G, t. 13. f. G, t. 14. f. 4. 



Halichondria areolata, Johnston, B. Sp. p. 121, t. 13. f. 4. 



Spongia fragilis, Mont.Wern. Mem. ii. p. 114, t. IG. f. 1, 2. 



See also : — 



Spongelia elegans, Nardo ; 0. Schmidt, p. 28, t. 3. f. 3. B.M. 



S. avara, O. Schmidt, p. 29, t. 3. f. G. B.M. 



S. incrustans, O. Schmidt, p. 29, t. 3. f. 7. 



S. pallescens, 0. Schmidt, p. 30, t. 3. f. 8. B.M. 



2. Dysidea kirkii, Bowerb. B. Sp. i. p. 21 1. 

 Hah. Australia (not described). 



Fam. G. Chalinid.e. 



Skeleton formed of regular, reticulated, anastomosing, horny fibres, 

 which have one or more series of regular small siliceous spicules in 

 the central lines. 



