86 BRITISH SPONGIAD2E. 



32. HYMENIACIDON VIRIDANS, Bow., n, 178; in, 85; 

 PI. XXXII, figs. 1922. 



1867 Reniera viridans, Gray. Proc. Zool. Soc., p. 518. 



Habitat. Found by Mr. Peach in Shetland in 1864 

 (fide Bowerbank in litt. ad A. M. N). 



33. HYMENIACIDON AITEEUS (Montagu}, u, 181; in, 88. 

 PI. XXXIV, figs. 79. 



1867 Reniera aurea, Gray. Proc. Zool. Soc., p. 518. 



1870 Amorphina aurea, Schmidt. Spong. Atlant. Geb., p. 76. 



Habitat. Between tide marks Toberniory, Isle of 

 Mull (N.). 



34. HYMENIACIDON AEMATUEUS, Bow., u, 183; m, PI. 

 XXXIV, figs. 1215. 



1867 Reniera armatura. Gray. Proc. Zool. Soc., p. 518. 



35. HYMENIACIDON CALLOSUS, Bow. n. sp., iv, PI. IV, 

 figs. 6 9. 



" Sponge massive, unattached. Surface coriaceous, 

 minutely hispid and slightly rugose. Oscula and pores 

 inconspicuous. Dennis slightly coriaceous ; abun- 

 dantly spiculous, spicula acuate, arranged in a dense 

 closely constructed network ; rete rough, stout, and 

 bristling with defensive spicula ; areas small and 

 irregular. Skeleton spicula acuate, numerous, rather 

 larger than those of the dermis. 



" Colour. In the dried state, light fawn-yellow. 



