70 BRITISH SPONGIADxE. 



a small sla.b of dark-coloured slate, two inches long 

 by one and a half inch wide, with twenty-two small, 

 very thin patches of a light grey-coloured sponge 

 scattered over the surface. The greater portion of 

 them were of a nearly circular form, varying in size 

 from one or two lines in diameter to the largest four 

 lines in diameter. On mounting portions of some of 

 the largest of them in Canada balsam they all proved 

 to be specimens of Hymedesmia tenuicula, agreeing in 

 all their structural characters with those of the type- 

 specimen. My friend Mr. Peach states the locality of 

 the specimens sent to me to be Wick, Scotland." 



12. HYMEDESMIA ZETLANDICA, Boiv., n, 152; m, PI. 

 XXIX, figs. 17. 



1867 Hymedesmia Zetlandica, Gray. Proc. Zool. Soc., p. 537. 



Genus 19. HYMENIACIPON, Boiv., i, 191 ; n, 154. 



1. HTMENIACIDON ALBESCENS (Johnston), n, 161; in, 

 PI. XXXI, figs. 610. 



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

 1S70 Amorphina albescens, Schmidt. Spong. Atlant. Geb., 

 p. 76. 



" On the 21st of September, 1874, I received from 

 my friend Mr. Higgin a specimen of Hymeniacidon 

 albescens from the shore near Holyhead for examina- 

 tion. It was found pendent on the under sides of 

 stones on the beach near low-water mark. It was, as 

 nearly as possible, of the same size as the one repre- 

 sented by fig. 9, Plate XXXI, from Torbay, audit agreed 



