HYMENIACIDON. 81 



They vary to some extent in diameter and length. 

 One of the largest measured -^ inch in length, and one 

 of the smallest yis" inch in length, but by far the 

 greater portion of them are of intermediate lengths. 



"I have named this interesting species after my friend 

 Mr. Hillier, of Ramsgate, an ardent and successful 

 student of the British sponges and other branches of 

 marine natural history, to whom I am indebted for 

 my knowledge of the species and for other similar 

 interesting specimens." 



20. HYMENIACIDON CAEUNCULA, Bow. t n, 166; in, PL 

 XXXII, figs. 14. 



1867 Beniera caruncula, Gray. Proc. Zool. Soc. p. 518. 

 1870 Amorphina caruncula, Schmidt. Spong. Atlant. Geb., 

 p. 76. 



Habitat. On rocks between tide-marks, Westport 

 Bay, 1874. This is one of the regular tide-mark 

 sponges of our southern and western coasts (N.). 



21. HYMENIACIDON SANGUINEUS (Grant], n, 168; in, 

 81, PI. XXXII, figs. 58. 



1867 Eeniera sanguinea, Gray. Proc. Zool. Soc., p. 518. 

 1867 Amorphina sanguinea, Schmidt. Spong. Atlant. Geb., 

 p. 76. 



Habitat. On rocks, low water, Westport Bay. This 

 is another littoral species, very generally diffused, 

 though apparently more common in the south (N.). 



" Among some specimens of sponges collected in 

 the Guliot Caves at Sark by Mr. Hughes, of Birming- 



VOL. iv. 6 



