72 PLATE XXVIII. 



Fig. 7. The basal portion of one of the ovo-spinu- 

 late skeleton spicula. X 150 linear. 



Fig. 8. A view of the type-specimen of the sponge 

 of its natural size, the darkly-shaded portion repre- 

 senting the sponge. 



Since the description of this species in vol. ii, ' Mon. 

 Brit. Spongiado^,' p. 150, I found two more specimens 

 of this species among some small shells and fragments 

 of shells sent to me by my indefatigable friend Mr. C. 

 W. Peach, as the refuse of his Shetland dredging in 

 1866. The best of the two specimens coated a space 

 a little exceeding two lines in diameter, of the inner 

 surface of a valve of a Pectunculus not exceeding 5 

 lines in diameter. The portion of the specimen 

 mounted in Canada balsam agreed in its structure, in 

 every respect, with the type-specimen dredged by the 

 Rev. Mr. Norman at Guernsey. 



The second specimen was on a small flat fragment 

 of shell. The sponge did not exceed a line and a half 

 in diameter, and was evidently in an early stage of 

 development. Both specimens were of a light fawn 

 yellow colour in the dried state like the type one. 



