PLATE XI. 29 



sented by fig. 16, the specimens having apparently 

 suffered by attrition from other bodies ; in this respect 

 they coincided with the sponge represented by fig. 14. 

 In every other structural character they agreed with 

 the type-specimens. These specimens were dredged 

 at the Hebrides by Mr. J. Gr. Jeffreys, and were pre- 

 served for me by my indefatigable friend Mr. Peach in 

 1866. On the box containing them is written " Taken 

 out of sand." This note may probably account for 

 the destruction of the radiating fasciculi of their 

 surfaces. 



