96 BRITISH SPONGIAD.E. 



4. HALICHONDRIA INCONSPICUA, Bow. t n, 236 ; ni, PI. 

 XLT, figs. 1214. 



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

 p. 77. 



5. HALICHONDRIA INCERTA, Bow., n, 237; in, PI. XLT, 



figs. 1517. 



6. HALICHONDRIA COALITA (Grant'), n, 238 ; in, PL XLI, 



figs. 1820. 



1870 Amorphina coalita, Schmidt. Spong. Atlant. Geb., p. 77. 



Habitat. A specimen in my cabinet was given me by 

 Dr. Jeffreys, who dredged it in the Roach River (N). 



7. HALICHONDRIA MUTULUS, Boie., in, 209, PI. LXXIV. 



figs. 48. 



1868 Halichondria mutulus, Bowerbank. Last Report. 

 Dredging Shetland Isles ; Norman on Porifera, Brit. 

 Assoc. Rep., p. 332. 



8. HALICHONDRIA CYLINDRACEA, Boiv., n. sp. PI. VI, 

 figs. 48. 



" Sponge massive, sessile, or coating thickly. Sur- 

 face smooth, uneven. Oscula simple, minute. Pores 

 inconspicuous. Dermal membrane pellucid, abun- 

 dantly spiculous ; spicula subcylindrical acerate, 

 equable in length, but variable in diameter, dispersed ; 

 retentive spicula bidentate, equi-anchorate, rather large, 

 few in number ; and rarely bihamate, small and very 



