84 BiU'nsH SPONiJiADj:. 



27. Htmeniacidok eadiosus, JBoiv., iir, 187 ; PI. LXXII, 

 figs. 3, 4. 



28. Hymeniacidon medius. Bow., hi, 291 ; PI. LXXXV, 

 figs. 11—13. 



" Among the specimens of sponges received for 

 examination from the Rev. A. M. Norman, were two 

 specimens of this species. One from Westport Bay was 

 about two inches in diameter and five lines at greatest 

 thickness. The colour of this specimen was darker 

 than that of the type. The second specimen was from 

 Eoundstone Bay, Galway. Its form was eccentric, a 

 small mass from which two small lobes, each about 

 three lines in diameter, were projected in opposite 

 directions for nearly an inch in length. The colour of 

 this specimen was like that of the type. Both speci- 

 mens agreed in every respect with the structural pecu- 

 liarities of the type." 



29. Hymeniacidon Aldousii, Bow., hi, 347 ; PI. XOII, 

 figs. 9—11. 



30. Hymeniacidon viegulatus. Bow., n. sp., iv, PI. IV, 

 figs. 4, 5. 



1875 Hymeniacidon virgulatits, Bowerbank. Brit, Assoc. 

 Report, 1875 (1876), p. 199. 



" Sponge virgultose, slender. Surface smooth. Os- 

 cula simple, dispersed. Pores inconspicuous. Dermis 



