88 LIVERPOOL MARINE BIOLOGY COMMITTEE REPORT. 



diate). The crust in the genus Geodia consists of globular 

 or ellipsoidal siliceous bodies closely packed together, upheld 

 by the short arms of the four rayed spicules. The species 

 of Stelletta have no globular siliceous bodies on the surface, 

 but have a thick dermal layer of cells charged with the 

 stellates of the species, whilst the surface of the genus 

 Tethya is hirsute with tufts of spicules projecting through 

 the dermal layer. 



L. F. M., No. 4. 9. 74, 2 (spirit). Collected at Holyhead. 



Stelletta gnibii, Schmidt. 



This species is described by Schmidt in his Atlantic 

 Sponges,* and has also been found by Mr. Carter at Budleigh 

 Salterton. 



L. F. M., No. 4. 9. 74, 6. Collected at Holyhead. 



Ecionema po7iderosa, Bk. 



This is no doubt the same sponge which Mr. Carter 

 described in 1871 as Stelletta aspera. It is undoubtedly a 

 species allied to Stelletta. t 



L. F. M., No. 4. 9. 74, 3. Collected at Holyhead. 



Family. — Pachastrellida. 



Dercitus niger, C. 



Hymeniacidon buoklandi, Bk. 

 Battersbyia bucklandi, Bk. 



Before issuing his third volume in 1874, Dr. Bowerbank 

 removed this sponge from his genus Hymeniacidon and 

 created a new genus for it, Battersbyia, and gave a section of 

 it in one of his illustrations. It had been, however, more 

 particularly described and figured by Mr. Carter in 1871 as 



* Spongf. Atlan., 1862, p. 46, pi. iv, fig. 2. 



^Mon. Brit. Spong., vol. ii, p. 56, and vol.iii, pi. viii, fig. 8-15 ; Annals 

 and Mag. Nat. Hist., 1871, vol. vii, p. 7, pi. iv, fig. 7, etc. 



