518 REPORT— 1885. 
9. Scrupocellaria pilosa, Aud., ‘Chal. Rep.’ pl. xi. fig. 7 
= Crisia pilosa, Savig., ‘Egypt.’ 
10. 3 securifera, Busk, ‘Chal. Rep.’ pl. xi. fig. 2. 
Mr. Hincks, in his various contributions, adds to the number of 
species which he describes or figures in the papers referred to. 
11. Scrupocellaria varians, Hincks, Polyzoa of Queen Char. Is., ‘ Ann. 
Mag. Nat. Hist.,’ Dec. 1882, pl. xix., figs. 1-10. 
12. =; brevisetis, Hincks, op. cit. No figure. Bears. 
some resemblance to S. scrupea. 
13. “3 obtecta, Haswell, Hincks, Contributions, &c. ‘ Ann. 
Mag. Nat. Hist.,’ March 1883, p. 193, pl. vi- 
fig. 1. 
14. ” cervicornis, Busk (op. cit. p.193. No. fig.). 
15. 9 diadema, Busk, ‘ Brit. Mus. Cat.,’ Hincks, ‘Ann. 
Mag. Nat. Hist.,’ May 1884. Polyzoa of India. 
In his ‘British Mus. Catalogue’ Mr. Busk gives the following 
additional species :— 
16. Scrupocellaria cyclostoma, Busk. 
; 3 ferox, Busk. 
18. - Delilei, Busk. 
a: “4 Maderensis, Busk. 
20. :. inermis, Busk. 
The radical fibres of the different species of Scrwpocellaria are a very 
interesting study, but more on account of their position and character 
than as means of distinguishing the difference between species by means 
of them alone. In S. scrwposa they are slender and smooth, and given off 
at the lower part of the zoarium. In S. scabra they are long and slender, 
and scattered over the whole of the zoarium. In 8. reptans the radical 
fibres are either simple and given off as anastomosing fibrils forming a 
netted disc, or toothed. Two forms are present in the different species. 
In one they are simply tubes, in another they are, as Mr. Hincks says, 
‘veritable grapnels.’ In this form ‘the fibre is covered for about two- 
thirds of its length with sharp, recurved, hook-like processes, and is con- 
verted into an admirable prehensile organ, which, when plunged into the 
soft sarcode of the sponge or other yielding substance, holds the polyzoon, 
like an anchor, to its place.’ Ellis noticed these hook-like processes, and _ 
Couch, in his ‘ Cornish Fauna,’ also noticed and recorded several pecu- 
harities in the modes of attachment to other polyzoa. These hooked 
fibres are not, however, found on recent species only. In some of the 
Carboniferous Fenestella, hooked spines, though considerably more robust 
than any which now exist, are prominent features in the zoarium, and in 
all probability their purposes were the same in the economy of the 
species. Mr, Busk and Mr. Hincks’s comments are well worth special 
study by the student. 
Genus 13. Canda, Lamouroux 
= Canda, Lamz., Blainv. (pars), D’Orb., and Busk, ‘ Brit. Mus. Cat.’ 
Scrupocellaria (pars), Hincks. 
