SPONGES FROM THE ABROLHOS ISLANDS. 479 
Family DESMACiDONiDiE. 
32. P seudoesperia carteri n. sp. 
33. P seudoesperia tricliophora n. sp. 
34. Esperella plumosa Carter. 
35. Bienina tubulata Dendy. 
36. Echinodlctyum hilamellatuin (Lamarck) Ridley. 
37. Anchinoe fictitioides n. sp. 
38. Dendoricella schmidti (Ridley) . 
Family CLAVULiDJi. 
39. Traehi/cladus Icevispirulifer Carter. 
40. Sigmosreptrella fibrosa Dendy. 
41. Spirastrella vagabunda Ridley. 
42. Aaptos aaptos Qichmidi) . 
43. Polymastia mammillaris (0. F. Miiller) Bowerbank. 
Order EUCEEATOSA. 
Family Darwinellid^. 
44. Megalopastes arenifibrosa n. sp. 
Family SpoNGELiiDiE. 
45. Sptongelia dahini n. sp. 
46. Psammopemma crassum Carter var. 
Family Spongiid^. 
47. Hippospongia intestinaiis (Lamarck). 
48. Coscinoderma pyriforme Lendenfeld var. a. 
48 a. Coscinoderma pyriforme Lendenfeld var. /3. 
As might be expected from the position of the Abrolhos Islands, the 
sponge fauna is mainly intermediate in character between that of the more 
westerly Indian Ocean and that of the more easterly Australian coasts, but it 
contains a small element apparently derived from the North, viz. Lelapia 
antiqua, nearly related to the Japanese L. nipponica ; Stelletta debilis, pre- 
viously known only from Ternate, and Ancotina brevidens, very closely related 
to Ancorina amboinensis from Amboina ; while JEchinodictyum bilamellatum, 
though widely sf»read on the eastern coasts of Australia, seems to be a 
. characteristically tropical or sub-tropical species. 
We have to record our indebtedness to Professor W. J. Dakin, D.Sc, for 
the opportunity of studying this valuable collection ; to Mr. M. Burton, M.Sc, 
for determining the two species of Donatia, a genus to which he has devoted 
special attention : to Mr. Charles Biddolph, the skilled assistant in the 
Zoological Department of King's College, for the photographic illustrations, 
and to Mr. J. G. Dendj' for help in section-cutting. 
