1886. | POSITION AND CLASSIFICATION OF SPONGES. 587 
2. Subfamilia Ectyonine, Ridley and Dendy. 
Fibre echinated by laterally projecting spicules. 
Myzilla, Schmidt ; Clathria, Schmidt; Rhaphidophlus, Eblers ; 
Plumohalichondria, Carter ; Acarnus, Gray ; Echinoclathria, Carter ; 
Clathrissa, Lendenfeld; Thalassodendron, Lendenfeld; Cerao- 
spina, Lendenfeld. 
5. Familia AXINELLIDs#, auct. 
With large subdermal cavities. Skeleton non-reticulate, consist- 
ing of ascending axes of fibre, from which arise subsidiary fibres 
radiating to the surface pervading the subdermal cavity. Fibres 
plumose. Megasclera chiefly styli, to which oxea and strongyla 
may be added. Microsclera rarely present, never chele. 
Dendropsis, Ridley and Dendy; Thrinacophora, Ridley; Hyme- 
niacidon, Bowerbank ; Phakellia, Bowerbank; Ciocalypta, Bower- 
bank ; Acanthella, Schmidt ; Awinella, Schmidt ; Raspailia, Nardo ; 
Spirophora, Lendenfeld. 
11. Suborder K ERATOSA, Bowerbank, emend. 
Silicea with a supporting skeleton composed of spongin; fibre 
with or without foreign bodies, but always without proper spicules. 
Flesh-spicules may be present. Exceptionally, there is no skeleton 
at all. 
i. Tribus Microcamere, Lendenfeld. 
With small spherical ciliated chambers and opaque ground- 
substance. 
1. Familia Sponeip2, F. E. Schulze. 
With narrow axial thread in the horny fibres, and without fila- 
ments. 
1. Subfamilia Aulenine, Lendenfeld. 
Reticulate sponges with vestibules, without flesh-spicules. 
Halme, Aphroditella, Halmopsis, and Aulena, Lendenfeld ; Psam- 
maclema, Marshall. 
2. Subfamilia Chalinopsilline, Lendenfeld. 
When dry of light yellow colour, digitate, lamellar, more or less 
flower-shaped, imitating very closely Chalinine, from which they 
appear only recently to have developed. Without flesh-spicules, 
with smooth surface. 
Chalinopsilla and Antheroplax, Lendenfeld ; Dactylia, Carter. 
3. Subfamilia Spongine, Lendenfeld. 
Massive, when dry dark brown, with conulated or granulated 
surface. Vestibules, when present, belong’exclusively to the inhalant 
system. Without flesh-spicules, 
Euspongia, Brown ; Cacospongia, Schmidt ; Hinpospongia, F. E. 
