14 Spong. 
SPONGIJE. 
Genus 3. Poliopogon , Wy. Th., p. G6. 
Species i, P. amadou , Wy. Th. ; ii, P. gigas , n. sp. 
Subfam.4. Semper ellince, F. E. S. 
Genus 1. Semperella , Gray, p. G7. 
Species i. S. schnitzel , Semper. 
Subord. 2. Dictyonina , Zittel. Ilexactinellidce in which the larger 
parenchymal hexactes are from the first united to- 
gether into a composite rigid skeleton. 
Tribe 1. TJncinataria , F. E. S. With uncinates (the uncinate 
fails only ini Euryplegma auricularis \ 
Subtribe 1. Clavularia , F. E. S. Beside the pentacte hypo- 
dermalia and hypogastralia occur groups of radiately 
arranged clavulse. 
Fam. 1. Farreidce t Gray. The dictyonal skeleton forms in the 
youngest parts of the body a one-layered net with 
quadratic meshes, from the nodes of which on both 
sides proceed conical spines. 
Genus 1. Farrea , Bwk , p. 69. 
Species i, F. occa (Bwk.), Carter ; ii, F. sollasi , n. sp.. 
iii, F. vosmwri , n. sp. ; iv, F. clavigera , n. sp. 
Subtribo 3. Scopularia t F. E. S. Beside the pentacte 
hypodermalia and hypogastralia occur radially 
disposed scopulte (except in Euryplegma auricu - 
lore , in which not ouly uncinates but scopu- 
laria also quite fail). 
Fam. 2. Euretidce , F. E. S. Branched and anastomosing- 
tubes, which form either an irregular structure of 
nearly equal tube- width, or the walls of a cup. 
The dictyonal skeleton is, from the beginning, 
several-layered, so that a one-layered not is never 
met with at the ends of the tubes. 
Genus 1. Eurete (Semper), Crtr., p. 70. 
Species i, E. semperi, n. sp. ; ii, E. sclimidtii, n. sp. ; 
iii, E. farreopsis, Crtr. ; iv, E. car ter i, n. sp. ; 
v, E. marshalli, n. sp. ; vi ,E.bowerbankii, n.sp. 
Genus 2. Periphragella , Marshall, p. 72. 
Species i, P. elisce , Marshl. 
Genus 3. Lefroyella, Wy. Th., p. 73. 
Species i, L. decora , Wy. Th. 
Fam. 2. Melittionulce, Zittel Having the form of a branched 
tube, or a cup, with lateral blind sac-like evagina- 
tion. The dictyonal skeleton forms honeycomb- 
like, tolerably regular, six-sided, perforate wall-cells, 
in each of which a funnel-like extension of the mem- 
brana reticularis isset transversely across the lumen, 
while the outer ends on the outside are covered by 
• the investing dermal skin, and on the inside by the 
gastral membrane. Scopulie are absent from the 
gastral skeleton. 
