CLASSIFICATION. 
Spong. 13 
Genus 5. Bathydorus , n. g., p. 49. 
Species i, B. jimbriatus , n. sp. ; ii, B. stellatus , n. sp. ; 
iii, B. spinosus, n. sp., p. 50 ; iv, B. baculiferus. 
Genus 6. Rhabdocalyptus, n. g., p. 51. 
Species i, R. mollis , n. sp. ; ii, R. rceperi, n. sp., p. 51. 
Genus 7. Grateromorpha , Gray, p. 52. 
Species i, C. meieri , Gray ; ii, C. thierfelderi , n. sp. ; 
iii, C. mnrrayi , n. sp. ; iv, C. tumida , n. sp. 
Genus 8. Aulochone, u. g., p. 54. 
Species i, A . cylindrical n . sp. ; ii, A . liliurn , n. sp. : p. 55. 
Genus 9. Caulocalyx, n. g., p. 55. 
Species i, G. tener , n. sp., p. 55. 
Genus 10. Aulocalyx, n. g., p. 56. 
Species i, A. irregularis , n. sp., p. 56. 
Tribe 2. Amphidiscopliora. F. E. S. Amphidiscs constantly 
present in the outer skin. In the parenchyma hexas- 
ters fail completely. A basal tuft of fibres, by 
which the Sponge is anchored in the mud, constantly 
present. The chambers no longer thimble-shaped 
and sharply separated from each other, but simply 
somewhat irregular evagi nations of the mombrana 
reticularis. 
Fam. 1. Hyalonematidce, F. E. S. Pentacte pinuli occur both 
in the dermnl and gastral membrane. 
Subfam. 1. Hyalonematince , F. E. S. The cylindrical, 
generally cup-shaped, body has on the upper 
side a more or less sharply margined roundish 
excurrent region — oscular area — and is only 
exceptionally laterally cleft. 
Genus 1. Ilyalonema, Gray sp., p. 57. 
Subgen. 1. Ilyalonema, s. str. 
Species i, H. sieboldii, Gray ; ii, H. gracile, n. sp. ; 
iii, H. diver gens, n. sp. ; iv, H. toxeres , 
Wy. Th. ; v, II. kentii, O. Sdt. ; vi, II. 
poculum , n.sp., p. 59; vii,//. conus , n.sp., p. 59, 
Subgen. 2. Stylocalyx , n. subg., p. 59. 
Species i, S. thomsonii , Marshl. ; ii, S. apertus , n, sp. ; 
iii, S. depressus, n. sp. ; iv, S. claviger, n, sp. ; 
v, S', globus , n. sp.; vi, S. elegans, n, sp.; 
vii, S. tener, n. sp. 
Species of Ilyalonema not referable to either of the 
preceding sub-genera: i, H. lusitanicum, 
Bocage ; ii, II. cebuense, Higgin ; iii, H. 
tenue, n. sp. ; iv, H. robustum , n. sp. 
Genus 2. Pheronema, Leidy, p. 63. 
Species i, P. annce, Leidy ; ii, P. carpenteri, Wy. Th. ; 
iii, P. grayi, Sav. Kent; i v, P. hemispherica, 
Gray ; v, P. globosum , n. sp. ; vi, P. gigan- 
teum , n. sp. 
