CLASSIFICATION. Spong. 15 
Geuus 1. Aphrocallistcs , Gray, p. 74. 
Speciesi, A. bocagei, Perc. Wright; ii, A. beatrix , Gray; 
iii, *4. vastus, n. sp. ; iv, A. ramosus, n. sp. 
Fam. 3. Goschioporidce, Zittel The plate-like wall of the cup-, 
bowl-, or table-shaped attached body, is trans- 
versely perforated by more or less longitudinally- 
disposed, funnel-shaped, straight canals, which 
open alternately on the one and the other side of the 
wall, beneath the sieve-like investing membrane ; 
at the opposite end terminating blindly ; thus their 
length corresponds with the thickness of the wall. 
Genus 1. Chanelasma, u. g., p. 76. 
Species i, C. lamella , n. sp. ; ii, Q. hamatum , n. sp ; 
iii, 0. doederleinii , n. sp. ; iv, C. calyx , n. sp. 
Fam. 4. Tretodictyidcc , F. E. S. With irregularly arranged 
ex- and in-current canals, which penetrate the body- 
wall, and particularly the more or less dense dicty- 
onal skelclon, not transversely, but obliquely, or 
longitudinally, or in an undulating course. 
Genus 1. Trctod ictyum, n. g., p. 78. 
Species i, T. tubulosum, n. sp. ; ii, T. latum , n. sp. ; 
iii, T. cyathus , n. sp. 
Genus 2. Euryplegma, n. g., p. 80. 
Species i, E. auricular e, n. sp. 
Genus 3. Cyrtaulon ( Volvulina , 0. Sdt.)., p. 81. 
Species i, C. sigsbeei, 0. Sdt. ; ii, C. solutus , n. sp. 
Geuus 4. Fieldingia , Sav. Kent, p. 82. 
Species i, F. lagettoides, Sav. Kent. 
Genus 5. Sclerotbamnus , W. Marshall, p. 83. 
Species i, S. clausii, Marshl. 
Tribe 2. Inermia, F.E.S. Dictyonina withontuncinatesorscopuhe. 
Fam. 1. Meandrospongidce, Zittel. The body consists of a 
system of labyrinthine, auastomosing tubes of 
fairly uniform calibre, with a composite system of 
interspaces remaining between. Through the latter 
the water gains access to the interior, traverses the 
tube wall, and finds its way out either through the 
gastral cavity, or at once to the exterior. 
Geuus 1. Dactylocalyx , Stutchbury, p. 84. 
Species i, I), pumiceu * , Stutclib. : ii, D. subylobosus, 
Gray ; iii, D. patella, n. sp. 
Genus 2. Scleroplegma, 0. Sdt., p. 86. 
Species i, S. conicum, O. Sdt. 
Genus 3. Margaritella, 0. Sdt., p. 86 
Species i, M. civloptychoides, O. Sdt. 
Genus 4. Myliusia, Gray, p. 87. 
Species i, M. callocyathus , Gray. 
Genus 5. Aulocystis, n. g., p. 87. 
Species i, A. grayi , Bwk. sp. ; ii, A. zitteli, Marshl. up. 
