130 Mr. H. J. Carter’s Generic Characters of Sponges. 
uniformly foraminated and continuously spread over the sur- 
face, whose evenness is not disturbed by the usual polygonal 
projection of the subdermal fibre. Fibre fine, woolly.—Species 
Coscinoderma lanuginosum. 
Order V. ECHINONEMATA. 
Family 1. Echinated with proper spicules on the fibre. 
Genus Ectyon, Gray. 
Char. Sponge massive, reticulated, composed of cylindrical 
horny fibre, with single scattered or groups of diverging spi- 
cules. Spicules acuate, verticillately spined. (Hmended from 
Proc. Zool. Soc. 1867, p. 515.)—Species Hetyon sparsus, &e. 
Genus Eoryonopsis, Crtr. 
Char. Branched, with solid axis. Spicules with spines 
generally distributed, 7. e. not arranged in verticils. Spicules 
of the interior of the fibre cylindrical, obtusely ended; those 
on the exterior of the fibre acuate, in groups of two or more, 
echinating the surface.—Species Hetyonopsis ramosa. 
Family 2. Echinated with proper spicules projecting from 
the ¢nterior of the fibre. 
Genus Puycopsts, Crtr. 
Char. Fueus-like, branched. Stem hard, woody ; covered 
hirsutely with filamentous processes more or less expanded 
and divided at the free ends. Spicule acerate.—Species Phy- 
copsis hirsuta. 
Genus PTILOCAULIS, Crtr. 
Char. Long, cylindrical branches with solid axis, passing 
outwardly into more or less spatuliform processes, like the 
barbs of a feather, more or less divided at the free ends. 
Spicule acerate or subacuate.—Species Piclocaulis gracilis Ke. 
Genus LEucOPHL@US, Crtr. 
Char. Pyramidal, erect, in groups, or massive, or flabel- 
late. Surface snow-white when dry. Interior light amber- 
yellow. Surface incrusted by coalescent tufts of proper 
spicules. Spicule acerate or acuate.—Species Leucophleus 
massalis &c. ° 
