146 
gentially placed spicules . . as has been said above ‘his could 
fot be demonstrated here; bu. even if .his passus .s omu.ed .n 
.he diaenosis. .he genus will prove .o be very useful, a. leas. 
presen. — even if i. is .o be dissolved in .he fu.ure as bemg 
..n.,ur., 1 U..11 »» SW—« !>' ''S*«.« ' 
cidon wi.h well developed fibres. 
Spicules: (fig. 23) s.yli; .bey have nearly all J 
beginnings of .he .ylos.ylo.e shape; sligh.ly curved, ra.her even y 
.hick for .he grea.er par., .apering .hen .o a very fine pom.. Leng.h 
156—270 I.V, by a thickness of 5,5—8 ^i. 
As Hall man n (op. cit.) has pointed out, Stylotella ^gidaL . 
and Stylotella digitata Ldf. are iden.ical wi.h St. agmmata R _ 
Previously known from Por. Jackson, Eas. coas. of Aus.r . 
Genus Hymeniacidon Bwk. 
Hymeniacidon indistincta nov. sp. 
Masked Island. Carnley Harbour; beneath s.ones on .he shore by low- 
water. 3/XI1.1914. 
Irregularly lump-shaped; i. has eviden.ly had a broad basis; 
one side is damaged, devoid of dermal-membrane. as .f .he 
sponges here had been .orn off from a surface of a..achmen.. 
also several very damaged specimens of ex.remely irregular shape 
are a. hånd. Grea.es. ex.ension 45 mm; surface in p aces wi 
small irregularly mammiform processes; in o.her places even. 
Dermal-membrane ra.her .hin, pellucid, permi.iing .he ex.ens.ve 
subdermal-cavi.ies .o be seen; wi.h .weezers i. may eas. y be 
peeled off from .he underlying .issues, by which process i. wi , 
however, ra.her easily be broken, as i. is somewha. brL.le. Sur¬ 
face no. hispid. Here and .here some small opemngs of ca. one mm 
in diamerer; .hey may be oscula, bu. may also be made by fore.gn 
organisms. 1. seems as if .he os.ia are collec.ed in special areas: 
in some places .he surface looks jus. as if i. had been pncked 
all over wi.h a needle, while in .he grea.er par. of .he surface, 
such marks are no. seen, and i. does no. seem as if even.ually 
exis.ing os.ia are shu. up. Consis.ence ra.her .ough and elashc. 
Colour white gray to dirty gray; a few samples, preserve m or¬ 
maldehyd, are light reddish. 
