2423 Porifera. 
which is sunk in the mud. The radical filaments barbed near the end, 
and with a cup-shaped anchor at the tip.‘ Das Genus ist von Marshall 
aufrecht gehalten. 
*3. Eureta(e) Demper. 
Fam. Macandrewiadae. 
*]. Macandrewia.*) ‚Ihe coral expanded, eyathiform; the upper and 
lower surface smooth, the upper surface with small oscules; fibres of 
skeleton small, with stellate spieules on the dermal surface. The stellate 
spieules three-rayed; the rays forked and reforked.“ 
*2. Theonella.”*) „Sponge cup-shaped, thick, covered with a smooth 
rather coriaceous external coat; internally formed of netted spieules, 
arranged so as to leave an hexangular mass; the spicules sub-eylindrical 
united at the inosculation of the network by a siliceous callosity; the 
body of the spieules generally smooth, but sometimes slightly spieulate 
on the surface, with numerous very slender fusiform spieules of very 
different sizes mixed in the sarcode. The parietes of the cup are pierced 
with many eylindrical tubes opening on the edge of the cup; but there 
is no appearance of any spines or oscules on the edge or surface of the 
dry specimen. The spieules form a coral-like network, very like Macan- 
drewia. Their intersections are rough and tubereular, like the knots of 
a net, but more rugose; the spieules themselves are generally smooth; 
but some of them are more or less spinulose, with short acute tubereles. 
The fusiform spieules in the sarcode are abundant, very slender, slightly 
tapering and acute at each end; they vary greatly in length, but are 
always slender and smooth; they are generally straight, but some few 
are curved like a nearly expanded bow.“ 
‚. Fam. Farreadae. 
=], Farrea BwKk. 
*2. Sympagella ©. 8. 
Fam. Dactylocalycidae. 
*1, Dactylocalyx Stutehb. | 
*2, Myliusia.***) „The sponge conical, eup-shaped, pierced with 
numerous short truncated tubes, forming raised folded anastomosing 
lamina on the lower surface.“ Ist von Zittel beibehalten. 
*23. Kaliapsis Bwk. 
*4. Discodermia Boe. 
Fam. Aphrocallistidae. 
*1. Aphrocallistes.}) „Sponge tubular, closed with a lid, with smaller 
") Gray in Proc. Zool. Soc. 1859, p. 438; auch in Ann. and Mag. Vol. V, 1860, 
p. 495. Die verkürzte Diagnose nach Gray Proc. 1867, p. 506. — **) Proc. Zool. Soc. 1868, 
p. 565. — ***) Proc. Zool. Soc. 1859, p. 439. Die verkürzte Diagnose nach Gray, Proc. 
1867, p. 506. — f) Proc. Zool. Soc. 1858, p. 114. Später (Proc. 1867, p. 507) wird be- 
richtet, dass das Skelet nicht kalkig, sondern kieselig ist. 
