Zoology. 5 a CAIA 
With spherasters Geodide. 
d Without spherast ters i 
Flesh-spicules euaster and oxyaster Stellettida. 
{ Flesh-spicules spirastrella enei 
h-spicules spirula and si gmata Tetilhde. 
25. Withou Tethyopsyllida. 
The widened distal ends of the radial spicule-bundles divide the regular 
| subdermal cavities into ectochonze or vestibules at the entrance of 
4 the inhalent aunts Tethyide, 
| Between p bres ee of the radial spicule-bundles ecto- and ento- 
] chonæ PS 
E The inhale: ied ae kie ad n me the inhalent canals 
Oe Roomba spirastrelid fesh-sp Spirited 
éj» spi ul 
Without flesh or pia ha 
J With polyac K Sesh. sos Chondrillide. , 
pad Sd anes les Chondroside. 
} proper Pecos 3 in ae supporting skelet 3I 
Withont proper spicules in the supporting skele 
{ With uniformly dis distribated skeleton pe bem 2a not very large sub- 
Cavities...... 
The skeleton consists of a dense axial reticulation and isolated fibres ex- 
tending from this to the surface. Beneath these very extensive sub- 
Ainar ê ivin are situated 34 
With etn living in fresh water Spongillide,  , 
Without gemmulz,......... 3 
mhout flesh- spicules; fibres of the supporting apna Bin 
spine haphide 
i Flesh-s spic cules signiata o or t spiral, noc He terorhaphiar i 
i F lesh-spicu les chelæ æ; when lk p ia of supporting skeleto: i 
a es Ca Desmacidentde. 
3 Nochele Axinellide, 
Wi wae With small Spheiical chanaber rs and opaque ground-substa isuedows . 36 
ee Wi th large sac- “shaped chambers and } transparent ground-subsance. merere 39 
{wae ithout filaments in the ground-s 37 
7 th filaments in the ground-sul stanc : E Li 
{ Skeletal fibres with thin axial canal i Spongide. ae 
ii Stel fibres tubular, with hisk pith gah A 
8 ee tight thin axi al — 
with thin axial onal: reticulate pecbVaiecers ‘Senna ie. 
B. Sea f es tubular, ith thick pi ith; dendritic Aplysillidæ. 
eteeees Haliarcida, : 
the reader is TE to this journal (September, 1887) for 
ti Lendenfeld’ S grouping of the families embraced in the 
oing i 
w 
* 
si 
D hee 
Amphidis hi t style-shaped spicu 
| iis, a h a with an enc disk at each end. 
Cis ee or-s aped spicules a 
the other, rods pointed at one end and bearing a knob or disk 
nalia, dermal spicules, 
vieda member of the tetraxonia group of f spicules, with 
? Tan main hexact T con men to ae with, a 
cee 
