674 
ZOOLOGICAL LITEUATUlUi. 
we content ourselves here with the synoptical table of the orders 
and families :■ — 
I. Monosyca. 
Calcareous sponge 
one person with'' 
one mouth-open- 
ing. 
II. POLYSYCA. 
Calcareous sponge 
a stock with^j 
many mouth- 
openings. 
III. CCENOSYCA. 
Calcareous sponge 
a stock with one 
mouth-opening. 
IV. Clistosyca. 
Calcareous sponge j 
one person with- 
out a mouth- 
opening. J 
Stomach-wall 
solid, without cutaneous pores and 
without parietal canals 
with simple cutaneous pores .... 
with regular, radial parietal canals, 
with irregular, branched parietal 
canals 
with simple cutaneous pores (stock 
with developed persons) 
with simple cutaneous pores (stock 
with rudimentary persons) .... 
with regular, radial parietal canals, 
with irregular, branched parietal 
canals 
with simple, cutaneous pores .... 
with irregular, branched parietal 
canals 
with simple cutaneous pores .... 
with regular, radial parietal canals, 
with irregular, branched parietal 
canals 
V. CopnosYCA. 
Calcareous sponge 
a stock without 
mouth-opening. 
with simple cutaneous pores .... 
with regular, radial parietal canals, 
with irregular, branched parietal 
canals 
VI. Methosyca. 
Calcareous sponge 
a stock composed 
of persons and ^ 
stocks of various 
species and ge- 
nera. 
with simple cutaneous pores .... 
with regular, radial parietal canals. 
1. Pronycida. 
2. Olynlhida, 
3. Sycarida, 
4. Dyssycida. 
5. Soleniscida. 
C. Tarromida. 
7. Sycodendrida. 
8. Sycoihamnida. 
9. Nardopsida. 
10. Cwnostomida. 
11. Clistolynthida. 
12. Sycocydida. 
13. Lijwstoinida. 
14. Sycorrhizida. 
15. Sycophyllida. 
IG. Sycolcpida. 
17. Thccometrida. 
18. Sycometrida. 
Order I. Monosyca, II. 
Fam. 1. Prosy cida, II. Gen. Prosy cum, H. 
Fam. 2. Olynthida, H. Gen. Olynthus, H. j Olynthium, II. 
Fam. 3. Sycarida, H. Gen. Amphoridium, H. j Amphoriscus, II. j Sycanum] 
H. ; Syconella, 0. Sdt. ; Sicum, Risso j DunstervUlia, Bwbk. ; Artynas, 
Gray ; TJte, O. Sdt. ; Cyathiscus, II. 
Fam. 4. Dyssycida, II. Gen. Dyssyeum, H. j Dyssiconella, II. j Sycinula, 
0. Sdt. 
Order II. Polysyca, II. 
Fam. 6. Soleniscida, .ff. Gen^ XcMcaso/cwm, Bwbk. j Soleniscus, 11. 
