190 Prodromus of a System of the Calcareous Sponges. 



132. *S. compressa, H. Norway. (The stock, in its most 

 highly developed form, bears united forms of eiglit 

 genera, namely : — 1, Si/carimn; 2,Arfi/nas', S, Si/- 

 cidium] 4, Astpu'um; 5, Sf/cocystis ] Q^Artynella) 

 7, SycophyUum ; 8, Artynoj^hylhnn.) 



Synoptical Table of the Families o/Calcispongitc, toith especial 

 reference to the conditions of individuality. 



I. Monosyca. 



Calcareous sponge one ^ 

 person with on« ' 

 mouth -opening. 



'' Stomach-wall 



solid, without cutaneoas pores 



and witliout parietal canals... 1. rro.it/rida. 



with simple cutaneous pores ... 2. Ob/nthida. 



with regular, radial parietal 



canals 3. St/carida. 



with irregular, branched parie- 

 tal canals 4. Dyssycida. 



II. Pol57syca. 



Calcareous sponge a 

 stock with many 

 mouth-openings. 



( 



III. Coenosyca. "j 



Calcareous sponge a v 



stock with one | 



mouth-oponing. / 



IT. Clistosyca, 

 Calcareous sponge one 

 person witliout a 

 mouth-opening. 



V. Cophosyca. [ 



Calcareous sponge a / 

 stock withoutmouth- . 

 opening. I 



VI. Metrosyca. ^ 

 Calcareous sponge a 



stock compo.sed of 

 persons and stocks 

 of various species 

 and genera. 



with simple cutaneous pores 

 (stock with developed per- 

 sons) 5. SoJeniscida. 



with simple cutaneous pores 

 (stock with rudimentary per- 

 sons) 6. Tarromida. 



with regular, radial parietal 



canals 7. Sycodendrida. 



with irregular, branched parietal 



canals 8. Sycothamnida. 



with simple, cutaneous pores ... 9. Nardopsida. 

 with irregular, branched parie- 



talcanals 10. Caenostoniida. 



with simple cutaneous pores ... 11. Clistolynthida. 

 with regular, radial parietal 



canals 12. Sycocystida. 



with irregular, branched parietal 



canals 13. Lipostomida. 



with simple cutaneous pores ... 14. Sycorrhizida. 

 with regular, radial parietal 



canals 15. Sycophyllida. 



with irregular, branched parietal 



canals 16. Sycolepida. 



with simple cutaneous pores ... 17. Thecometrida. 

 with regular, radial parietal 



canals .. 18. Sycometrida. 



Synoptical Table of the Families of Calcispongiae, toith especial 



reference to the conditions of canalization. 



I. Aporeuta. "j 



Stomach-wall solid, I q^^ person with one mouth-opon- 



without cutaneous r ;„„ 

 pores or parietal 



canals. ' 



ing 1. Prosycida. 



