59 



of the colony." In some species, Fl. denticulata (PI. I, fig. 9 c), Fl. florea and partly 

 in Fl. flustroides (PI. I, fig. 4 b) the ooecia are situated inside the avicularia. 

 With exception of the Farciminaria species (PI. I, figs. 10 a— 10 d), in which the 

 ooecium is enclosed in a kenozocecium, the ocecia in the other members of the 

 family F'arciminariidae seem to have essentially the same structure as in the 

 Flmtridae, but all of them project more or less on the surface of the colony. In 

 the species of the genus Columimria n. g. (PI. I, figs. 12 a— 12 d; PI. XXIV, fig. 9), 

 a part of the inner (basal) wall of the ooecium is on each side covered by a 

 triangular cryptocyst-plate, which from each of the lateral borders of the zocecium 

 pushes itself in between the ectoooecium and the endoooecium and in Nellia 

 simplex var (PI. XXII, fig. 6 a) the frontal wall of the ooecium is provided with 

 a cryptocystic belt, like that found in many Flmtridae. I must also refer to this 

 group the ocecia in Micropora Normani (PI. VIII, figs. 3 a, 3 b), Micr. perforata 

 (PI. VIII, fig. 4), Rosselia Rosseli, Bugalopsis Peachii, Bug. cuspidata, Menipea cervi- 

 cornis (PI. II, fig. 4 b), M. Buski (PI. II, fig. 3 c), Urceolipora nana (PI. XV, figs, 

 la— Ic, PI. XXIV, fig. 11), Cheilopora sincera (PI. XXIV, fig. 4a), Gephyrophora 

 polymorpha, the ocecia in the species of the genus Onychocella (PI. XXII, figs. 3 a— 3 b, 

 PI. XXIV, fig. 10), in all members of the family Sclerodomidae (PI. XIX, figs. 

 18 a, 18 b), as also in numerous members of the family Catenariidae, for in- 

 stance in Hincksiella piilchella (PI. XII, fig. 9 a), the species of the genus Ptero- 

 cella (PL XII, figs. 5a, 6 a), most of the Catenaria species, (PI. XIII, figs. 2 a, 3 a, 3b) etc. 

 In the majority of the mentioned forms the ooecium projects more or less notice- 

 ably on the surface of the respective zocecium, and it is only in a small number 

 of cases, e. g. in Urceolipora nana and in the mentioned species of the Catenariidae, 

 that it is quite hidden within this. While in a number of cases we only have to do 

 with a membranous ectoooecium, as in Micropora perforata, Bugalopsis Peachi, 

 Cheilopora sincera, etc., the ectoooecium in others is whollj^ or partially calcified, 

 e. g. in the mentioned Catenariidae, in Bugalopsis cuspidata and Menipea cervi- 

 cornis. Finally, in both cases there may appear between the endoooecium and 

 the ectoooecium a more or less developed cryptocyst, as in Bug. cuspidata, 

 Menipea cervicornis and Gephyrophora polymorpha ', in the last of which the crypto- 

 cyst covers the whole frontal wall of the endoooecium. The cryptocyst in Urceoli- 

 pora nana on the other hand has quite a different position, as it here covers the 

 basal wall of the ooecium right down to the place where the ooecium issues from 

 the short horizontal portion of the distal wall. 



b) Endozooecial ocecia, which are surrounded by kenozooecia or heterozocecia. 



'110, PI. II, fig. 22. 



