BY W. M. BALE. 797 



PLATK XV. 



Fig. l.Sertularella imlivisa, Bale. Port Phillip. 

 Fig. 2. ,, Portland, Viet. 



Fig. 3. ,, solicMa, Bale. Port Phillip. 



Fig. 4. Bondi. 



Fig. 5-7. variabilis, n.sp. Port Jackson. 



Fig. 8. a variety with longer teeth. 



Fig, 9. ,, ,, a slender variety, with calycles nearly 



smooth, and directed to the front so as to show inside the aperture. 



(All magnified 40 diameters.) 



PLATE XVI. 



Fig. 1-2. Sertularetta divaricata, Busk, var. dubia, n. var. Bondi. 

 Fig. 3-4. ,, divaricata^ var. sub-dichotoma, n. var. Port Jackson. 



Fig. 5-6. ,, longitheca, n.sp. Port Denison. 



Fig. 7. ,, cylindrica, n.sp. Port Jackson. 



Fig. 8. ,, microgona, v. Lend. Port Phillip. (From one of 



Dr. von Lendenf eld's types) 



(All magnified 40 diameters). 



PLATE XVII. 



Fig. l~2.Synthecium orthoyonia, Busk. Port Jackson, 



Fig. 3. , , , , a specimen with calycles directed towards 



the front. 



Fig. 4. Synthecium orthogonia, gonotheca, narrower aspect. 

 Fig. 5. ,, ,, broader aspect. 



Fig. 6-9. Sertularia geniculata, n.sp. Port Jackson. 

 Fig. 10-11. gonothecse. 



(All magnified 40 diameters). 



PLATE XVIII. 



Fig. 1-2. Sertularia complexa, Clarke. Bondi. x 40. 

 Fig. 3-4. ,,, ,, gonothecse. x 40. 



Fig. 5. Thuiaria subarticidata, Coughtrey. New Zealand. x25. 



