THORNELY— MARINE POLYZOA OF THE INDIAN OCEAN 157 



116. Lichenopora holdsworthii (Busk). 



Discoporella holdsworthii, Busk, Brit. Mus. Cat., pt. iii, p. 33. 



There are more zocBcia in some of the series than Busk mentions, some of the series 

 have as many as 12, but others are shorter, either curtailed at the outside or the inside of 

 the series. Some colonies are much less regular than others. There are two rows of pores 

 between the series, of the same size as those on the central area, which is about the size of 

 the zooecial orifice. The margins of the zooecia are much broken, but appear to be elliptical, 

 raised most at the back. 



Cargados, 20 — 28 fath. ; Saya de Malha. 



117. Cylindroecium giganteum (Busk). 



Farella gigantea. Busk, Quart. Journ. Micr. Sc, iv, 1856, p. 93 ; Hincks, Brit. 

 Mar. Pol., p. 535. 



Cargados ; Farquhar, reef. 



118. Farella atlantica, Busk, Report Challenger Exp., xvii, pt. i, p. 37. 

 Amirante, 35 fath. ; Providence, 50 — 78 fath.; growing on hydroids. 



EXPLANATION OF PLATE 8. 



Fig. 1. Bugida neritina, var. rubra, n. 



Fig. 2. Bugula neritina, var. tenuata, n. 



Fig. 3. Bugula neritina, var. raiaosa, n. 



Fig. 4. Micropora houchardii (Aud.). 



Fig. 5. Membraniporella magnifica, n. sp. 



Fig. 6. Cribrilina reticulata, n. sp. 



Fig. 7. Bifaxaria vagans, n. sp. 



Fig. 8. MicrojMrella malusii (Aud.). 



Fig. 9. Lepralia crassa, n. sp. 



Fig. 9a. „ „ Dorsal view. 



Fig. 10. Lepralia marginata, n. sp. 



Fig. 11. Lepralia bicornis, n. sp. 



Fig. 12. Smittia glomerata, u. sp. 



Fig. 13. Smittiit, ornata, n. sp. 



Fig. 14. Smittia murarmata, Kirkpatrick. 



Fig. 15. Phylactella galeata, n. sp. 



Fig. If). Mucronella ellerii, var. multi-amculariata, n. 



Fig. 17. Cellepora vagans. Busk. 



Fig. 18. Crista conferta, Busk. 



