•22 Bryozoafrom Chatham Island and d'UrvlUe Island. 



There seem to be usually 42 tentacles, though as many as 

 GO have been counted in a section ; but this probably arose 

 from some being folded inwards, and thus being twice cut 

 tlirongh. 



This seems to be nearest to the variety muscosa of P.prin- 

 ceps, Kraepelin, but I find it very difficnlt to see upon -what 

 satisfactory grounds P. princeps and P. pnUjmorphn, Kr., arc 

 separated.' Kraepelin, Braeni, and other authorities have 

 largely reduced the synonymy o£ the species, but Braera 

 considers that Kraepelin went too far in the reductions he 

 made. MacGillivray has described^ P. Aplini frotn Victoria, 

 Australia, but it is im|)0ssible to say whether that should be 

 considered as the pre>eiit variety of P. princeps. 

 Hub. Lake Iluro, Chatham Island. 



EXPLANATION OF PLATE L 



Fi(i. 1. Lopralia cUvoxn, sp. n., X 25. From Chatliam Inland, Jan. 1897. 



Ftg. 2. Ditto. Mandible, x 250. a x 85. 



Fiy. 3. Ditto. Section through tlie suboral avicularia.i chamber, 

 showing the avicidaiian glands. X 150. 



Fig. 4. Ditto. Section througli the oral gland. X 320. 



Fig. 6. Ditto. Growing end of two terminal zocecia, showing new 

 growth from each, which will be divided otl' by rosette- 

 plates. X 85. 



Hg. 6. Ditto. Crrowing end of terminal zocecia, showing growth from 

 three centres. X 85. 



Fig. 7. Ditto. Growing end with outgrowth, x 320. 



Fig. 8. Smittia m:tuiiganuie7isis, sp. n., X 25. From Maunganui, 

 Ciiatham I.<land. 



Fig. 9. Ditto. Mandible, x 250. 



Fig. 10. Ditto. Operculum, X 85. 



Fig. 11. Hiantopora monoceros (Busk), X 25. Growing end^, showing 

 the calcareous projections arising from the side, thus forming 

 pores. In the left-liand zocecium (fl) tiie lower calcareous 

 wall below the oral aperture is not complete. Above the 

 zocEcia (distally) the basal and lateral walls are found before 

 there is any other sign of growth, and in the division thus 

 formed above tlie right-hand zooecium the calcareous front 

 wall is commencing and has made a semicircular growth. 

 Between the zotecia a and b there was another, but this 

 has been omitted. The specimen figured is probably from 

 Australia. 



Fig. 12. Memhranipora hiayis, Hincks, X 25. From Red Bluff 

 Chatham I^iland. 



Fig. 13. A'lfea rectn, Hincks, X 250. Showing junction of ringed and 

 dotted portion of the oral tube. From French Pass, 

 D'Urville Island, New Zealand. 



• MacGillivray, P. II., " Description of a new Species of Plumnlella" 

 Trans. Koy. Soc. ^'ict. vol. v. pp. 203-204 (1860). 



