POLTZOA. 93 



Lyall's Bay. Australia. Auckland Islands. Red Sea. Bio de 

 Janeiro. 



* 24. B. dentata, Lamourouoc, Busk, I.e., p. 46. Cells bi-serial, 

 oblong, rounded at eacli end ; aperture oval ; three marginal spines on 

 the outer side, and one on the inner ; avicularia lateral, capitate ; 

 ovicell superior, cucullate, blue. Gray or blue. (Busk.) 



New Zealand (Hooker, Lyall). Australia. Tasmania. South 

 Africa. 



* 25. B. prismatica, Gray, I.e., ii.,p. 292. Polyzoarium reddish 

 brown with prismatic reflections ; cells two-rowed, elongate ; ovicell 

 globular, polished white. (Gray.) 



New Zealand (Dr. Sinclair). 



MUSCARIA, gen. nov. 



Cells multiserial, arranged back to back on both sides of the 

 branches. 



26. M. armata, sp. nov. Branches robust, flattened ; cells oval, 

 convex, arranged in longitudinal rows which are divided by elevated 

 ridges ; cells in the same series contiguous ; a long curved smooth 

 spine by the side of every alternate cell ; aperture small, transverse, 

 oval, the lower lip prominent. Avicularia (?). 



Polyzoarium about an inch in height, brown. "When viewed by 

 transmitted light, pale brown, with the lips of the aperture dark brown. 

 Motanau. On the roots of Boltenia pedunculata. 



FAMILY FLTTSTKIDJE. 



Polyzoarium flexible, expanded, foliaceous, erect, sometimes decum- 

 bent and loosely attached ; cells multiserial, quincuncial or irregular. 



FLUSTEA. 



Cells contiguous, on both sides of the frond. 

 Europe. Australia. Society Islands. 



27. P. papyracea, Ellis ; Busk, I.e., p. 48. Cells oblong, slightly 

 enlarged upwards, a short marginal spine at each upper angle ; avicu- 

 laria fusiform, situated on the right or left marginal spine. Olivaceous, 

 in places pinkish. 



Lyall's Bay. Britain. 



CAKBASEA. 



Cells continuous, on one side only of the frond. 

 Britain. South Africa. Australia. South America. 



28. C. piscifbrmis, Busk, I.e., p. 50. Cells (viewed behind) 

 elongated, truncated at both ends, contracted at the waist ; in front 

 pyriform, much expanded in the middle, contracted at the top and 

 tapering downwards, slightly expanding again at the end; aperture 

 large, occupying most of the front of the cell; ovicells immersed, 

 marked with radiating lines. 



New Zealand. Cook Strait. Tasmania. Australia. 



