ZOOLOGICAL AND BOTANICAL ASSOCIATION. 89 



five to six spines round the upper and outer margin; the lower three, 

 large, curved, hollow, and pod-like, attached by a horny joint to the 

 thickened lip. Opercular spine expanded, branched, spreading down- 

 wards and outwards from the upper and inner lip of the cell-mouth. A 

 large sessile lateral avicularium opposite the centre of the cell- aperture. 

 Frequently an anterior sessile avicularium between the two cells of the 

 internode. Internodes distant, connecting horny tube extending from 

 the apex of a pair of cells, upwards and backwards, and slightly dilating 

 as it enters the lower cell of the succeeding pair by its anterior aspect. 



There is constantly on the front of the upper of the two cells rf ring- 

 like marking, usually filled up with a calcareous plate, but frequently 

 giving off a horny, tubular tendril. At a bifurcation of the ccencocium 

 a third cell is introduced into the primary internode between the two 

 secondary branches. Ovicell unknown. 



A delicate parasitical species, twining its long tendril-like branches 

 round zoophytes and red sea- weeds. 



Bass's Strait ; Dr. Harvey. Port Fairy ; Mr. Dawson. 



2. — 3f. crystallina {Gray). 

 Bass's Strait; abundant; Dr. Harvey. 



3. — M. Fuegenm (Busk). 

 A single specimen; Bass's Strait; Dr. Harvey. 



4 M. Buslcii, n. 8. Plate V., Fig. 1. 



Cells elongated, attenuated downwards, three in each internode. 

 Cell-mouth large, oval, oblique, the lower third filled up by a tubercu- 

 lated calcareous plate; upper lip prolonged, and fringed with from 

 four to five spines, attached to the lip by horny joints, and one of them, 

 usually the second from the outer edge, very long, curved, and pod- like. 

 There is often an additional spine on the upper and inner margin of the 

 cell-mouth. Operculum spine strong and olavate, stretching upwards 

 and outwards from the lower and inner lip of the cell-aperture. Con- 

 necting horny tube between the internodes double. Ovicell spherical, 

 with a richly granular surface, imbedded among the cells, on the cavities 

 of two of which it encroaches. 



Van Diemen's Land ; rather abundant, and in fine condition ; Dr. 

 Harvey. New Zealand ; abundant ; Dr. Joliffe. 



ZOOL. * BOT. SOC. PBOC VOL. I. w 



