e 
Brown.—On a new Composite Plant. 259 
Ankistrodesmus acutissimus. Scenedesmus acutus. 
falcatus. » var. dimorphus, 
sp. * obliquus. 
6p: obtusus 
DESCRIPTION OF PLATES XXIV. AND XXV. 
Fig. 1. Cosmarium ralfsii, var. ir. f "n - sí x 850. 
» 2. Cosmarium thwaite x ~ 400. 
» 39. Cosmarium aiid, dividin , as ae x 1,000. 
» 4. Cosmarium gemmiferum (a, front view x 350: b, $ eni view x 400) 
» 5. Cosmarium obsoletum, var. punctatum (a, front view: b, end view) x: 850. 
» 6. Cosmarium speciosum, var. inflatum (a, front view: b, side view) x 4650. 
» 7. Cosmarium cyclicum, var. ampliatum (a, front view: b, end view) x 850. 
» 8. Cosmarium tetraophthalmum, v var. 3 (a, eonjugation with zygos- 
ore: b, front view: c, end view) .. S ; ; x 850. 
» 9. Cosmarium undulatum, var. A vs we v4 *- qUO. 
» 10. Cosmarium tenue (a, front view: b, wad ew) x- LOD} 
yas pasar m ss var. emsrginatum be ido view : hs and 
x 700. 
5 4, iaiki e "i b, dé view: c, E e, Sx “l view : 
g, zygospore ?) ee vs i x , 
» 13. Staurastrum furcigerum (a, 5- raged b, 6- raped) ur p es x 3650. 
» 14. Closterium griffithii, two sizes E ka s x 400. 
» 15. Cosmarium crenatum, N.Z. x 400. 
„ 16. Micrasterias rotata, N. Z. ‘aaa E. dbi arp alles b, cones jecti: : 
e, end lobe x 350: d, c sizes N.Z. and — 
forms) M ae x 200. 
» 17. Staurastrum Jii N.Z. form vt EN x 400. 
» 18. Closterium acerosum (a, fronds with "uiu arms: b, the same 
with zygospore s a ean x Mi 
» 19. Closterium seleneum, effect of slyerin x 60. 
;, 20. Scenedesums acutus x 400, 
» 21. Holocystis (Tetrachastrum) í incisa, dora. - x 200. 
» 22. Docidium clavatum, abnormal ; , x 99. 
Arr, XXXII.—On a new Composite Plant. By Rosert Brown. 
Communicated by Professor Hurron. 
[Read before the Philosophical Institute of Canterbury, 30th November, 1882.] 
Glossogyne (?) hennedyi, sp. nov. 
Plant a small excessively and irregularly branched under-shrub, from 6 to 
12 inches high. Stem short, terete; bark pale brown ; upper branches very 
slender, tetragonous, furrowed, bright green, hispid with stiff hairs. Leaves 
alternate, distant, from 1 to 4 inch in length, sessile, linear-acute or sub- 
spathulate, entire or eg or tridentate, midrib pellucid ; under surface with 
short stiff hairs; upper or bract leaves linear-lanceolate, acute, small. 
Flower heads Ega 2 inch in diameter, single, terminal on the end of a 
short peduncle; receptacle conical, chaffy. Involucre campanulate : bracts 
equal, in two rows, the outer linear, blunt, with a tuft of rigid hairs at the 
