Brown. — On a new Composite Plant. 



259 



Ankistrodesmus acutissimus. 

 falcatna. 

 sp. * 

 sp. * 



Scenedesmus acutus. 



,, var. dhnorphua. 

 obliquus. 

 obtusus. 



Fig. 



,, 9. 



I. 10. 



„ 11. 



„ 12. 



i. 13- 



„ 14. 



„ 15. 



,, 16. 



17. 

 18. 



19. 

 20. 

 21. 

 22. 



DESCRIPTION OF PLATES XXIV. AND XXV. 



Cosmarium ralfsii, var. ft. 



Cosmarium thwaitesii 



Cosmarium pusillum, dividing 



Cosmarium gemmiferum (a, front view x 350 : b, end view x 40U) 



Cosmarium obsoletum, var. punctatum (a, front view : b, end view) 



Cosmarium speeiosum, var. inflatum (a, front view : b, side view) 



Cosmarium cyclicum, var. ampliatum (a, front view : b, end view) 



Cosmarium tetraophthalmum, var. Q (a, conjugation with zygos- 

 pore : b, front view : c, end view) 



Cosmarium undulatum, var. R 



Cosmarium tenue (a, front view : b, end view) 



Staurastrum eustephanum, var. emarginatum (a, side view : 6, end 

 view) 



Staurastrum clepsydra (a, b, side view : c, d, e, f, end view : 

 g, zygospore ?) 



Staurastrum furcigerum (a, 5-rayed : b, 6-rayed) 



Closterium grimthii, two sizes 



Cosmarium crenatum, N.Z. form 



Micrasterias rotata, N.Z. forms (a, sharp teeth : b, truncate teeth : 

 c, end lobe x 350 : d, comparative sizes N.Z. and English 

 forms) 



Staurastrum gracile, N.Z. form 



Closterium acerosum (a, fronds with varying arms : b, the same 

 with zygospore) 



Closterium selenasum, effect of glycerine 



Scenedesums acutus 



Holocystis (Tetrachastrum) incisa, abnormal 



Docidium clavatum, abnormal 



X 



350. 



X 



700. 



X 



1.000. 



X 



350. 



X 



450. 



X 



350. 



X 



350. 



X 



700. 



X 



700. 



700. 



X 



400. 



X 



350. 



X 



400. 



X 



400. 



X 



200. 



X 



400. 



X 



90. 



X 



60. 



X 



400. 



X 



200. 



X 



90. 



Art. XXXII. — On a new Composite Plant. By Bobert Brown. 



Communicated by Professor Hutton. 

 [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 ^ to £ inch in length, sessile, linear-acute or sub- 

 spathulate, entire or bi- or tridentate, midrib pellucid ; under surface with 

 short stiff hairs ; upper or bract leaves linear-lanceolate, acute, small. 

 Flower heads yellow f 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 



