The Structure of the Thallus of Neomeris 
dumetosa, Lamour. 
BY 
ARTHUR H. CHURCH, B.A., B.Sc., 
Jesus College , Oxford. 
With Plates XXI, XXII and XXIII. 
UR knowledge of the structure of the species belonging 
to the remarkable genus Neomeris is based on the 
account of the Madagascar species N. Kelleri given by 
Cramer \ who describes very fully the anatomy of the full- 
grown plant and figures some of the earlier stages from spirit- 
material. Whether or not Solms-Laubach 1 2 is correct in his 
statement that Cramer’s N. Kelleri is identical with his own 
N. annulata , Dickie, from Mauritius, it is generally agreed 
that N. dumetosa represents a distinct form ; and this species 
has not yet been fully investigated owing to lack of suitable 
material. The older figures of Sonder 3 and Agardh 4 are 
very incomplete, as also are Cramer’s, whose measurements 
are quoted in the specific description given in De Toni’s 
Sylloge Algarum, No. 1065. 
1 Ueber die verticillirten Siphoneen. Zurich, 1887. Ibid. Part II. Zurich, 1890. 
2 Ann. du Jard. Buitenzorg, Vol. xi. 
3 Die Algen des tropischen Australiens. Hamburg, 1871. 
4 Till Algernes Systematik. Lund, 1887. 
[Annals of Botany, Vol. IX. No. XXXVI. December, 1895.] 
