724 
Transactions of the Society. 
G. Nymannianum Gran. Hp. 
G. Hammeri Reinsch. H., Bt., Bo., Deepdale, Bassenthwaite 
Water, Stye Head Tarn. 
*C. Clepsydra Nordst. (Desm. Brasil., tab. iii. fig. 29. G. bicardia 
Reinsch.). 
Long. 21 /x; lat. 21 /a; lat. isthm. 4*5 /x; crass. 16 /x. 
Fig. 30. Bn. 
C. coarctatuh sp. n. Fig. 11. 
C. parvum, panllo longius quam latius, le viter constrictum, 
sinn subaperto et obtuso ; semicellulse obtrapezicm, marginibns 
lateralibus snbrectis, apice late truncatm ; a vertice visse ellip- 
ticse ; a latere visse subcircnlares, apice truncatae ; membrana 
laevis et snbincrassata ad apices. 
Long. 16 yu,; lat. ad bas. semicell. 12-12*5 /x; lat. ad 
apic. 13 *5-14 *4 /x; lat. isthm. 7 /x; crass. 8 /x. Bo. 
This seems at first sight very similar to G. contr actum Kirchn. 
var. cracoviense Racib. (Nonn. Desm. Polon., p. 28, t. 1, f. 10) bnt is 
much smaller and has more truncate ends, a relatively wider isthmus, 
and a different lateral view. 
G. Holmiense Lund. var. integrum Lund. H. 
Forma cellulis a latere visis pyramidatis et a vertice visis 
nec late ellipticis. 
Long. 52 /x ; lat. 30 /i; lat. isthm. 16 /x ; crass. 17*5 /x. 
Fig. 12. B. 
G. anceps Lund. Bn., R. 
G. granatum Breb. B., Bo., L., C., Hk., Esthwaite Water. 
G. trilobulatum Reinsch. Bn. 
Long. 23 /x; lat. 15*4 /x ; lat. isthm. 5 /x. 
G. tetragonum Nag. H. 
var. Lundellii Cooke. B. 
G. variolatum Lund. Hk., L. 
G. obsoletum (Hantzsch) Reinsch. Bn., Hk. 
The vertical view was somewhat pointed at each pole just as in 
Nordst. Alg. et Char. I., tom. xvi. fig. 96, and not as in Reinsch, 
Algenflora von Mitt. Frank., taf. ix. fig. 5d. 
G. cymatopleurum Nordst. Bn. 
* var. tyrolicum Nordst. in Wittr. et Nordst., Desm. et 
(Edog. in Tyrol, p. 30, tab. xii. fig. 5. Hk., not uncom- 
mon. 
G. pachydermum Lund. Bo., H., C. 
G. perforatum Lund. Bn. 
G. pijramidatum Breb. Frequent. 
G. pseudopyramidatum Lund. Frequent. 
*G. microsphinctum Nordst. in Wittr. et Nordst., l.c. p. 33, t. 
f. 9. 
Long. 39 /x ; lat. 26 /x; lat. isthm. 17*5 /x ; crass. 18 5 
fx. Fig. 32. Bo. 
