“Me 
DESMIDS FROM SINGAPORE. 159 
Long. 75-84 u ; lat. 11 p. 
This species differs from C. calosporum, Wittr., in its coloured 
membrane, in being somewhat thicker and less curved, as weli as 
in its blunter apices. 
` 12. C. LAGOENSE, Nordst. in Vidensk. Meddel. Kjob. (1869) 
p. 203. t. 2. £. 2. 
- Forma minus curvata. 
Lat. 20 p; apicibus 194 u inter se distantibus. 
18. C. suBrRUNCATUM, n. sp. (Pl. 8. fig. 4.) 
C. mediocre; cellulis diametro lOplo longioribus, leviter cur- 
vatis, gradatim attenuatis polos versus, polis levissime dilatatis et 
late truncatis, ventre distincte sed leviter concavo; membrana 
luteola, delicate striolata, striis visis 25. 
Long. 259 u; lat. 26 u; lat. apic. 13 p. 
This differs from C. truncatum, W. B. Turn. in Vet.-Akad. 
Handl. xxv. n. 5 (1893) p. 22, t. 22. f. 14, in its very regular 
curve, and in not being at all ventricose: the striolations are 
also more numerous, and the ends are slightly dilated on the 
dorsal side. 
14. C. Rarrsu, Bréb. (Ralfs, Brit. Desm. p. 174, t. 90. f. 2.) 
Var. HyBRIDUM, Rabenh. Krypt. Fl. Sachs. p. 174; Fl. Europ. 
Algar. iii. p. 135. 
Long. 306-345 u ; lat. 24-29 p ; lat. apic. 60-779 p. 
Forma masor. 
Long. 598 u ; lat. 44 p; lat. apie. 11:5 p. 
15. C. STRIOLATUM, Ehrenb. (Ralfs, Brit. Desm. p. 170, 
t. 29. f. 2.) 
"n rather small form; long. 184-196 pu; lat. 25 p; lat. apic. 
p. 
PLEUROTENIUM, Naeg. 
16. p. TRABECULA, Naeg. 
Long. 392-426 p; lat. bas. semicell. 30-32 p ; apic. 21-29 p. 
" TETMEMORUS, Ralfs. 
: T. LzvIs, Ralfs, Brit. Desm. p. 146, t. 24. f. 3. 
d 82-87 u ; lat. 18:5-22 u ; lat. apic. 14 u; lat. isthm. 1-7 
p. 
