BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 5. N:O 8& 11 
81. Synedra superba Körz. Virgin Ids. St. Bartholomew, 
not rare. 
82. S. fulgens W. Sm St. Bartholomew. 
83. S. Frauenfeldii Grus. (Verh. 1862 Pl. 4 fig. 26. Micr. 
Journ. 1877 pag. 167 P1. 193 fig. 11) Virgin Ids., frequent. 
84. S. undulata (Ban) GreG. Virgin Ids. very rare. 
85. S. Hennedyi GrzeG. Virgin Ids. rare. 
86. S&S. niteschioides Grus. (Verh. 1862 P1. 8 fig. 18) St. Bar- 
tholomew, rare. 
87. Doryophora amphiceros Körz. St. Bartholomew. 
88. Fragilaria pacificea Grus. (Verh. 1863 PI. 5 fig. 6) Virgin 
Ids. rare. 
89. Dimerogramma Surirella (EHB.) Grus. (Zygoceros Suri- 
rella EHB.?  Zyg. Sur. Boper Micr. Journ. II pag. 76 
Pl. 6 fig. 14. Raphoneis Rhombus Grus. Verh. 1862 
P1. 4 fig. 36) St. Bartholomew. 
90. D. ventricosum (RAB.) Grus. (Denticella ventricosa RAB 
SCA JANS Hond:, Bao: ror PRI SSI Viiom ds rare. 
The West Indian form has, as the form observed by 
GRUNOW, an area, which is broadest in the middle of the 
frustule. 
91. Surirella fastuosa EHB. This most variable species is of 
frequent occurrence in the West Indies. 
v. lepida A. Scuw. (S. lepida Atl. Pl. 4 fig. 4—5) Vir- 
gm Ids. 
v. cuneata O. W. (S. cuneata A. ScHm. Atl. Pl 4 fig. 1) 
Virgin Ids. rare. 
St: 
"92. 
v. recedens (S. recedens A. Scam. Atl. Pl. 14 fig. 2, 3, 4) 
Bartholomew, frequent. Scarcely distinct species. 
S. patens A. Scam. (Atl. Pl. 4 fig. 16—17 PI. 56 fig. 
10—11) Virgin Ids. rare. 
S. eximia Grev. (A. ScHm. Atl. PI 14 fig. 13 — pro- 
bably also S. mexicana Scem. Atl. Pl. 4 fig. 10—12) 
Virgin Ids. — several specimens. 
S. Gemma EuB. var. St. Bartholomew; only one spe- 
cimen. 
Campylodiscus limbatus BrÉz. (Diat. of Clyde pag. 504 Pl. 
nro IdsWrare: 
C. Thuretii BrRÉB. St. Bartholomew, a very small form. 
C. ambiguus Grev. (A. ScHm. Atl. Pl. 18 fig. 24—26 C. 
latus Shadb.) Virgin Ids. St. Bartholomew, rare. 
