12 CLEVE, DIATOMS FROM THE WEST INDIAN ARCHIPELAGO-. 
98. 
103. 
106. 
10) 
108. 
109. 
151007 
LE 
C. ecclesianus Grev. (C. Fenestratus GRrREv., C. Raben- 
horstianus JANISCH) Virgin Ids. St. Bartholomew, fre- 
quent. "This is a very variable species. One specimen 
from St. Bartholomew approaches very nearly to OC. bi- 
marginatus GREV. (A. ScHM. Atl. Pl. 16 fig. 7). 
« C. intermedius GRUS. (A. Scm. Atl. Pl. 18 fig: 9) Virgin 
Ids. rare. 
- Ci imGertus” As SoHM; (At PTS He 1955) varen 
Ids.. St. Bartholomew. 
« C: Hodgson W. Sa. (A. ScHu. Atl. P1 55 Hoj5)Nirgsm 
Ids. rare. 
. Podocystis adriatica Körz. (Pod. americana BAL.) Vir- 
gin Ids. 
. Plagiodiscus Martensianus Grus. (Micer. Journ. 1877 
Pl. 194 fig. 8) Virgin Ids. very rare — only one spe- 
cimen. 
. Niteschia Sigma (Körz.) W. Sm Virgin Ids., St. Bar- 
tholomew. 
N. (Sigma var.?) valida C1r. & Grus. Slender, almost 
straight, but also sometimes more or less sigmoid, with 
cuneate ends. Puncta about 4 in 0,01 m. m. Strig 
sharp; finely punctate, 18 in 0,01 m. m. Virgin Ids. 
very rare. GRUNOW has found the same form in a gathe- 
ring form Campeche Bay. L. 0,27—0,3 m.m. — Fig. 
440 
19. 22. TY 
N. angularis W. Sm. Virgin Ids. St. Bartholomew. 
N. socialis GreG. (N. fluminensis GRUS?) St. Bartho- 
lomew. 
N. plana W. Sm: St. Thomas. 
N. panduriformis GreG. (Diat. of Clyde pag. 529 PI. 14 
fig. 102) St. Bartholomew. not rare. 
N. lata O. Witz (Journal d.. Mus. Godeffr. H. 1 pag. 66 
P1: 8 fig. 6. TAGERSTEDA Bih: ts K3 Sv Mere kd 
Handl. III N:o 15 fig. 2 a) — Virgin Ids., St. Bartholo- 
mew. The West Indian form agrees exactly with Mr. 
LAGERSTEDT'S beautiful delineation. 
N. Jelineckii Grus. (Verh. 1863 Pl. 5 fig. 4 — N. For- 
mica Hantzsch. Ost. Arch. Diat. pag. 21 fig. 8. — N. 
decora KitToN Micr. Journ. 1873 pag. 206 Pl. 38 fig. 6) 
Virgin Ids. not rare. 
