BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 5. N:O 8. 9 
Hab. Mangroove Swamps, Elephant Point, East Indies. 
Coll. by Kurz. 
I have seen two entire frustules. In one of them the 
two median lines are parallel, and this will indicate an affi- 
nity to the Cymbelle, but in the other frustule the two median 
lines are curved in opposite directions. This is a very puzz- 
ling fact, the valves of both frustules having no essential dif- 
ference.» 
52. Pleurosigma formosum W. Sm. Virgin Ids. very common. 
53. Pl. delicatulum W. Sam. St. Bartholomew. 
54. Pl. intermedium W. Su. St. Bartholomew. 
55. Pl. strigosum W. Sm. St. Bartholomew. 
56. Pl. estuarii (BrRÉB) W. Sm. St. Bartholomew. 
57. Pl. balticuam (EHB.) W. Sa. Virgin Ids., St. Bartholomew. 
58. Donkinia carinata (DOonK.) Rarrs. Virgin Ids. rare. 
59. Rhoicosigma Reichardtii Grus. (Micer. Journ. 1877 pag. 
SPRIT SrRIS LI NVigm Tdst tare. 
60. Eh. compactum (GREV.) GRUS. Virgin Ids., St. Bartholo- 
mew; rare. | 
61. Rh. Antillarum Ci. N. Sp. Median line sigmoid, very 
elevated on the one half of the valve, where it forms a 
crest, impressed on the other half. Strix distinct, trans- 
Merser 4 Jöran 0501 min. MIL, 05 m.m. obior fd 
2080 — Virgin Ids. rare. 
62. dp hora busa GreEG. (A. ScHwm. Atl. Pl. 40 fig. 4—7. 
— Amhiprora maxima RAB. & JAN. Hond. pag. 3 PI. 2 
fig. 4. — Toxonidea insignis O. Wir. Mus. Godeff. H. 
1 pag. 10 PI. 8 fig. 9) Virgin Ids., St. Bartholomew; 
not rare. 
63. A. Clevei Grus. (A. ScHm. Atl. Pl. 25 fig. 46—48) Virgin 
Ids. only a single specimen. &L. 0,085 m.m. Br. 0,034 
TMA AStrie ÖKA ÖT MM 
64. AA. turgida GREG. (A. Scam. Atl. Pl. 25 fig. 31) Vir- 
gin Ids. 
65. A. exornata JANISCH (ÅA. ScHm. Atl. Pl. 39 fig. 26) Virgin 
Ids. rare. 
66. A. Porcellus Kitton (A. Scam. Atl. Pl 39 fig: 15—17) 
Virgin Ids. not rare. 
67. A. Cingulata Or. (A. ScHm. Atl. Pl 26 fig: 17). The fig. 
in ScHm. Atl. does not perfectly agree with the West 
Indian specimens. Strie are about 15 in 0,01 m. m. 
