BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND. 90 N:O 8. d 
29. N. abrupta GREG. (A. ScHm. Atl. Pl. 3 fig. 2) Virgin Ids. 
30. N. californica Grev. var.? (N. polysticta ScHm. Atl. Pl. 
3 fig. 16, 27) St. Bartholomew. — The N. polysticta GREV. 
is a quite different form or N. Baileyana GRUN. 
31. N. carimfera GRUN. v. minor (A. ScHm. Atl. Pl. 2 fig. 2) 
St. Bartholomew. Only one specimen. 
32. N. triwndulata Grus. (Mier. Journ. 1877 Pl. 195 fig. 10) 
St. Bartholomew. Only one specimen. 
33. N. virginea Cn. N. Sp.? Virgin Ids. not rare. This form 
varies somewhat as to the outline, being often a litt- 
le constricted in the middle. Apices produced. Me- 
dian pores approximate. The striation is very fine, in 
balsamslides visible only in oblique light. The strize 
are parallel and not interrupted. This form seems to be 
closely allied to N. Janischiana RaABH. (Hond. pag. 10 
P1. 2 fig. 15) if not its variety. There are some points 
of discrepancy; the West Indian form being not so con- 
stricted in the middle and having more approximate me- 
dian pores. — Fig. 2. 2, 
SAN rceribeo Crn. (AA. Sem Atl; P1:6 fig: 10, 11,12) not 
P1. 2 fig. 17) Virgin Ids. not rare. Strie 7—8 in 0,01 
m.m. Length 0,062—0,068 m.m. Br. 0,034—0,026 
m.m. 
35. N. brasiltensis GRUS. (A. Scam. Atl. Pl. 6 fig. 23—25) 
Virgin Ids. common. St. Bartholomew, rare. 
36. N. (rectangulata GREG. var?) Begula Grus. & CL. N. Sp. 
S. V. rectangular, with parallel margins. Strie coarse, 
radiate, reaching to the median line, abbreviate in the 
middle, about 7 in 0,01 m.m. Median pores somewhat 
distant, median lines almost straight. 'The endpores have 
a somewhat curious appearance. &L: 0,0884 m.m. Br: 
0,0136 m.m. Fig. 3. 
Virgin Ids. rare. Mr. GrRuUNSow has found the same form 
in a gathering from Campeche Bay. 
at. N. eruciformis . DonK. (B. D. Pl. 10 fig. 4: A. ScHw. 
Nordseediat. Pl. 2 fig. 25) Virgin Ids, only one specimen. 
L. 0,085 m.m. B: '0,01538 m.m. Strie 9—10' in 0,01 
m.m. 
38. N. Powellii Lewis (N. Widowichii Grun. Verh. 1863 B. 
XIII Pl. 4 fig. 4) Virgin Ids. not rare. — L. 0,038 m.m. 
B. 0,017 m.m. Strie 8—9 in 0,01 m.m. 
