20 P. T. CLEVE, DIATOMS FROM BAFFINS BAY AND DAVIS STRAIT. 
Navicula Hyalosira var. -I was unable to resolve the stria- 
tion, for which reason the identification is somewhat uncertain. 
Navicula kryokonites var. semiperfecta CL. differs in nothing 
from ÖESTRUP's Nav. semistriata (p. 438 P1. VI f. 66). 
Navicula Oestrupi CL. N. Sp. Linear, slightly biconstricted, 
obtuse. &L. 0,067; B. 0,007' mm. Median line central and 
straight; its terminal fissures turned in contrary directions. 
No axial or central area. Strie parallel, reaching to the 
median line, about 24 in 0,01 mm., somewhat wider in the 
middle of the valve, crossed near the margin by a fine longi- 
tudmals.lmnme RI IL0. 
This form is either nearly related or perhaps identical 
with >»Amplaiprora? amphoroides» ÖESTR. (p. 442 P1. VI f. 70), 
but I am unable to identify them as ÖESTRUP does not give 
the number of the strige. That ÖEsTRUP's form is acute and 
my obtuse is of no importance. As to the systematic place 
of this form I am uncertain. Were is not for the longitudi- 
nal lines I should be inclined to place it in the section Fusi- 
formes near N. parallelistriata PANT. | 
Navicula Pediculus CL. N. Sp. V: elliptical. &L. 0,012; 
B. 0,0065 mm. No areas. Striee 27 in 0,01 mm. parallel; 
slightly rädiate at the ends. — PI. TI, 14. 
This very small species resembles GRUNOW's N. debilis- 
sima, but the strie are very distinct. From N. muralis it 
differs by its marine habitat and parallel strice. 
Navicula solitaria CL. N. Sp. V. linear, with rounded ob- 
tuse ends. =&L. 0,03 to 0,04; B. 0,006 to 0,007 mm. - Median 
line central, straight, with approximate median pores and 
marginal terminal nodules. Strie 10 to 11 in 0,01 mm., 
parallel throughout, not distinetly punctate. No areas. — 
B1.sT796. 
This form occurred very sparingly in the Cape Eglinton 
material. Its nearest allies seem to be in the N: directa-group. 
Navicula vaga CL. V. lanceolate, with long and narrow, 
protracted ends. &L. 0j045; B: 0,0035 mm. Terminal nodules 
marginal. Structure could not be resolved. — P1. I, 16. 
This species is evidently nearly related to Nav. Lineola 
(FRUN. from which it differs by its gibbous centre. 
Navicula valida var. minuta OL. (Vega D. p.- 466). L.0,029; 
B. 0,015 mm. : Strie 9 in 0,01 mm. 
Exactly the same form as from Cape Wankarema. 
