70 
Hab.—Marine, scarce. In sandy gatherings from South Beach, 
Prince’s Bay and Clifton. (Fig. 2.) 
NAVICULA AMPHISBANA, Bory. 
Navicula amphisbena, Kiitz., Bacill., p. 9§, t- II, figs,. 41 and 42; Rabenh., 
Siissw. Diat-, p. 40, t. VI., fig. 66; Sm. Syn., vol. i., p. §1, pl. XVII., fig. 147; 
Ralfs., in Prit. Infus., p. 899, pl. VIL., fig. 72; Donkin, p. 36, pl. V., fig. 13; Van 
Heurck, pl. XL, fig. 7: 
LV. ventricosa, Ehr. 
Lrustulia depressa. Kiitz., p. 21, fig. 27. 
Valve elliptical, constricted into rounded apices; striz fine, 
oblique and shorter at the middle of the valve, producing a lan- 
ceolate, median blank space. 
fab.—Fresh water, frequent. In ponds, Clifton, Stapleton, 
New Dorp, New Brighton. (Fig. 3.) 
NAVICULA AFFINIS, Ehr. 
Navicula affinis, Rabenh., Siissw. Diat., p. 40, t. VI., fig. 58; Kiitz., Bacill., / 
p- 95, t. XXVIIL., fig. 65 and t. XXX., figs. 45 and 46 ; Ralfs in Prit. Infus., p. 902, 
pl. XIL., fig. 32 ;Sm., Syn., Vol. i., p. 50, pl. XVI., fig. 143; Van Heurck, p]. XII., 
figs. 4, 6. 
N. ampliata, Ehyen. 
NV. liber, var. 
Valve elliptical, slightly constricted toward the extremities ; 
stria transverse and reaching to the median line, shorter opposite 
the central nodule and crossed by a longitudinal line near to and 
parallel with the margin. 
Hab.—Fresh water; common. In ponds, Clifton, New Dorp, 
Huguenot, New Brighton. (Fig. 4.) 
NAVICULA INFLATA, Kiitz. 
Navicula inflata. Kiitz., Bavill., p. 99, t. TIT., fig. 36; Sm., Syn., Vol. i., p. 50, 
pl. XVIL., fig. 158 ; Rabenh., p. 191 ; Donkin, p- 21, pl. IEL., fig. 9 ; Ralfs in Prit., 
Infus., 1861, p. 899. 
Pinnularia inflata, Rabenh., Siissw. Diats., P- 44, t. V., fig. 10 c. 
Valve elliptical, with produced extremities; striaz oblique; 
frustule small. : 
Hab.—Fresh water. In ponds, Clifton. (Fig. 5.) Fossil in 
the San Fiore, Italy deposit. 
NAVICULA ASPERA, Ehr. 
Stauroptera aspera, Ehr., Rabenh., Sussw. Diat., p. 49, t. IX. fig. r., 
Frustulia fulva, Bréb. 
Stauroneis aspera, Kutz., Bacill. p. 106., t. XXIX., fig. 12.; Ralfs, in Prit- 
Infus., p. 914; Van H., pl. X., fig. 13. REGS. 
