On some New Species of Nitzschia. Bij A. Grunow. 395 



breadth, 0' 035-0 "049 mm. Samoa Islands, Nicobar Islands, 

 Ceylon, Northern and Eastern Australia, West Indies. PI. XII. 

 Fig. 2,^. 



N. Campechiana Grun. I. c. — This beautiful species bears some 

 resemblance to the former, but it is smaller, and is distinguished 

 by rows of short striae, which cross the longitudinal furrows. 

 Carinal puncta 3-4 in O'Ol mm.; transverse stria3 delicate, 

 moniliform, 22 in 0-01 mm. Length, 0-068-0 -087 mm.; 

 breadth, 0-022-0 "025. Campeche Bay. PL XIII. Fig. 16, a-6, 



OOP 



I ' 



Sectio Tryblionella. 



N. cocconeiformis Grun. I. c. — Valve elliptical, strias broad, 

 com|)Osed of rows of very minute puncta (forming transverse and 

 oblique lines, as on Pleurosir/ma angulatum, 26 in 0-01 mm.) 

 interrupted by a central, linear, lanceolate, blank space. Length, 

 - 022-U • 076 mm. ; breadth of valve, • 011-0 • 028 mm. PI. XII. 

 Fig. 5, a, h, ~-, Bengal, Gulf of Carpentaria, Zwatrop Kiver 

 in South Africa. 



N. perversa Grun. I. c. — Valves broad, elliptic, marked on one 

 side by a semicircular band of slightly radial striae (costfe) 10 11 

 in 0*01 mm., and on the other (upon the margin of which a small 

 central nodule is visible) by regular rows of small puncta. Length, 

 - 042-0 • 046 mm. ; breadth of valve, - 022-0 • 026 mm. Sierra 

 Leone, mouth of Rokelle Biver, Santos. PL XII. Fig. 6, ^^ 



N. gramdata Grun. I. e. — Small, valves elliptic, with a few 

 rows of large puncta (5-7 in 0*01 mm.). Length, 0' 020-0 -043 

 mm. ; breadth of valve, 0" 012-0 -02 mm. Samoa Islands, Santos, 

 New York, Savannah, in rice field.s, mud, etc. PL XII. Fig. 7, ^^^ 

 Allied to N. 2>unefata, but differing by its smaller size and much 

 larger puncta. 



N. limicola Grun. I.e. — Very small, valve broadly elliptic, 

 with shallow longitudinal furrows; transverse strijr, ll-Ki in 

 0-01 mm. Length, 016 mm.; breadth of valve, 0-008-0 -01 

 mm. Savannah, in rice fields, mud. PL XII. Fig. 10, ^-. 

 Allied to small forms of N. (Trijhlionella) Hantschii. 



Sectio Scalares. 



N. scaligera, Grun. I. c. — Allied to N. Grnndleri Grun., and 

 perhaps a small form of tliat species. Carinal costaj 3-4 in O'Ol 

 mm. ; transverse moniliform stria' 15 in O'Ol mm. Valves 0-108 

 mm. long, - 0105 mm. broad. Carapccho Bay, very rare. PL XI I. 

 Fig. 3, ""-". Smaller forms of N. Grnndleri occur in a gathering 

 from Florida, 0-145 mm. long, 021 broad, with 3-4 carinal 

 costx', and II mouilifurm atria ' iu 01 mm. The n^arcbt ally to 



2 I. 2 



