252 
robusta Ralfs, in Pritch. Infus., p. 763, 1861. 
var. tetraodon (Ehr.) V. Heurck, Atlas, Pl. 33, f. 11, 1880. 
prerupta Ehr., Amer., p. 126, 1843. ; 
var. bidens (Ehr.) Grun., in V. Heurck, Atlas, Pl. 34, f. 20, 1880. 
diodon Ehr., Infus., p. 192, Pl. 21, f. 23, 1888. 
depressa Ehr., in Kiitz., Bacill., Pl. 30, betw. £. 1 and 2, 1844. 
formica v. Richmondie Playf., Biol. Richm. R., p. 118, Pl. 4, f. 31, 32, 
1914. ¥ 
Desmogonium Ehr., 1848. 
Rabenhorstianum Grrn., D. Insel Banka, p. 6, Pl. 1, £. 1, 1865. 
Family ACHNANTHACEZ. 
Achnanthes Bory, 1822. (Achnanthidium Kiitz., 1844.) 
subsessilis Ehr., Infus., p. 228, Pl. 20, f. 3, 1838. 
microcephala Kiitz., Bacill., p. 75, Pl. 3, f. 18, 19, 1844. 
linearis W. Sm., Brit. Diat., ii, p. 31, Pl. 61, f. 381, 1853. 
lanceolata Bréb., in Kiitz., Spec. Alg., p. 54, 1849. 
var. dubia Von Heurck, Atlas, Pl. 27, f. 12, 13, 1880. ; 
calcar var. australis Playf., Biol. Richm. R., p. 116, Pl. 4, f. 25, 26, 1914. 
var. pulcherrima Playf., abid., p. 116, Pl. 4, f. 27, 1914. 
Woodlawnensis Playf., Frw. Alg. Lismore, p. 347, Pl. 45, f. 24, 1915. 
exigua Grun., Arct. Diat., p. 21, 1880. 
Family COCCONEIDACEA. 
Cocconeis Bhr., 1835. (Orthoneis Grun., 1868.) 
placentula Ehr., Amer., Pl. 1, f. i, 10, 24, 1843. 
var. lineata (Ehr.) Cleve, Cleve, Synopsis, ii, p. 169, 1895. 
var. cuglypta (Ehr.) Cleve, ibid. 
var, australica Pleyf., Biol. Richmond R., p. 117, Pl. 4, f. 29, 1914. 
Family NAVICULACEZ. 
Navicula Bory, Dict. Class., xi, p. 472, 1822. 
(Schizonema Ag., 1824; Colletonema Bréb., 1844; Diadesmis Kiitz., 
1844.) 
lanceolata (Ag. 1827) Kiitz., Dec., No. 72, 1833. 
var. curta Van Heurck, Atlas, Pl. 8, f. 18*, 1880-4. 
var. arenaria (Donkin) V. Heurck, Synopsis, p. 83, PI. 8, f. 18, 1880-4. 
_ (Nay. arenaria Donkin, Micr. Journ., i, p. 10, Pl. 1, f. 9, 1861.) 
viridula Kiitz., Bacill. Pl. 30, f. 47, 1844. 
peregrina v. minusculus Schum., Preuss. Diat., Nachtr. ii, p. 56, Pl. 2, 
f. 33, 1867. 
mutica Kiitz., Bacill., p. 93, Pl. 3, f. 32, 1844. 
var. Géppertiana Bleisch, in Rabh., Alg. Eur., No. 1183, 1861. 
var. rhomboidea Playf., Biol. Richm. R., p. 112, Pl. 4, f. 7, 1914. 
var. ovalis Playf., ibid., Pl. 4, f. 8, 1914. 
var. subhexagona Playf., ibid., Pl. 4, f. 9, 1914. 
var. subcircularis Playf., ibid., Pl. 4, f. 10-12, 1914. 
bacillum Ehr., Amer., V1. 4, f. v, 8, 1843. 
cryptocephala Kiitz., Bacill., Pl. 3, f. 26, 1844. 
