ADDITIONS A LA SÉANCE DU 23 NOVEMBRE 1877 . 25 
Amphora costata W. Smith, Syn. ofBrit. Diat. I, p.20, pl. 30, fig. 253. 
Verdelet, Bréhat. — Abondant. 
— granuiata Greg., Diat. of Cl. p. 53, pl. 6, fig. 96. — Verdelet, 
Bréhat. 
— Tentricosa Greg., Diat. of. Cl. p. 39, pl. 4, fig. 68. — Bassin à 
Ilot, Sept-Iles, Verdelet, Bréhat. 
ttft. Frustules non étranglés au milieu, aux extrémités non proéminentes 
ni aiguës, nodules arrondis. 
Amphora peiiucida Greg., Diat. of Cl. p. 41, pl. 4, fig. 73.— Verdelet, 
Bréhat. 
— Greviiiiana Greg., Diat. ofCl. p. 50, pl. 5, fig. 89 ; Ad. Schmidt, 
Atlas der Diat. Heft 7, t. 25, fig. 41. — Tréguier, Bréhat. 
— — var. ? — Tréguier. 
— compiexa Greg., Diat. of Cl. p. 51, pl. 5, fig. 90. — Bréhat. 
— suicata Brébisson, Diat. de Cherb. p. 10, fig. 8. — Verdelet. 
— roimsia Greg., Diat. of Cl. p. 44, pl. 5, fig. 79 ; Ad. Schmidt, 
Atlas der Diat. Heft 7, t. 27, fig. 40. — Verdelet. 
— — var. ? — Verdelet. 
— Proteus Greg., Diat. of CL p. 46, pl. 5, fig. 81 ; Ad. Schmidt, 
Atlas der Diat. Heft 7, t. 27, fig. 2-6. — Sept-Iles, Verdelet, 
Bréhat. 
— afflnis Kützing, Bacillar., p. 107, t. 30, fig. 66. — Bassin à flot. 
— marina W. Sm., Ann. And Mag. of nat. Hist. 1857, XIX, p. 7, 
pl. 1, fig. 2 ; Ad. Schmidt, Atlas der Diat. Heft 7, t. 27, fig. 14. 
— Bassin à flot, Saint-Quay. 
— duhia Gr eg.yDiat. of Cl. p. 42, pl. 5, fig. 76.—Verdelet, Bréhat. 
— eiongata Greg., Diat. of Cl. p. 49, pl. 5, fig. 84.— Verdelet. 
— quadrata Greg., Diat. of Cl. p. 49, pl. 5, fig. 85. — Bréhat. 
— crassa Greg., Diat. of Cl. p. 52, pl. 6, fig. 94. — Tréguier. 
— — var. punctata Grünow, Ad. Schm., Atlas der Diat. Heft 7, 
t. 28, fig. 33. — Tréguier, Bréhat. 
— spectabiiis Greg., Diat. of Cl. p. 44, pl. 5, fig. 80; Ad. Schmidt, 
Atlas der Diat. Heft 10, t. 40, fig. 23. — Sept-Iles, Bréhat. 
— — var. minor Greg., Diat. of Cl. p. 44, pl. 5, fig. 80. — Sept- 
Iles. 
— exceisa Greg., Diat. of Cl. p. 40, pl. 5, fig. 86.— Verdelet, Bréhat. 
Genre VI. — EPITHEMIA de Brébisson, 1838. 
Epithemia constricta de Bréb., W. Sm. Syn. of Brit. Diat. I, p. 14, 
pl. 30, fig. 248. — Bassin à flot. 
— Westermanni Kütz., BaCÜl. p. 23, t. 30, fig. 4. 
— Muscuius Kütz., Bacill. p. 33, t. 30, fig. 6; W. Sm., Syn. of 
