PERAGALLO. — Diatomées de France. 
Planche CIV 
TRICERALIUM 
1, Villefranche : Tric. arcticum Br. 
2, Cannes : Tric. (arcticum var.) quinquelobatum Grev. 
3, 4. 5, Villefranche : Tric. (arcticum our.) formosum Grev. 
6, Baléares : Tric. repletum Grev. var. balearica Grun. 
7, Baléares : Tric. punctatum Br. 
8, Baléares : Tric. sculptum Br. var. 
9, Toulon :’ Tric. sculptum Br. 
