Nouvelles Archives du Muséiuu, 4^ Série. 



Mémoires T. VII, PL 20 



Phototypic Bertliaud, Pans 



POTAMONID^ (XVIII.) 



I. Tnchodactylus(Dilocarcinus) spinifer. 2. T. (D.) emarginatus. 3. T. (D.) orbicularis, vue dorsale. 



4. T. (D.) dentatus. j. T. (D.) argentinianus, vue ventrale. 6. T. (D.) argentinianus, vue dorsale. 7. V. (D.) gurupensis. 



8. T. (D.) orbicularis, vue ventrale. 9. T. (D.) Castelnaui Ô- lO- T. (D.) Castelnaui Q. 



Masson & Cie, Editeurs 



