Algae incertre, sedis, Hydrodictyopsis. 71 



9. Halymenites undulatus IMass., Syllabus plantarum foss., p, 8 (nomen). ?8i 



«Saicedo» in agro Vicetino (Mass.). 



10. Halymenltes cailyblepharoities Mass., Syll. pl. foss., p. o (nomen). 2^2 



(( Salcedo » in agro Vicelino (Mass.). 



11. Halymenites crinitus Mass., Syll. pl. foss., p. 123 (nomen). 28.3 



« Salcedo » in agro Viceiino (Mass.). 



Gen. Hormoslra Endl., Gen. Plant. p. 10. 

 Frons ramosa, articulata, ramulis sterilibus angustis, fertilibus 

 moniliformibus. 



1. Hormosira moniliformis Heer, Vorw. Fl. d. Schw., pag. 161, 2S4 

 t. LXVII, f. 8-16. Simonelli, II moiite della Verna ed i suoi fos- 

 sili, p. 4. Squin., Contr. Fl. foss. terr. terz. d. Liguria, Alghe, 

 p. XVIII. Munsieria minima Squin., Fuc. ed Eimintli., p. 13, 

 t. XVI, f. 5; Sacco , Note di paleoicnol. ital. p. 20. — Fronde par- 

 vula ramulis sterilibus 1-1 V2 ™'"' latis, linearibus, evidenter arti- 

 culatis; conceptaculis globosis, Sy^-^ mm. latis. 



In schisto calcareo formationis eocenicae superioris c. Rocca di 

 Chiusi» Tuscice (Simonelli) ; ad « Madonna del Monto» prope 

 Genuam in calcareo eocenico superiore (Squin.). 



Gen. Hydrodictyopsls Mass., FI. foss. Senigagliese, p 93. 

 Fila tenuissima, gelatinoso-mucosa, reticulatim conjuncta, macu- 

 las regulares irregularesque efformantia. 



1. Hydrodictyopsis primaeva Mass., Synop. FI. fos^. Senog., p 5,- Fl. 2S5 

 foss. Senig., p. 94, t. I, f. 8 a,b. Ht/drodicif/on prim.cevmn Mass., 

 Lett. a Scarab., p. 9, n. 10. — Filamentis mucosis, maculas sub- 

 irregulares, tetragonas subrhomboidalesque efFormantibus. 



In marga gypsosa miocenica (( Sinigaglia » in agro IJmhro (Mass.). 



— Maculae minores quam in II. priscam Mass. H>/dr. utriculaio 

 Roth. similis. Probabiliter etiam Conferviies Ncegeli Heer ad hoc 

 genus adscribenda sec. cl. Massalongo. 



2. Hydrodictyopsis prisca Mass., Synop. Fl. foss. Senog., p. 5,- Fl. 286 

 foss. Senig., p. 93, t. II, f. 1. Hydrodiciyon priscum Mass., Lett. 



a Scarab. p. 9, n. 9. — Filis anastomosantibus, maculas irregula- 

 res raro pentagonas massamque digitiformem efformantibus. 



In marga gypsosa miocenica «Sinigaglia» in agro77m^>'o(MASS.). 



— Mac. rara. 4 diara , cm. 1 long. (Mass.). 



