22 Algse, Bacillarie?e, Pseudorhaphideae, Eunotiacese, Eunotia. 



rotundatis, costis validis, remotiusculis, 3-4 in 10 a; frustulis e 

 facie connectivali visis cylindrico-ovoideis, ventricosis, serie duplici 

 grantflorum ocellatis. 



In marga pliocenica inferiore agri Spoleiini Urabriae (Castrac). 

 «Urhino» (Castrac.)- — E. Argo affinis. 

 2. Epithemia Hyndmannii M. Sm., in Ann. nat. hist., 1850, p. 124; 71 

 Br. Diat., 1, p. 12, t. I, f. 1. Castrac, Anal. micr. di un calc. d. 

 terr. di Spoleto, p. 6, Atti Acc. Pont. N. Lincei. XXXVIII, Sess. 

 IV, 15 Marzo 1885. Pantan., Vertebr. foss. d. lignite di Spoleto 

 p. 7. — E maximis ; valvis 160-200 longis, late arcuatis, polos 

 versus aequaliter attenuatis, apicibus rotundato-obtusissimis, non 

 porrectis, costis paulo divergentibus, 3-4 in 10 ■j..; striis granulatis 

 6 in 10 a. ; frustulis e facie conuectivali visis semilauceolato-ova- 

 tis, medio valde inflatis. 



In marga pliocenica inferiore agri Spoletini Umbriae (Castrac). 



— E. turgidce affiuis nisi status sporangialis ejusdem, 



•3. Epithemia Zebra (Ehr.) Kuetz., Bacill,, p. 31, t. V, f. 12, b et 72 

 t. XXX, f. 5. Castrac, 1. c, p. 6. Pantan., 1, c, p, 7. — E me- 

 diocribus; valvis cylindraceis 20-60 u.. longis, late convexis, polos 

 versus sensim attenuatis, apicibus obtusis non porrectis, costis va- 

 lidis 3-3,5 in 10 u.. vix radiantibus, striis granulatis circ. 12 in 10 u..; 

 frustulis e facie connectivali visis late lineari-oblongis, versus me- 

 dium plus minus dilatatis, utroque polo rectangulo truncatis, haud 

 (ob costarum apices incrassatos) noduloso-ocellatis, 



In marga pliocenica inferiore agri Spoleiini Umbriae (Castrac). 



— E. Argo proxima. — ■ Var. proboscidea (Kuetz.) Grun., in Wien 

 Verhandl., 1862, p. 329, t. VI, f, 5. Epithemia proboscidea Kuetz., 

 Bacill., p. 35, t. V, f. 13; Castrac, 1. c, p. 6; Pantan., 1. c, p. 7. 

 Valvis 45-50 y.. longis, raagis arcuatis, apicibus porrectis, recur- 

 vatisque ; ceterura ut in typo, 



In marga pliocenica inferiore agri Spoletini Umbriae (Castrac). 



Gen. Eunotla Ehr., Infus., p, 192, 



Valvae arcuatse, ecostatcT' transverse striatae, pseudorhaphe nodu- 

 loque centrali destituta?, pseudonodulis apice praeditae. Frustula libe- 

 ra vel iu fascias conjuncta vel epiphytica e facie connectivali visa re- 

 ctangularia. 



1. Eunotia? cretaB Ehr., Abh. Berl. Ak., 1844, p. 77; Mikr., t. XXII, 73 

 f, 55,50, Cocconema crclcc Ehr., Eur, craid., 1838, p, 73; Nicotra, 



