T^i Bacillariese, Striatellacese, Lauderia. 



(H. PeraGaLlo). ' — Lauclerzce pwmlcB Castrac. proxima, exsic- 

 catione haud deformata. 



5. Lauderia dellcatula Perag. in Bull. Soc. Hist. nat. de Toulouse '^098 

 1888, p. 89, t. VI, f. 46, Notarisia IV, n. 16, 1889, p. 885. — Te- 

 nuissima, exsiccatione deformata, frustulis cylindraceis, circiter 50 



u. long., 30 a. diam., apicibus denticulos (in valvis contiguis al- 

 ternantes) prajbentibus; annulis irabricatis, imbricatione spirali. 



Hab. in sinu « Villefranche» in regione nicaeensi mediterranea 

 (H. Peragallo). 



6. Lauderla obtusata (Schousboe) Perag. in Bull. Soc. Hist. nat. de 3099 

 Toulouse 1888, p. 88, t. VI, f. 47, Notarisia IV, n. 16, 1889, p. 885, 

 Diatoma Schousboe in herb. Breb. — Annulis haud imbricatis ; 

 striis decussatis bene conspicuis; apicibus rotundatis, spatium (trun- 

 catum) subtiliter granulatum ostendentibus. 



Hab. in mari mediterraneo ad Tingin (Schousboe). — Diam. 150 

 a. In eodem herbario adest. : Var. suluensls Perag. I. c. ex ar- 

 chipelago Suluensi, quae a tjpo differt punctis multo magis evi- 

 dentibus. 



7. Lauderia? Moseleyana Castrac, Diat. Challenger p. 90, t. 24, f. 9, .3100 

 Notarisia 1889, pag. 758. — Cylindracea, annulata, 87-88 u. lata 



(ex icooe), apicibus planis, parum longior quam latior, linea sutu- 

 rali excentrica; margine granulato. 



Hab. in mari arafurensi (Exped. Challenger). 



Familia XVII. Entopylaceae Grun. 



EntopylacecB Gruii. [18J2] in Wien. Verliandi. XII, p. 320, Rabenli. [1865] FI. 

 Eur. Algar. I, p. 307, De-Toni [1890] Osserv. Tasson. Baeill. p. 909. 



Valva3 dissimiles, costat?e vel transverse striata3, s;<}pe dissepi- 

 mentis annuliformibus, numerosis, subinde rudimentariis instructse. 

 Facies connectivalis subachnanthiforrai-arcuata. 

 Obs. Familia inter Striatellaceas et Eunotiaceas medium locum 

 tenens. 



Conspectus Generum. 



Enlopyla Ehr. — Valvae costat;e, costis in inferiori valva concava inter 

 pseudo-nodulos terminales niajusculos interruptis. Dissepimenta rudimen- 

 taria (incl. Eupleuria Arnott). 



Gephyria Arnott. — Valvae ut in Enlopyla seJ dissepimentis interioribus 

 nullis. 



