47 



Salisburgum (Zambra, Sauter) , inter mugoos prope Botzen (v. Haua- 

 mann), ad Charaa et Hypna prope Perdoneg Tyrolis australis, in lacu 

 „Traunsee" et ad Kufstein (v. Hcurler); in rivulis circa Vucklabriick 

 Austriae (v. Morl), in Austria superiori (Schiedermayr) ; prope Meran 

 Tyroiia australia socio Mclosira arenaria (Milde), ad Casaccio (C. Cramer) ; 

 prope Fraueofurtuni ad M. (Frcsenius); propc Degendorf Bavariae in 

 consortio BCelofiirae arenariae (Sendtner) ; circa Chemnitz Saxoniae 

 (Weicker) ; in lacu salso Thuringiae in consortio Bacillariae paradoxae, 

 Surirellae striatulae etc. (Bulnheim) ; prope Strchlen Silesiae (Bleisch) ; 

 in paludosis inter Mcesias prope Sainte-Croix , Bemont et Brevine Ju- 

 Tassi (Lesquereux) , prope Falaise (De Brebisson) ; in pluribug locis 

 Angliae (W. Smith, Capron, Brightwell, Norman). 



Fossilis : prope Berolinum , in topho pumicoso rhenano ad montem 

 Hochsimmer ; in farina silicea prope Santafioram Italiae ; ad Down, 

 Mourne Mountains Hiberniae. 



b. Area plus minusve angustata, saepius linea media percursa. 



C. clypeus Ehrb. (Abh. 1841. p. 11. Microg. T. X. I. F. 1. Ktz. 

 Bac. p. 59. T. 2. F. V. 1—6. Pritch. Inf. p. 801. T. XVII. F. 510— 518. 

 Rabenh. Alg. N. 1181. Sm. Diat. II. 88.). Suborbicularis, ephippii- 

 formi-fiexuosus ; costis radiantibus medio quasi interruptis ; area ob- 

 longo-rotundata, punctata, vitta media hyalina percursa notata. 



Diam. ad '/is'" = 0,0049". 



Hab. in submarinis Angliae , e. gr. prope Breydon ( Wigham ), 

 Swansea (Okeden) ; in limo portuum prope Ostende, Cuxhaven, Bremer- 

 hafen, in fundo maris adriatici (Dr. Lorenz) , in lacu Peisoni (Xeu- 

 siedler See, teste Grunowio) ; Ischia : in lacu parvulo, ubi aqua calida 

 e balneis defiuit. Fossilis prope Franzensbad Bohemiae, ad Santafioram 

 Italiae, Peru-Guano. 



C. bicostatus 8m. (Diat. II. p. 88. Roper in Micr. Journ. II. 

 T. VI. F. 4. Grun. in Wien. Verh. 1862. p. 444. T. X. F. 1—3.). 

 Suborbicularis vel quadrangulus, ephippiiformis ; costis radiantibus medio 

 perfecte interruptis, coronas duas formantibus; interstitiis seriatim 

 punctatis ; area oblonga vel anguste lanceolata laevi. 



Diam. t/e» — l/W- = 0,0015—0,0022". 



Hab. in lacu Peisoni et in submarinis mari Baltici (Grunow) ; in 

 fundo maris adriatici (Lorenz) ; ad oras et in ostiis fiuviorum Angliae 

 (Roper, Bridgman , Capron, JSTorman), Galliae (De Brebisson). 



C. parvulus Sm. (Diat. I. p. 30. T. VI. F. 56. Pritch. Inf. p. 801. 



