Bacillariese, Surirellaceto, Podocystis. 601 



f. 3-4. — Elliptico-suborbicularis, 10-110 ::; 50-75, polis ai>iculo sub- 

 rostriforini producto, uudulis tribus; striis obscuris. 



llab. in aqua dulci Anglise et Scotias (Gregory, W. Smith, 

 DiCKiE), GalliEe pr. « Falaise » (Brebisson). — Var. rhombica Chase 

 in Chicago Diatouis (nomea). 

 (3. Cymatopleura angulati Grev. in Trans. Micr. Soc. 1862, p. 89, t. 9, 2-115 

 f. 1. — Valvis auguste oblongis, 75-120 - 32-30, medio vix constri- 

 ctis, apicibus subcuneatis, undulis transversis in frustuli apicibus 

 aream angulatam linquentibus ; margine serie punctorum minuto- 

 rum, circiter 4 io 10 j.. donato. 



Hab. in guano Californiae. — Cymatopleurcc ellipiicce afRnis. 

 Undulse circiter 7. 



7. Cymatopleura Cochlea Brun Diat. esp. nouv. 1891, p. 25, t. 22, 9^1,5 

 f. 5. — Valvis ex elliptico ovatis, 120-150 s 55-65, costulis mar- 

 garitaceis limbatis , 5-8-ies transverse depressis, deprossioaibus 

 zig-zag ad instar undulatis, apices versus rotundatis; superficie 

 valvce subtiliter punctata; striis trausversis parum visibilibus. 



Hab. ad ccCabenda)) Africa3 occidentalis ; in portu Noveboracense 

 et ia Portu Priacipis. 



8. Cymatopleura Campylodiscus Bail. in B. J. N. 0. p. 330, 1. 1, t. 9, 9417 

 Sm. Sp. T. N. 041, Bail. 1854, f. l. 



9. Cymatopleura spiralis Chase in Chicago Diatoms. Cfr. Habirsh. ^418 

 Cat. of Diat. p. 86. 



Species a genere removendae. 



10. Cymatopleura thermalis Ralfs in Pritch. Inf. p. 940 est Nitzschia 2419 

 Ihernialis Auersw. 



11. Cymatopleura multifasciata Ralfs in Pritch. Inf. p. 940 est Nitz- 2420 

 achiacea. 



PODOCYSTIS Kuetz. [1844J Bacill. p. 02 (Etym. pous, poclos pes et 

 ct/slis vesica), Rabenh. Fl. Eur. Algar. 1, p. 60, De-Toni Osserv. 

 Tasson. Bacill. 1890, p. 903, Euphyllodium Shadb. [1854] in Trans. 

 Micr. Soc. II, p. U, Surireltce sp. Menegh., Doryphorce sp. Ro- 

 per. — Frustula Surirayce cuneata, stipitata, adfixa, maritima. 



I. Podocystis adriatica Kuetz. Bac. p. 62, T. 7, f. 8 et T. 30, F. 80, 2121 

 Pritch. Inf. p. 772, T. IV, F. 10, Grun. ia Wien. Verh. 1802, p. 467, 

 T. X, F. 13, Rabenh. Fl. Fur. Algar. I, p. 60, f. 14, V. H. Syn. 

 t. 55, f. 8!, Euphyliodiu?n spathulatum Shadbolt ia Transact. of 



