746 Bacillariece, Striatellaceae, Tetracyclus. 



15. Tabellaria Clavator Ehr, in Ber. Berl. Akad. 1843, p. 47, Mi- 3001 

 krog. p. 90, 



Hab. ad «P>argasina» Asi?e borealis (Ehrenberg). 



16. Tabellaria Pinnularia Ehr. Mikrogeol. p. 83 et 115, Pritch. Inf. 3002 

 p. 807. 



Hab. in aquis dulcibus Sibirise occidentalis et Persiae austra- 

 lis (Ehrenberg;. 



17. Tabellaria platystoma Ehr. Mikrogeol. p. 11, Pritch. Inf. p. 807. 3003 



Hab. inter Confervam ex insulis saadvicensibus reportatam 

 (Gaudichaud, Ehrenberg). 



18. Tabellaria rhabdosoma Ehr. Mikrogeol. p. 11, Pritch. Inf. p. 807. 3004 



Hab. inter Confervam ex insulis sandvicensibus reportatam 

 (Gaudichaud, Ehrenberg); in Persia australi (Ehrenberg). 



19. Tabeliaria Semen Ehr. Mikrogeol. p. 122, Pritch. Inf. p. 807. 3005 



llab. in aquis dulcibus ad «Pondichery, Caroraandel» Indise 

 (Ehrenberg). 



20. Tabellaria Bacillum Ehr. in Pritch. Inf. p. 807. 3oo6 



21. Tabellaria Thwaitesii Olney in Leus I, p. 135. 3007 



TETRACYCLUS Ralfs [1843] in Ann. a. Mag. Nat. Hist. vol. XII 

 (Etym. tetra quatuor et ci/clos circulus), Rabenh. FI. Eur. Algar. 

 1, p. 302, Kirchn. Alg. Schles. p. 221, Grun. in Wien. Verhandl. 

 1862, p. 411, Brun Diat. AIp. p. 131, V. H. Syn. p. 166, De-Toni 

 Osserv. Tasson. Bacill. p. 908, Biblarium Ehr. [1844] in Ber. Berl. 

 Akad. 1844, p. 265, Gomphogramma A. Br. [1852] in Rabenh. 

 Siissw. Diat. p. 33, Fl. Eur. Algar. I, p. 116. — Frustula tabulata, 

 plerumque in fascias breves conjuncta, longitudinaliter vittata, dis- 

 sepimentis internis pluribus subclavatis semel perforatis. valva? me- 

 dio plus minus tumidce, costis paucis transversis perviis donatse, no- 

 dulis nullis. Phaeophora granuliformia, sparsa. 



I. Gomphogramma (A. Br.) 



I. Tetracyclus rupestris (A. Br.) Grun. in V. H. Syn. p. 167, t. 52, 3oi)s 

 f. 13-14, Gomphogram,ma rupesire A. Br. in Rubenh. Siissw. 

 Diat. |). 33, t. 9, f. 1, Alg. n. 624, 1245, Fl. Eur. Algar. I, p. 116, 

 f. 31, Pritch. Inf. t. 4. f. 46, Schum. Diat. H. Tatra p. 56, t. 1, 

 f. 11, Tetracgclus Braunii Grmi. in Wien. Verhandl. 1862, p. 412, 

 t. 7, f. 37, Kirchn. Alg. Schles. p. 211, Brun Diat. Alp. p. 131, 

 t. 3, f. 33. — Valvis elliptico-laaceolatis, plerumque costas trans- 

 versas robustas 2-5 (raro ultra) prsebentibus, 8-25 u.. longis, striis 



