Bacillarieae, Plagiogrammacear), Dimerogramma. 713 



tab. G, f. 14, Rhaphoneis Suy^ireUa Gruii. in Cl. et Moell. Diat. 

 n. 208, V. H. Syn. pa^. 147, tab. 36, fig. 26, 27 a, Rhaphonets 

 Rhombus Gnin. in Wien. Verhaiidl. 1862, pag. 381, t. 4, f. 36, 

 non Elir. — Valvis late lanceolatis, apicibus rotundatis, circ. 25- 

 60^:12-15, pseudorhaplie lineari, levi, apicibus plerumque paullo 

 dilatata; striis transversis punctatis, confertis, vix radiantibus. 



Ilab. in portubus « Ostende » et «Dieppe» (Grunow); ad «Cux- 

 haven» (Ehrenberg); ad ins. S. Bartholomaeum (Cleve) ; in aquis 

 marinis ad (c Blankenberghe» Belgii. — Var. australe Grun. in 

 V. H. Syn. p. 147, t. 37, f. 27 b: pseudorhaphe latiore tantura 

 medio contracta. Curn typo. 



7. Dimerogramma ventricosum (Rab. et Jan.) Grun. in fledwigia VI, ^882 

 p. 2, Cleve Diat. fr. West Ind. Archip. p. 11, Denticella ventricosa 

 Jan. et Rabenli. Diat. Hond. p. 8, t. 2, fig. 11. — Frustulis e fa- 



cie connectivali visis linearibus, apicibus truncatulis, margine bre- 

 ve costulatis, in fascias plus minus longas conjunctis; valvis na- 

 viculaceis, oblongo-ellipticis, medio tumidis, margine lineis trans- 

 versis moniliformibus ornatis, pseudorhaphe angusta, lineari, no- 

 dulis nullis. 



Hab. adSargassa ex ((Honduras» reportata (Janisch); ad in- 

 sulas Virginum (Cleve). — E diagnosi nullam adesse pseudorha- 

 phen dicitur sed icon pseudorhaphen linearera raanifesto demon- 

 strat. 



8. Dlmerogramma ceylanicum Cleve Diat. Vega p. 507, t. 37, f. 58. 2883 

 — Lineare, 80 := 10, apicibus rotundatis, striis puuctatis, raargina- 

 libus, 16 in 10 u.. 



Hab. in aquis marinis ad (( Point de Galle» insulae Cejlonae 

 (Kjellman). — Verisimiliter hujus sectionis. 



9. Dimerogramma fossile Grun. in Cleve et Moeller Typ. n. 215, 216 2 884 

 et in Pantocsek Foss. Bacill. Uugar. I, p. 33, t. VIII, f. 67, t. XXVII, 



f. 265, Notarisia 1888, p. 622. — Valvis late lanceolatis, subrhom- 

 bicis, 33-44 ^ 12-13, obtusiusculis; granulis raagnis, oblongis, utrin- 

 que uniserialibus, marginalibus, 3-5 in 10 a. 



Hab. fossile ad (( Aizo-Felso-Esztergaly, Szent-Peter )) in Hun- 

 garia et in strato tertiario prope (( Nottigham ». — Videtur hujus 

 sectionis. 



10. Dlmerogramma boryanum Pant. Foss. Bacill. Ung. II, p. 62. — 2885 

 Frustulis concatenatis, e facie connectivali visis rectangulis, mera- 

 brana connectivali nuda biplicata, angulis obtusis, polis quasi tri- 

 gibbis, lateribus ad polos constrictis, striolatis, striis 15 in 10 u., 



