728 Bacillarieae, Plagiogramraaceae, Plagiogramma. 



Sectio IV. Valvse tantum costis 2 terminalibus instruetae vel costis carentes. 



45. Plagiogramma Papilio Cleve et Grove in Diatomiste 1891, p. 55, 2942 

 t. 8, f. 17. — Valvis 45 *; 20, medio contractis et hic 11 a. latis, 

 dein dilatatis, apicibus angustis, porrectis, obtusis, annulo centrali 

 (pseudonodulo) parvo orbiculari, pseudorhaphe angusta , lineari, 

 areis terminalibns indeterminatis, costis transversis limitatis, costis 

 transversis in cetera valvae superficie absentibus; striis circiter 



10 in 10 a., subradiantibus, punctatis, punctis 10 in 10 a. 



Hab. in freto «Macassar» et ad «Port Jackson» (Cleve, Grove). 



46. Plaglogramma nankoorense Gruu. in Cleve Diat. Vega p. 512, ^^43 

 Plagiogramma constriclum var.? nankooreme Grun. Alg. No- 

 vara p. 95, t. 1 A, f. 8, Plagiogramma ceylanense Leud.-Fortm. 

 Diat. Ceyl. p. 52, t. 5, f. 59. — Valvis oblongis, circ. 68 ^ 28, 

 medio constrictis et hic 16 a. latis, dein inflatis, apicibus productis, 

 latis, rotundatis, annulo centrali suborbiculari area levi transversa 

 subrectangulari cincto, pseudonodulis terminalibus ellipticis, serie- 



bus transversis granulorum medio pseudorhaphe angustissima at 

 distincta interruptis, 7 in 10 p.., granulis in series longitudinales 

 dispositis. 



Hab. fossile in aPolycystiueen-Gestein» ex insula nicobarica 

 (( Nankoori )) (Frauenfeld, Grunow) et in depositu «Monterey» 

 (Cleve) ; vivum in aquis marinis prope «Colombo» insulaa Cey- 

 lonae (Craven, Leuduger-Fortmorel) nec non iuter «Aden et 

 Bab-el-Mandeb» (Cleve); ad ((Madagascar » (Cleve). — Var. ml- 

 nutum Cleve Diat. Vega p. 512: valvis 35 {j.. longis, seriebus gra- 

 nulorum 12 in 10 a. Ad «Port Jackson » (Cleve). — Subsp. tri- 

 COnstrlctum Cleve et Grove in Diatomiste 1891, p. 55, t. 8, f. 15-16 

 (ut var.): valvis medio 80-270 := 25-30, constrictis, deiu inter medium 

 et apices tumidis, apicibus subacutis rotundatisve, pseudostauro lato 

 centro annulum circularem prsebente, pseudorhaplie lineari angusta; 

 pseudonodulis (areis) terminalibus cuneiformibus ; granulis 5-7 in 

 10 (i.., in series transversas 6 in 10 y.. versus apices paullo radiantes 

 dispositis, costis transversis nulli^s; frustulis e facie connectivali vi- 

 sis rectangularibus, zona connectivali lineis suturae leiiiter pun- 

 ctatis. In freto (( Macassarn ; ad ins. « Madagascar». 



Species mihi rainus cognitae. 



47. Plaglogramma Truanii Pant. Foss. Bacill. Ung. II, p. 62. — Fru- 2944 

 stulis coucatenatis, e facie counectivali visis rectangulis, 71-72 =; 20, 



