82 v. T. CI.KVE, SYNOPSIS OF THE NAVKTLOID DIATOMS. 



Var. (UniieMriata A. S. (1881). — Smaller. Cost;t 11 in d.oi min. - Nar. siilinicla r. denseMr. 



A. S. Atl. LXIX f. 45. 



Marine: California (Atl.). 



9. D. laciiiiosa A. S. (1875). — V. stroiigly oonstricted in tlie middle, with ro.stratp eiuls. 

 L. 0,033; B. 0,012; at the constr. 0,oo76 mm. Central nodule verv i^mall; its horns parallel. 

 Furrows narrow, not dilated in the middle. Costas strongly divergent toward.'^ the margins, \-> in 

 0,01 mm. — Nav. lac. A. S. Atl. XII f. 54. 



Marine: Java (Atl.). 



10. D. coiigrua Jan. (1881). — V. linear, with broad, eapitate end.s. L. O.or, ; B. O.uiae 

 mm. Central nodnle small; its horns parallel, approximate. Furrows very narrow. .slightly dilated 

 in the middle. Costse 12 in 0. 01 mm. — Nav. congr. Jan. A. S. Atl. LXX f. Ö6. 



Marine: ? 



This species is unknown to the author. The %. in Atl. does not show the .structnre. Pro- 

 bably akin to D. litnralis. 



11. D. Cynthia A. S. (1875). — V. narrow, elliptical, with rounded ends. L. 0,o5to0,075; 



B. 0,0 18 to 0,0 2 5 mm. Central nodule small; its horns parallel, approximate. Furrows broad, 

 linear, forming a narrow elliptical space, a third as broad as the valvé. Costas 7 in O.oi mm., 

 parallel, radiate at the ends, continued aeross the furrows. — Nar. Cynthia A. S. Atl. VIII f. 41. 



Marine: Red Sea (Van Heurck Coll.)! Seychelles {Ym\ Heurek CoU.)! Madagascar! Java I 

 Tahiti! West Indies! 



Ya,T. elongata Cl. — L. 0,13; B. 0,038 mm. Costce 13 in 0, 01 mm. 



Marine: Java! 



Var. sibirica Cl. — L. 0,ori; B. 0,017 mm. Costa; 11 in 0,oi mm. 



Marine: Cape Wankarema! 



Var. mimita Cl. — L. 0,035; B. 0,ui mm. Costte 15 in 0,oi mm. — A. S. Atl. VTII f. 28. 



Marine: Cape Good Hope (Atl.) Gralapagos I.sland.s! 



12. D. mediterranea Grun.. (1875). — V. linear with rounded or cuneate ends. L. 0,053; 

 B. 0,021 mm. Central nodnle small; its horns parallel. Furrows broad, with a row of puncta: 

 Costie 7 in 0, 01 mm. — Nav. //emmatn r. nwdiierranen Grun. in A. S. Atl. VIII f. 42. 



Marine: ? 



1?). D. inunda Jan. (1881). — Y. linear, with rounded ends. L. 0,047; B. 0,oi5 mm. 

 Central nodnle very small; its horns parallel, approximate. Furrows Ijroadest in the middle. 

 gradually tapering to the ends. Costaj 7 in 0, 01 mm. marginal, not reaching tlie furrows. — Nar. 

 nmnda A. S. Atl. LXX f. 70. 



Marine: ? 



The oostfe are figured coarsely punctate, but nevertheless tlie general appearanee of tliis 

 species agrees most with D. iiieditcrranea. 



14. D. contigua A. S. (1875). — V. linear, with rounded or .subcuneate ends. L. O.nee to 

 O.h; b. 0,0 17 to 0.03 mm. Central nodule large, quadrate, with parallel, approximate horns. 

 Fui'rows ver\' bi'oad, linear, crossed by rudimentary costfe ov liy a double i-ow of large puncta. 

 Costie (1 to 7 in o,(ii mm. Nav. cont. A. S. Atl. VIII f.4;j. Nar. Tlinmii Pant. I p. 29 Pl. X 

 f. 85 (188G). 



Marine: Japan (Deby CoU.)! Fossil: Oamaru N. Zeal.! S:t Peter, Huugary! 



Var. Zcrheiitcri Pant. (188{!). — L. 0,072; B. 0,o 1 7 mm. Costie 8 in O.oi mm. — Nar. 

 Ze.chenieri Pant. I p. 30 Pl. XIV f. 118. 



Marine: Hnngarj', fossil (Pant.). 



