66 v. T. OLEVE, SYNOPSIS OF THK NAVIPULOID DIATOMS. 



Cl. in Diatomiste I p. 76 Pl. XII f. 5. Nav. Kinlc. Pant. UI Pl. XLII f. 571. Nav. FewMS Pant. 

 III Pl. XXIX f. 422 (1892)? 



Marine: Guern.sey (Grove Coll.)! Mediterraiiean Sea (Naple.s, Nice, Barcelona)! Moron. 

 fossil (Triian). 



This is certainly one of the most beantiful naviculoid diatoms. It was named by tlie late 

 Mr. Truan Nav. Kinkcriana, a iianie given by Pantocsek to another Xavicula {N. Kinlcerii II, IX 

 f. 169). For this reason I proposed to name it N. amoena, bnt having since separated tbe genus 

 Caloneis from Navicula. I prefer tbe name given bj- Trnan. 



68. C. biconstricta (xROve a. Sturt (1887). — V. biconstricted with orbicixlar median and 

 elliptical terminal segments. L. 0,o8; B. 0,oi6 mm. Axial area narrow; central area orbicular. 

 Striai 8 in (),oi mm. Longitiidinal line marginal. — Nar. hk. GtROVE a. Sturt. Quek. M. Club. 

 III (2) p. 132 Pl. X f. 9. 



Marine: Oamarii, New Zealand, fossil! 



69. C. formicina G-run. (1878). — V. biconstricted, with small median and large terminal 

 segments. L. 0, 057 to 0,o85; B. 0,oi2 (max.) to 0,oo4 (min.) mm. Axial area narrow, dilated in 

 the middle to a transverse fascia. Striaj 6 in 0, 01 mm., very delicately punctate. Longitndinal 

 line inframarginal. Frustule rectangular. — Nav. formicina Grun. in Cl. West Ind. D. p. 6. 

 f. 6. A. S. Atl. CLX f. 38 to 41. 



Marine: Campeachy Bay (Grnn.). 



70. C? egeiiii A. S. (1890). — V. biconstricted, with the median .segment smaller than tlie 

 terminal, which are acuminate. L. 0,0.33; B. 0,oos mm. Axial and central areas united in a 

 space of the same shape as the valve. Strise marginal, 11 in 0,oi mm. Longitndinal line? — 

 Nav. egena A. S. Atl. CLX f. 42, 43. 



Marine: Campeachy Bay (A. S.). 



71. C. ophiocephala Cl. a. Grove (1891). — V. very eonvex, divided by two constrictions 

 into three segments, of which the median is almost orbicular, the terminal spathulate. L. 0,o7 to 

 0,085; B. 0,01.3. Median line with indistinct terminal nodoles, enclosed between strong siliceous 

 strings. Axial areas in the terminal segments large, lanceolate. Central area very broad, having 

 a lunate marking or each side of the central nodnle. Striaj 11 in 0,oi mm. at the base of the 

 segments, 13 at the ends, radiate, smooth. Longitndinal line narrow. — Nav. npliiocephala Cl. a. 

 Grove Diatomiste I p. 57 Pl. IX f. 13. 



Marine: Island of Rhea, Singapore! Java! Island of Muntok, Sumatra! Macassar Straits 

 (Grove Coll.)! 



72. C? scintillans Temp. a. Brun. (1889). — V. strongly constricted in the middle. Seg- 

 ments rhomboidal with cuneate ends. L. 0,o9 to 0,125; B. 0,025 to 0,035; at the constriction 0,o 1 2 

 mm. Median line enclosed between strong siliceous strings with small terminal fissures, turned 

 in the same direction, and approxiraate central pores. Axial area narro^v. Central area a broad, 

 transverse fascia. Strite 6 in 0,oi mm. smooth, slightly divergent in the middle of each segment. 

 Longitndinal line(?) approximate to the axial area, indistinct. — Nar. stint. D. f. du Japon p. 45 

 Pl. V f. 5. A. S. Atl. CLX f. 36, 37. 



Marine: Japan, fossil! Jedo (Atl.). 



I am not quite sure whether this form belongs to Caloneis or to Pinnularia. On the hg. 

 in D. f. du Japon a marginal longitndinal line is visible, but I have not seen this line ou original 

 specimens. It seems to me doubtful whether the line close to the axial area is the longitndinal 



