60 P. T. CLEVE, SYNOPSIS OF THE NAVICULOID DIATOMS. 



This is a remarkable form, not closely connected with any other known species. Perhaps 

 Sfanroneis Bribissonii Castr. (Voy. Chall. Diat. p. 24 Pl. 15 fig. 4) may be the same, but the 

 figure and description of that form are insufficdent for Identification. 



39. C. samoensis G-run. (1877). — V. linear to elliptic-linear, narrowed toward.s the ends^. 

 L. 0,085 to 0,115 ; B. 0,0 18 to 0,025 mm. Axial and central areas ixnited in a narrow, irregii- 

 larly lanceolate, space, having on each side of tlie central nodnle a lunate or linear niarking. 

 Strife 10 to 12 in 0,oi mm. slightly radiate at the ends. Longitudinal line median or suLmarginal. 

 — Nav. samoensis A. S. Atl. L. f. 43, 44. Nav. mammalis Castr. Chall. Voy. D. p. 30 Pl. XX 

 f. 2 (1886)? 



Marine: Ceylon! Amboina (Kinker Coll.), Java (Kinker Coll.)! Pbilippines! Labuaiil Port 

 Jackson! Samoa! 



Var.? himaculata Pant. (1889). — V. elliptic-lanceolate. L. O.064; B. 0,oi9 mm. Area lan- 

 ceolate with markings on both sides of the central nodule. Strise 14 to 15 in 0,oi mm. Longi- 

 tudinal lines? — Nav. him. Pant. II p. 42 Pl. XXIII f. 346. 



Marine: Hungary, fossil (Pant.). 



40. C. sectilis A. S. (1877). — V. linear with rounded ends. L. 0,144; B. 0,023 mm. 

 Axial and central areas nniting in a broad linear space, with a row of puncta along the median 

 line. Striffi. 7,5 in 0,oi mm., parallel. Longitudinal lines snbraarginal. — Nav. sectilis A. S. 

 Atl. L. f. 3. 



Marine: Whatabevot, India (Atl.) Hungary, fossil (Pant.). 



Var. Jjoryana Pant. (1889). — L. 0,oi to 0,13; B. 0,02 to 0, 024 mm. Area with a row of 

 piincta on both sides of the central nodule. Strise 8 to 9 in 0, 01 mm. Longitudinal lines margi- 

 nal or inframarginal. — Nav. Boryann Pant. II, XXVIII f. 407. 



Marine: Gulf of Naples! Bory, Hungary, fossil! Galapagos Islands (Weissflog Coll.)! 



N'av. pavida Pant. III Pl. XXX f. 438 appears to be an allied but smaller form. 



41. C. Anderssonii Cl. (1881). — V. linear. with subcuneate ends. L. O.ovs; B. O,oi;i mm. 

 Axial area narrow, dilated around the central nodule, to an orbicular space without markings. 

 StricB 6,5 to 7 in 0,o 1 mm., radiate at the ends, not punctate. Longitudinal lines inframarginal. 

 N. And. Cl. N. Pv. D. p. 11 Pl. III f. 28. Cal. And. Icon. n. Part. II Pl. I f. 8. 



Marine: Galapagos Islands. 



The fig. in Cl. N. R. I), is not quite exact, the axial area being too broad. 



42. C. Fräter Cl. N. Sp. — V. convex, linear, with parallel margins and rounded cuneate 

 ends. L. 0,i; B. 0,oi2 mm. Axial and central areas united in a narrow, lanceolate space, 

 without markings. Striaj 8 in O, o 1 mm., sniooth, slightly radiate in the middle and at the ends. 

 Longitudinal lines inframarginal. — Pl. III f. 26. 



Marine: Galapagos Islands! 



43. C. Spatlmla Brun (1891). — V. linear, narrowed toward.s the ends. L. O, i,^ to O, ib; 

 B. 0,01 to 0,012 mm. Axial area linear, very narrow; central area indistinct. Stritv 12 in (l.m 

 mm. parallel, divergent at the ends finely punctate. Longitudinal line marginal or inframarginal 

 — Nav. spat. Brun. D. Esp. n. p. 40 Pl. XV f. 10. 



Marine: Japan, fossil (Brun Coll.)! 



44. 0. adenen.sis Cl. N. Sp. — V. elongated, slightly biconstricted, with cuneate ends. 

 L. 0,07; B. 0,0 13 mm. Axial area narrow, irregularly dilated between the centi'al nodule and the 

 ends. Central area large, orbicular. Striai 13 (middle) to 15 (ends) in 0, 01 mm., radiate in the 

 middle, transverse at the ends, not distinctly punctate. Longitudinal lines inframarginal. — 

 Pl. III f. 33. 



Marine: Between Aden and Bab el niandeb (Weissflog Coll.)! 



