KONGL. SV. VfiT. ARADfiMIENfi HANt)Lm6AR. B\ND 27. N:0 3. 97 



0,01 mm., radiate at the ends. — Nav. Glavic. G-reg. D. of Clyde p. 478 PL IX f. 5. A. S N. 

 S. D. PI. II f. 28. Pant. II PL VI f. 110. 



Marine: North Sea (Coasts of Scotland Greg.) Sweden! Balearic Islands! Bremia, foss. 

 Hungary (Pant.). 



Var. javanica Cl. — L. 0,04; B. 0,oo9 mm. Striae 18 in 0,oi mm. parallel. — PL I f. 24. 



Marine: Java! 



74. P. cruciformis Done. (1861). — V. linear, often slightly inflated in the middle, with 

 broad, rounded ends. L. 0,03 to 0,12; B. 0,oi to 0,oi4 mm. Median line with rather approximate 

 central pores, and hook-shaped, large terminal fissures. Axial area indistinct, central area a broad 

 fascia, dilated outwards and reaching to the margin. Striae 10 — 12 in 0,oi mm. radiate in the 

 middle, convergent at the ends, crossed by a faint longitudinal depression. — Nav. cruc. Done. 

 M. J. (N. S.) I p. 10 PL I f. 7. B. D. p. 65 PL X f. 4. A. S. N. S. D. PL II f. 25. V. H. 

 Syn. p. 74 Suppl. A t. 8. 



Marine: Finmark! North Sea (coasts of Sweden, England and Belgium)! Baltic (Trave- 

 munde Dannf.), West Indies! Cape Horn! Seychelles! 



Var. brevior Cl. (1883). — L. 0,035; B. 0,oo9 mm. Strise 14 in 0,oi mm. — Cl. Vega p. 464 

 PL XXXV f. 18. 



Marine: Cape Deschneff! 



Var. upolensis Grun. (1880). — L. 0,058; B. 0,oi mm. Strise 14 in 0,oi mm., slightly ra- 

 diate. — Grun. A. D. p. 28. 



Var. Seychellensis Grun. (Grun. 1880). — V. lanceolate, with broad, rounded ends. L. 0,1.43; 

 B. 0,01 mm. Strise 10 to 12 in 0,oi mm., strongly radiate. — I. c. 



Nav. elata Leud. Fortm. (D. de Ceylon p. 27 PL III f. 28, 1879) seems to belong either to 

 P. cruciformis or to Achnanthes inflata Grun. 



75. P. cruciata Cl. (1881). — V. linear, slightly constricted in the middle. L. 0,o8 7; B. 

 0,0 1 7 (in the middle 0,o 1 4) mm. Median line with small terminal fissures, and approximate central 

 pores. Axial area narrow; central a broad fascia, narrowed outwards. Strise 12 in 0,oi mm. pa- 

 rallel. — Nav. cruc. Cl. N. R. D. p. 6 PL I f. 11. 



Marine: Greenland (?) 



76. P. floridana Cl. (1881). — V. slightly constricted in the middle. L. 0,04 5 to 0,075; 

 B. 0,01 to 0,012 (ends), 0,oo8 to 0,oo9 (middle) mm. Axial area narrow, distinct; central area a 

 broad, transverse fascia. Strise almost parallel, 15 (middle) to 20 (ends) in 0,oi mm. — Nav. flu- 

 minensis var. floridana Cl. N. R. D. p. 6 PL I f. 10. 



Marine: Pensacola (Florida)! 



77. P. excellens Cl. (1890). — V. linear, slender, slightly constricted in the middle, with 

 cuneate ends. L. 0,3; B. 0,03 (middle) to 0,043 (ends). Median line with approximate central pores 

 and small, curved terminal fissures. Axial area narrow, linear, slightly widened in the middle, 

 where on each side of the central nodule is a linear marking. Strise almost parallel, 3 in 0,oi 

 mm., slightly radiate at the ends. — Cl. Diatomiste I p. 31 PL V f. 6. 



Marine: Oamaru Dept., New Zealand (Tempore). 



Var. interrupta Cl. (1890). — L. 0,2 1; B. 0,022 to 0,029 mm. Striae 4 in 0,oi mm. Central 

 area a broad, transverse fascia, reaching to the margin. — Cl. 1. c. p. 31. 

 Marine: Oamaru Dept., New Zealand (Deby Coll.)! 



78. P. lobata Grove a. Sturt (1887). — V. panduriform, with subelliptical segments. L. 0,o9 

 to 0,12; B. 0,025 to 0,03; at the constr. 0,oi5 mm. Median line with approximate central pores 

 and small terminal fissures. Axial area narrow, linear; central area a broad fascia reaching to the 



K. Sv. Vet. Akadcmieiis Handliugar. Bd 37. N:o 3. 13 



