KONGL. SV. VET. AKADEMIENS HANDLINGAU. BAND 26. N:0 2. 35 



oblique striae equidistant, 20 to 24 in 0,0 1 mm.; angle about 60°. — F. Nubecula W. Sm. B. I). 1 

 p. 64 PL XXI f. 201. Grun. A. B. p. 52. Per. V f. 2(). V. Nub. var. purvula Geun. A. D. p. 52. 

 P. Tlimnii Castr. in Per. p. 14 PI. V f. 25 (1891). 



Marine: Finmark! North Sea! Adriatic ((Trun.), Sumatra (var. in L. 0,i4; B. 0,ui4 mm. 

 Striae 2Q in 0,oi mm.)! California! 



Var. intermfdia W. Sm. (1853). — L. 0,i4 to 0,44; B. 0,o2 to 0,o22 mm. Stritii 20 to 22 in 

 0,0 1 mm. — P. interm. W. Sm. B. D. I p. 64 PL XXI f. 200. V. H. Syn. p. 116 PL XVIII f. 6. 

 Per. p. 13 PL V f. 27, 28. 



Marine: North Sea! Port Jackson! 



Var. aniphipleuroidcs Grun. (1867). — L. 0,i3 to 0,3 mm. Strite 24 to 27 in 0,oi mm. — P. 

 interm. v. amphipl. Grun. Hedwigia 1867 p. 29. 



Marine: Honduras (Grun.). 



Var. subrecta Cl. (1880). — L. 0,28; B. 0,022 mm. Transv. and obi. stria; 'V17, 'Vis' '7i9 i^^^ 

 0,01 mm. — P. sttbrect. Cl. A. L). p. 14 PL III f. 72. Per. V, 30. P. elongatum var. balearica 

 Per p. 7 PL II f. 22. 



Marine: Greenland! Finmark! Sea of Kara! Balearic Islands! 



Var. mauritiana Grun. (Ms). — L. 0,i3 to 0,i6; B. 0,012 to 0,oi3 mm. Transv. and obi. 

 striae 22,5 in 0,oi mm. 



Marine: Mauritius (Grun.). 



There is no difference between P. Nubecula and P. intermedium except in the size. By its 

 varieties P. Nubecula is closely connected with P. elongatum. 



2. P. Peragalli Brun. (1891). — V. narrow lanceolate, gradually tapering from the middle 

 to the obtuse ends. L. 0,3; B. 0,04 mm. Central nodule small, rounded. Median line straight, 

 central. Transverse striae closer than the oblique. Transv. and obi. striae ^^/j^ (Per), "^^/jg (Brun's 

 fig.) in 0,01 mm. — P. Perag. Brun. in Per. p. 9 PL III f. 20. D. esp. n. PL XX f. 6^ 



Marine: Japan, fossil (Brun.). 



Var. perangusta Cl. — ■ L. 0,3; B. 0,oi8 to 0,024 mm. Transv. and obi. striae ^^/\^, 'Vie 

 in 0,01 mm. 



Marine: China (Deby Coll.)! Balearic Islands! 



Var. gracilior Cl. — L. 0,i8; B. 0,oi2 mm. Transv. and obi. striae --'/jg in 0,oi mm. 



Marine: China (Deby Coll.)! 



This species seems to be nearest akin to P. subrigidum and P. longum. It has exactly tlie 

 shape of P. intermedium, but the striation is different. 



3. P. ibericum Per. (1891). — V. narrow lanceolate, with slightly rostrate, obtuse ends. 

 L. 0,09 to 0,12; B. 0,0 15 to 0,02 mm. Median line central, slightly flexuose, curved at the ends. 

 Transv. and obi. striae '-^Voy, 24/_^_^ (Per.), 2^/25 in 0,oi mm. Median striae less acute. — Per. p. 8 

 PL III f. 12. 



Marine: Balearic Islands! 



4. P. cuspidatum Cl. (1881). — V. broad, lanceolate, scarcely sigmoid, with produced and 

 rostrate ends. L. 0,o7 7 to 0,i; B. 0,022 to 0,025 mm. Median line straight, central. Transv. and 

 obi. striae '7i9' ^"'21' '%o' "'/22' '^V24 i'^ 0,oi mm. — P. lanceolatum var. cusj). Cl. N. R. D. p. 5 

 PL I f. 7. Per. V. f. 16. 



Marine: Firth of Tay! Port Jackson! 



5. P. directum Grun. (1880). — V. rhombic-lanceolate, subacute. L. 0,243; B. 0,04 mm. 

 Median line straight, central. Transv. and obL striae 18,5 in 0,oi mm. Angle 60'. — Grun. A. D. 

 p. 53. Cl. M. D. N:o 125. Per. V. f. 29. 



Marine: Antarctic Ocean (Grun.). 



