KONGL, SV. VET. AKADKMIKNS IIANDl.INGAH. HANI) 26. N;o 2. 37 



and obi. striae >**/,- ('^7i8 Perao.) in O.oi mm. — Brun. and Temp. D. fo.ss. dn Japon p. 48 PI. IX 

 f. 9. Pkr. p. 11 pi. IV f. 14. 



Marine: Hungary, Kekko! Japan (Brun.). 



11. P. polagicum Per. (1891). — V. scarcely .sigmoid, lanceolate, acute. L. 0,if, to 0,17; 

 B. 0,023 to OjU^T) mm. Median line strongly sigmoid. Median oblique stritc not more distant than 

 the others. Transv. and obi. strife -V19, -72o- Angle about G5\ — P. acutum var. australica and 

 P. pelagicum Per. p. 7 PI. Ill f. 3. 



Marine (pelagic): Bay of Bengal! Java (Deby Coll.)! 



This species was mistaken by me for F. acutum var. (iiislral., which is more like the fig. 2 

 PI. Ill in Per. Monograph. It seems nevertheless akin to P. acutum, and to be related to that 

 species as P. naviculaceum is to P. Normanii. 



12. P. lanceolatum I)onk. (1858). — V. scarcely sigmoid lanceolate, with slightly pro- 

 tracted acute ends. L. (),o8 to O.i ; B. 0,02,3 to 0,025 mm. Median line flexuose. Ti-ansv. and obi. 

 striffi equidistant 20 to 22 in 0,oi mm. Angle about fiO\ — Donk. T. M. S. 1858 p. 22 PI. HI 

 f. 4. Grun. a. D. p. 53. Per. p. 12 PL V f. 14. P. trans vrrsale ^ Roper M. J VI p. 25 PI. Ill 

 f. 11. P. (Bstuarii Per. V. f. 13? 



Marine: Coasts of Scotland and England! 



Var. tahitensis Grun. (1880). — L. 0,ii8; B. 0,0 le mm. Striae 22 in 0,oi mm. — P. lane, 

 var. takit. Grun. A. D. p. 53. 



Marine: Tahiti (Grun.). 



The median strict of P. lanceolatum are a little more distant than the terminal, which 

 points to an affinity with P. naviculaceum. On the other hand it is nearly related to P. (fstuarii, 

 into which species it seems to graduate. 



13. P. luariniim Donk. (1858). — V. very slightly sigmoid, lanceolate, with obtuse ends. 

 L. 0,11 to 0,18; B. 0,02 to 0,03 mm. Median line undulating, excentric towards the ends. Central 

 nodule rounded. Transv. and obi. strife -\\^, 2;y_^^^ 24/_^^^ 2:y^^ (Barbados). — Donk. T. M. S. VI 

 p. 22 PI. Ill f. 3. Per. Ill f. 11. P. mar. var. Antillm-um Per. p. 8 PL III f. 19. P. mar. var. 

 harhadensis Grun. A. D. p. 50. 



Marine: Coasts of England and Scotland! Port Jackson! Jjabuan! Barbados! 

 Var. italica Per. (1891). — L. 0,3 to 0,32; B. 0,oc8 mm. Central nodule quadrate. Transv. 

 and obi. strise •6/,, (Per.), i%5 (Per), 'V,,, ''Vie- — P^- ^M- PeR- P- 8 PL III f. 10. 

 Marine: Gulf of Naples! Adriatic! 



14. P. Clevel Grun. (1880). — V. slightly sigmoid, very narrow, with attenuate ends. L. 

 0,14 to 0,21; B. 0,009.') to 0,01 mm. Median line central. Transv. and obi. strife '^■'i,,^ in (),oi mm. 

 — Grun. A. D. p. 52 PL III f. 70. Per. V. fig. 17, 18. 



Marine: Sea of Kara (Grun.). 



Var. sibirica Grun. Ms. — V. gradually tapering from the middle to the subacute ends. L. 

 0,2; B. 0,011 mm. Transv. and obi. strife 28 in 0,oi mm. 



Marine: Cape Wankarema (Grun.). 



Var. cornuta Grun. Ms. — V. narrow lanceolate, attenuate into long narrow beaks. L. 0, 12; 

 B. 0,0075 mm. Transv. and obi. striai 25 in 0,oi mm. 



Marine: Coast of Northumberland (Grun.). 



Var. fossilis Brun. (1891). — Similar to var. cornuta. L. 0,2; B. 0,015 mm. Transv. and 

 obi. striai ^V^^ in 0,oi mm. — Per. p. 13 PL V f. 19. 



Marine: Japan, fossil (Brun.). 



15. P. (lelicatuluin W. Sm. (1852) — V. narrow lanceolate, slightly sigmoid, gradually ta- 

 pering from the middle to the acute ends. L. 0,i5, to 0,28; B. 0,o2 to O.03 mm. Median line 



