44 P. T. CLEVE, SYNOPSIS OP" THE NAVICCLOID IM ATOMS. 



42. P. (Dunkiiiiii) cariiiiitum Donk. (1858). — V. very convex, unilaterally tapering- from 

 tbe middle to the acute eiid.s. L. U, i to 0, 13; B. Oui to 0,oi3 ram. Mediau liiie almost diagonal in 

 the middle and tlien closely following tlie convex margins. Transv. and obl. strise 'Yis- '"An ^^ 

 0,01 mm. — Donk. T. M. S. VI p. 23 Pl. III f. 5. Bonldnia var. Ralf in Pritr-h. Inf. p.'r)21 

 (1861). Per. IX f. 6. 



Marine: Sea of Kära! Davis Strait! North Sea! Balearic Islands! Japan, fossil (Brun coll.)I 



■ 43. P. specioSTiiu W. Sm. (1852). — V. linear, with nnilaterally rounded ends. L. O.ig to 

 0,27; B. 0,023 to 0,025 mm. Median line strongly excentric towards the ends. Trans\-. and obl. 

 strice 'V,e, i»/w, ="/,„ -»/,3, 2"/,, in 0,oi mm. — W. Sm. Ann. Mag. N. H. [2] IX p. 6 Pl. I f 3. 

 B. D. I p. 63 Pl. XX f. 197. Per. II f. 13 to 16. 



Marine: North Sea! Mediterranean Sea! Red Sea! Java! Sumatra! Labuau! (.'bina! Port 

 Jackson! Barbados! 



Var. gracilis Per. (isOl). — More narrow. L. 0,215; B. 0,oi5 mm. Transv. and obl. stri;e -"/, q 

 in 0,01 mm. Per p. 6 Pl. II f. 19. 



Marine: Sumati'a (Per.). 



Var.? Javanica Per. (1891). — L. 0, 07; B. 0,o2 to 0,23 mm. Transv. and obl. stri» -",,9 in 

 0,01 mm. — Per. p. 6 Pl. II f. 17, 18. 



Marine: Java, Sumatra (Per.). 



Var.? uintpia Per. (1891). — Same as var. javanica, but with obliqiiely truncate ends. — Per. 



p. 6, Pl. n f. 11. 



Marine: Java, Sumatra (Per.). 



Var. mediterranea Grun. (1880). — Linear, with nnilaterally rounded ends. L. 0,21 to 0,32; 

 B. 0,0 18 to 0,0 2 6 mm. Median line strongly excentric, coincident for a considerable distance with 

 the convex margin. Transv. and obl. strise. '^'^13.51 ''-'ui 'Vu iii O'"' m™- — F. ohscuruni var. »icdit. 

 Grun. A. D. p. 49. Per. II f 5. 



Marine: Mediterranean Sea! Seychelles (Grun.), Java! 



Var. pidchra Grun. (1860). — V. and median line as in var. medit. L. 0,3 to 0,6 ; B. 0,023 

 to 0,04 mm. Transv. and obl. strige. •■Vio^ "/u, 'Vu' '^'"■' i^^ ^1"' ™™- ~ ^- pulchr. Grun. Verh. 

 1860 p. 556 Pl. VI f. 2. Per. I f. 8. 



Marine: North Sea! Red Sea (Grun.), Java! Sumatra! 



Var.? forfuosa Cl. (1881). — V. lanceolate, slightly sigmoid, with nnilaterally rounded ends. 

 L. 0,07 6; B. 0,012 to 0,01:) mm. Median line strongly sigmoid and ver}^ excentric. Transv. and 

 obl. striee -V.o in 0,oi mm. ~ P. iorf. Cl. N. R. D. p. 5 Pl. I f. 6. Per. II f. 12. 



Marine: Balearic Islands! 



44. P. inajus Grun. (1880). — V. lanceolate, gradually tapering from the middle to the 

 obtuse ends, slightly sigmoid. L. 0,2 to 0,4; B. 0,024 to 0,0.52 mm. Metlian line nearly straight 

 in the middle, excentric towards the ends. Oblique strite form in the middle of the valve an ob- 

 tnser angle than on other parts of the valve. Transv. and obl. stritC '■'■^13.5 (Grun.) ";,3- 'Im 

 '7i.i' ""/is "1 0'^" "^™- — ^^- speciosmn var.? major Grun. A. D p. 49. F. affme var. interruptum 

 Per. Pl. IV f. 1 to 3. Fl. majus Icon. n. Pl. IV f. 15. 



Marine: Mediterranean Sea! Sumatra! 



45. P. Heros Cl. N. Sp. — V. lanceolate. slightly sigmoid, gradually tapering from the 

 middle to the obtuse ends. L. 0,4; B. O, oss mm. Median line straight, somewhat excentric towards 

 the ends. Transv. and obl. stritti 'V,,, in 0, 01 mm. — Pl. IV f. 20. 



Marine: Macassar Straits (Grove's Coll.)! 



This form is closely allied to F. majus, being somewhat broatler. The striie are coarser and 

 in the same direction in the middle as elsewhere. It is also nearly akin to F. foriiiosuiii. r. Io»(/is- 

 sima, which is more sigmoid and has a more excentric median line. 



