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



Var. euglypta Ehb. (1854). — L. O.oae; B. 0,oi7 mm. Striee of tlie upper valve crossed by 

 4 to 5 longitudinal, blank bands. Strise of the lower valve 19 in 0,oi mm. — C. eugl. Ehb. M. 

 G. XXXIV A. f. 2. V. H. Syn. XXX f. 33, 34. Grun. Franz Josefs Land Diat. Pl. I f. 3. 



Fresb water: Franz Josefs Land (Grun.), Belgium (V. H.), Mexico! Tasmania! Australia 

 (Daintree River)! 



4. C. Scutelluin Ehb. (1838). — Outline broadly elliptical. Upper V. with coarse puncta 

 arranged in transverse rows, iisually ending at the margin in an elongated or triangulär, finely 

 punctate space, and in longitudinal, usually straight and eqnidistant, rows. Lower V. delicate 

 with a marginal, frequently loculiferous, rim or line. Median line straight. Central nodule 

 rounded or stauroid. Strise radiate, becoming obsolete towards the median line, finely punctate. 



Var. genuina Cl. — L. 0, 045 to o,06; B. O, os to 0, 04 mm. Upper V with narrow, linear 

 axial area. Puncta 7 to 8 in 0, 01 mm. forming, slightly radiate, transverse and almost equidistant, 

 straight longitudinal rows. Transverse strise ending at the margin with larger, finely punctate 

 alveoli. Lower V. with a rim of obsolete loculi. Central area rounded, small. Striee 8 to 9 in 

 0,01 mm. radiate, finely punctate. — C. Scutellum Ehb. Inf. 194 Pl. XIV f. 8. W. Sm. B. D. I 

 p. 22 Pl. Ill f. 34. V. H. Syn. p. 132 Pl. XXIX f. 1 to 3. A. S. Atl. CXC, 17 to 20. C. Seut. 

 var. gemmata A. S. Atl. CXC, 23, 24; var. dilatata A. S. 1. c. 25, 26. 



Marine: Arctic America! Sjiitsbergen ! Finmark! Sea of Kära! East Cape; Behrings Island! 

 Baltic! Caspian Sea (Grun.), North Sea! Mediterranean ! Adriatic! Black Sea! Japan! South An- 

 stralia! Magelians Straits! California! 



Var. ininutissima Grun. (1881). — L. 0,oo8; B. 0,oo6 mm. Rows of puncta about 17 in 0,oi 

 mm. Marginal alveoli not larger than the puncta. Axial area narrow. — V. H. Syn. Pl. XXIX 

 f. 12. Grun. Franz Josefs Land D. p. 55 Pl. I f. 1. 



Marine: Franz Josefs Land (Grun.). 



Var. parva Grun. (1881). — L. 0,oi8 to 0,02; B. 0,oi to 0,017 mm. Upper V. with 11 rows 

 of puncta in 0, 01 mm. Marginal puncta elongated. Axial area narrow. — V. H. Syn. Pl. XXIX 

 f. 8, 9. C. consociata and C. aggregafa Kutz. according to Grun. C. transversalis Greg. M. J. III 

 p. 39 Pl. IV f. 7; 1854? G. Sciit. var. minor A. S. Atl. CXC, 22. 



Marine: Baltic! East Cape! Adriatic (Atl.). 



Var. stauroneiforniis W. Sm. (1853). — L. 0,022; B. O, o 1.3 to 0,oi8 mm. Upper valve with 

 narrow axial area. Marginal puncta not larger than the others. Transverse and straight longitu- 

 dinal rows of puncta 10 in 0, 01 mm. Lower V. central area dilated into a transverse fascia. — 

 B. D. I Pl. XXX f. 24 (i. V. H. Syn. Pl. XXIX f. 10, 11. C. paniforniis A. S. Atl. CLXXXIX 

 16, 21 (1894). 



Marine: Arctic America! Spitsbergen! Finmark! East Cape! North Sea! Mediterranean Sea 

 (Peragallo), New Zealand (Grun.), England (W. Sm.). 



Var. ninp)liata Grun. (1881). — L. OjCi; B. 0, 04 mm, Upper V. with somewhat broad axial 

 area, large marginal alveoli and 5 to 6 puncta iu 0, 01 mm, arranged in equidistant transverse and 

 longitudinal rows. Lower V. with distinct marginal area. Strite 6,.') in 0, 01 mm., becoming fain ter 

 towards the axial area, strongiy radiate. — V. H. Syn. XXIX f. 4. G. aäjunc.ta A. S. Atl. 

 CXC, 15, 16? 



Marine: Kerguelens Land! 



Var. ornuta Grun. (1867). — L. 0,o.s7 to 0,047; B. 0,o26 to 0,033 mm. Upper V. \yith 

 iiarj'ow axial area. Puncta 5 to (5 in 0, 01 mm., arranged in i"adiate transverse, and curved 

 longitudinal, rows. The transverse strite end at the margin in double rows of small puncta. 

 Lower V. with a loculiferous rim. Strife slightly radiate and finely punctate, 10 in 0, 01 mm. — 

 Novara ]i. 12. V. H. Syn. Pl. XXIX f. 6, 7. Mhaphoneis marginatn Grun. Verh. 1862 p. 383 

 Pl IV f. 13. 



Mari)ie: Kamtschatka and North Pacific Ocean (Grun,). 



