178 1'. T. CLEVE, SYNOPSIS OF THE NAViCtJLOII) DlATOMS. 



A. somewhat similar, but mucli STnaller, valve is C. Kinkeri Pant. (III Pl. II f. 30; 1893) 

 too imperfectly known to be placed in the system. 



14. C. pellucida Hantzsch (1862). — Broadly elliptical. L. 0,o3 to 0,i ; B. 0,o2 to 0,o7 mm. 

 Uppei' V. witli ratlier broad linear, and straight axial area, on both sides of which are about 5 

 loiigitiidinal parallel rows of short strige, 30 in 0,oi mm. Lower V. with a marginal line and 

 straight median line, ending at a distance from the margin in lunate terminal areas. Terminal 

 fissnres in contrary directions. Strias 21 in 0,oi mm., slightly radiate, finely pnnctate. — Ostind. 

 Archip. D. p. 21 f. 11. Grun. Novara p. 12. Witt a. Truan Jeremie D. p. 15 Pl. IV f. 11 

 (f. 12. 20, 21 varieties with less numerous furrows) A. S. Atl. CXCIV f. 2; CXCV f. 1 to 6. 

 C. oceanica Ehb. Pritch. Inf. Pl. XII f. 42? C. notahilis Pant. III Pl. XXXV f. 492 (1893). 

 C, circumcinda A. S. Atl. CXCV f. 7 to 9 (1894). 



I, Marine: Nicobar Islands (Grun.), Java! Sumatra! Singapore! Sandwich Islands! Behrings 

 Island! Madagascar! New Zealand (Grun.). Fossil: Nankoori (Grun.), Hungary (Pant.), Hayti (Witt). 



Var. minor Grun. (1867). — L. 0,oi9 to 0,oa] B. 0,oi3 to 0,o.3 mm. Upper V. with about 

 4 strong furrows on each side of the axial area. Lower V. with straight, or slightly sigmoid 

 median line, reaching almost to the margin. Striee 20 in 0,oi mm. — Novara p. 13 Pl. I f. 7. 

 U. lineata Ehb. M. G. VI, 1, 40. 



Marine: Hed Sea! S:t Pauls Island (Grun.), Cape Good Hope (Grun.), Nicobar Islands (Grun.), 

 New Zealand (Grun.), Trinidad! 



Var. nanlcoorensis Grun. (1867). — L. 0,o.')5 to 0, 12; B. 0,o45 to 0,o9 mm. Upper V. with 

 about four furrows on each side of the area. Strise 11 to 14 in 0, 01 mm. — Novara p. 98. A. S. 

 Atl. CXCIV f. 15. G. pell. var. fossilis Pant. III Pl. XXXII f. 465 (1893). C. LunyacseJcii 

 Pant. III Pl. XLI f. 564 (1893). 



15. C. pseudomavgiuata Greg. (1857). — Elliptical. L. O, oss to 0,o84; B. 0,026 to 0,07 6 

 mm. Upper V. with narrow, lanceolate axial area and on each side of it lunate depressions. 

 Strite 16 to 24 in 0, 01 mm., punctate. Lower V. with straight median line, ending at some dis- 

 tance from the margin in small, lunate terminal areas. Axial area narroAv, central small orbi- 

 cular. Stri.ie 20 to 24 in 0,oi mm. radiate, pnnctate. — D. of Clyde p. 492 Pl. IX f. 27 (entire 

 frustnle) Pritch. Inf. Pl. VII f. 39. V. H. Syn. XXIX f. 20, 21. A. S. Atl. CXCIV, 5 to 7. 

 C. major Greg. D. of Clyde Pl. IX f. 28 (lower V.). C. pellucida Grun. Verh. 1863 p. 145 

 Pl. IV f. 6. C. Kircheni')aiieriana Jan. and Rabh. D. of Honduras p. 7 Pl. I f. 9? C. Henrioti 

 Pet. D. de Cape Horn p. 117 Pl. X f. 7 (1888)? 



Marine: Greenland! Spitsbergen! Sea of Kära! North Sea! Mediterranean ! Red Sea! Sey- 

 chelles! Madagascar! China! Galapagos Islands! Sandwich Islands! Honduras (Rabh.), Hi^ngary, 

 fossil (Pant.). 



Var. intermedia Grun. (1867). — L. O, os to 0,or. ; B. 0, 04 to 0, 045 mm. Lower V. witli slightly 

 sigmoid median line. Striiie 20 in 0,oi mm. — Novara p. 13 Pl. I f. (!. C. duplex A. S. Atl. CXCIV, i. 



Marine: Corsica! Cape Good Hope (Grun.). Nicobar Islands (Grun.), Pliilippines (Grun.), 

 Sandwich Islands! Tahiti (Grun.), Japan! 



16. C. lieteroidea Hantzsch (1862). — Broadly elliptical to almost orbicnlar. L. 0,o3r> to 

 0,07; B. 0,o2.T to O, or, 5 mm. Upper V. with broadly linear, more or less distinctly sigmoid, or 

 oblique axial area, on both sides of which are 3 to 5 arcnate furrows. Stri;e 25 in 0, 01 mm. 

 Lower V. with sigmoid median line, not reaching to the margin. Axial area narrow, central area 

 small, frequently transversely dilated into a narrow fascia. Sti'iéu 18 to ii in 0, 01 mm. radiate. 

 Terminal areas lunate, fi'e(|ucntly prolonged into a line parallel to the margin of the valve. 

 — Ostind. Arch. D. p. 21 f. ](l. Grun. Novara p. 12. A. S. Atl. CXCVI f. 2, 33 to 37, 40, 41. 

 ('■. hiuata Lkud. Fortm. \). de Ceylon i'l. I f. 3. C. recurva A. S. Atl. CXCVI 31, 32 (1894). 

 C. tenell((^ A. S. 1. c. f. 38. C. frnnsversa A, S. 1. c. f. 39. 



