I 



KONGL. SV. VET. AKADEMIKNS IIANDLINGAK. BAM) 27. N:() 3. 171 



Var. baldjikiana (tRUN. (1888). — Ji. 0,or)r); B. 0,04 nun. Upper V. with naiTow axial area. 

 Functa (al)out (5 in 0,oi mm.) arranged in slightly radiate stria; and curved k^ngitudinal rows. 

 The strifu end at the margin in triangular, finely punctate spaces. Lower V. with 7 finely punc- 

 tate striiC in 0,01 mm., becoming fainter towards the mediau line. — Bot. Centrb. 1888 p. 824. 

 V. H. T. N:o 540 C. Morrisn W. Sm. Q. J. M. S. V p. 8 (ISo?)? (J. Haraclcu£ Pant. Ill PI. XXIV 

 f. 3(i8 (1893)? C. Pethoi Pant. Ill PI. XXXVI f. .504 (1893). C baldjikiana A. S. Atl. CXC 

 f. 7 to 10. 



Marine: Baltjik, foss. ! 



Var. Raeana Pant. (1889). -- L. 0,o4 8; B. 0,o:!t). Upper V. with somewhat broader axial 

 area and larger marginal alveoli than in Var. baldjikiana, otherwise similar. — ('. liacana Pant. 

 II p. .59 PI. XXIV f. 354. 



Marine: Hungary, fossil! 



Var.? dubia GrRUN. (1884). — L. 0,oi8 to 0,o3; B. 0,012 to 0,02;! mm. Strire 8 to 11 inO,(ii 

 mm. Puncta in the lower V. 14, in tlie upper 10 in 0,oi mm. Lower V. withoxit marginal rim. 

 — Franz Josefs Land I), p. 55. 



Marine: )Tafel Suimpe- (Grun.). 



Var. californica GtRUN. (1878). L. 0,02 to 0,027; B. 0,oi5 to 0,oi6 mm. Ujiper V. with 

 narrow axial area. Puncta 13 in O.oi mm., arranged in equidistant longitudinal and transverse 

 rows, the latter interrupted by a broad, marginal area. Lower V. with distinct marginal line. 

 StritB 11 in O.oi ram. finely punctate, radiate. — C. ambigua vur. calif. (xRUN. in CI. M. D. N:o 70. 

 V. H. Syn. PI. XXX f. 8, 9. A. S. Atl. CXCI, 40 to 43. 



Marine: California! 



Var. doljcHsis Pant. (1886). — L. 0,o4 to 0,08; B. 0,o4 to 0,o.t9 mm. Upper V. with narrow 

 axial area. Puncta arranged in somewhat undulating longitudinal rows and transverse striai, 7 

 (at the margin) or 12 (at the area) in 0,oi mm., ending in elongated triangular, finely jiunctate 

 alveoli. — Pant. I p. 32 PI. XVIII f. 161. 



Marine: Hungary, fossil (Pant.). 



Var. maxima GtRUN. (1863). — L. 0,o4 to 0,09; B. 0,033 to 0,055 mm. Upper V. with more 

 or less broad, linear axial area. Puncta coarse, arranged in more or less undulating longitudinal 

 and transverse rows, the latter aboxit 6 in 0,oi mm., composed of 3 to 5 puncta and ending in 

 punctate alveoli, which form a broad marginal band, frequently separated by a furrow from the 

 stripe. Lower V. thin, with a loculiferoiis rim (loculi 3 in 0,oi mm.). Strice about 11 in 0,oi 

 mm. finely punctate. — Mastoyloia maxima GtRUN. Verb. 1863 PL IV f. 1 (lower valve). C Scut. 

 var. fossilis Pant. II p. 59 PI. XXIV f. 353; 1890 (upper valve). C. Lorcnsiana A. S. Atl. CXCI 

 f. 28 to 34. 



Marine: Black Sea! Adriatic! Galapagos Islands! Hungary, fossil (Pant.). 



Cocconeis Scutellum is extremely variable and comprises a number of very different forms, 

 which I, however, am not inclined to separate as distinct species. Many insufficiently described 

 or figured species of Cocconeis and RhapJionn.s are probably mere varieties of C. ScHtellum, as 

 (J. Porta O'Meara (T. M. J. VII PI. VII f. 7; 1867), C. Grantiana Grev. (T. M. S. N. S. IX p. 72 

 PI. VIII f. 18), C. ornata Greg. (D. of Clyde p. 491 PI. IX f. 24), C. Grunoivii Pant. (II p. 58 

 PI. XXV f. 364; 1889), RhapJioneis Joncsii O'Meara (M. J. N. S. Vol. VII PI. VII f. 10), Rhaplio- 

 neis Moorii O'Meara (M. J. N. S. Vol. VII f. 11). Navicula AUmaniana Greg. (D. of Clyde p. 488 

 PI. IX f. 21) and C. crebrestriata (Grev. M. J. V. p. 9 PI. Ill f, 2 ; 1857) (both perhaps Orthoneis 

 fimbriafa), (J. borijana Pant. Ill PI. II f. 33 (1893) and C. californica var. hungarica Pant. Ill 

 1*1. X f. 164 (1893). Cocco)ms {ambigua var.'^) californica Grun. appears certainly to be a form 

 of C. Scutellum, but 0. californica var. melinitica Pant. (II p. 58 PI. IV f. 71 PL VII f. 123) repre- 

 sents upper valves, which are much too finely punctate for that species. C. ambigua Grun. (Novara 

 p. 14 PL I f. 9, 22) is doubtful. The fig. 22 appears to represent the nj)per valve of C. pellucida. 



