KONGL. SV. VET. AKADEMIENS HANDLINGAH. BAND 26. N:o 2. 163 



Striff 9 or 11 (middle) to 12 (ends) in ((,oi mm. slightly radiate, especially near the ends, punctate; 

 puncta about 22 in (),(ii mm. — Cocc. lepf. Ehb. Am. PI. 1: 2 f. 30. (hj. Icptoc. V. H. Syn. p. ()2 

 PI. 11 f. 18. Ill t'. 24 (!'. curta) Suppl. A. t'. 2 (f. elongata). C)j. hiingarica Pant. 11 p. 40 PI. 1 

 f. U (1880)? 



Fresh water: Rostock (toss.). Belgium! Hungary t'o.ss. (Pant.)? Mexico, foss.! 



Var. minor (-iKrN. (1882). — L. (>,()2fi; B. O.oot mm. — (tRUN. Foss. D. Osterr. Ung. p. 142 



Pi. XXIX f. ;52. 



Fresh water: Hungary, fossil ((4run.). 



Var. (ui(/i(sffi. (tRix. (1882). — L. '1,024 to 0.04; B. 0,oo5 to O.oi mm. Strisp 12 to 15 in 

 0.0 1 mm. C^RUN. Fo.sy. D. (isterr. Ung. p. 142 PI. XXIX f. 33, 34. 



Fresh water: Greenland! Hungary, fossil ((Trun.), (Teneva! Savoy! 



Var. c.rrisa Pet. (1877). — Ventral margin indented in the middle. — ('. turgida var. excisa'P'Kl. 

 Bull. Soc. Bot. de France 1877 PI. 1 f. 2. A. S. Atl. LXXl t. 35. (tRUK. Foss. D. Osterr. Ung. p. 142. 



Fresh water: Marly, near Paris (according to (Trunow). 



The most marked characteristic of C lepfoc( ros is the distinct axial area, which seems to 

 become much reduced in some of the varieties, named by Grunow, especially in the var. excisa 

 which 1 have placed here on the authority of Grunow. Specimens of that var. from Marly (CI. M. 

 D. X^:o 195) agree in my opinion with C fionidula Grin. 



The following forms, found in a fossil state in Hungary and described by Pantocsek seem 

 to be nearly akin to C. Ivpfoccrns. 



C. kaniensis Pant. (II p. 40 PI. XI f. 18(i). — L. 0,02.5; B. 0, 007.5 mm. Stria< 15 in 0,oi ram. 



C. Neupaueri Pant. (II p. 40 PI. XI f. 187). — L. 0,027; B. 0,009.5 mm. Stripe 15 in 0,oi mm. 



Specimens from (iryongios-Pata, which I have examined, are scarcely distinguishable from 

 C. Icjifoceros in Van Heurck's Types. 



15. ('. aiistriaoa Grun. (1875). — V. asymmetrical; with arcuate dorsal margin and slightly 

 convex ventral mai'gin. Ends obtuse and rounded. L. 0,o4 5 to 0,068; B. 0,oi2 to 0,oi7 mm 

 Median line somewhat excentric, nearly .straight, broad (oblique). Axial area distinct, linear, not 

 widened in the middle. Stride 11 or 13 (dorsal) to 13 or 14 (ventral) in 0,oi mm., radiate through- 

 out, punctate; puncta about 21 in 0,oi mm. — Grun. in A. S. Atl. IX f. 10, LXXI f. 67 to 69. 



Fresh Waaler: Tyrol (Atl.), Switzerland (St. Gingolf, Engadine)! 



Var. prisca (tRUN. (1882). — L. 0,o5 to 0,o78; B. 0,01.3 to 0,oi9 mm. Median line slightly 

 arcuate. Area slightly dilated on the dorsal side of the central nodule. Stria^ 9 (middle) to 11 

 (ends) in O.oi mm., punctate. Puncta 23 in 0,oi mm. — Grun. Foss. 1). Osterr. Ung. p. 143 

 PI. XXIX f. 29. 



Fresh water: Hungary, fossil ((Trun.). 



Var. excisa (tRUN. (1882). — Smaller. Ventral margin indented. — Grun. Foss. D. Osterr. 

 Ung. PI. XXIX f. 27. Pant. Ill PI. 1 f. 1 1 . 



Fresh water: Hungary, fossil ((Trun.). 



C an.'itriard, which seems to inhabit the alps only, is characterized by its median line, being 

 oblique and therefore broad in the middle between the central and terminal nodules, by its dis- 

 tinctly punctate striae and non-rostrate ends. It is evidently akin to C. leptocuros. Cyinh. Erdohen- 

 yana Pant. (II p. 40 PI. XI f. 198; 1889) agrees completely with C. au.striaca, as I have convinced 

 myself by examining specimens from Erdobenye. 



16. C. Stodderi C'l. (1881). — V. slightly asymmetrical, narrow, lanceolate, with subrostrate 

 ends. L. 0,07.5 to 0,09; B. 0,oi5 mm. Median line almost central, straight; its terminal tissures 

 approximate to the ends. Axial area moderately broad, linear-lanceolate, not abruptly dilated 

 around the central nodule. Strijp, strongly radiate in the middle, 10 or 11 (middle) to 12 (ends) 

 in 0,01 mm., not distinctly punctate. -- Cl. N. R. B. p. 5 PL I f. 5. Cl. M. D. N:o 212, 274. 



Fresh water: Monmouth (Maine), Bemis Lake (White Mountains)! Caldas (Brazil)! 



