KONGL. SV. VET. AKADEMIENS ITANDLINGAT!. BAND 26. N:C) 2. 177 



mm. a little closer towards the ends, where they are strongly radiate, distinctly punctate; puiicta 

 15 in 0,0 1 mm. 



Fresh water: Oregon, fossil! 



63. C. mexicana Eub. (1844). — V. lunate with rounded trnncate ends. L. 0,09 to 0,i4; 

 B. 0,026 to 0,036 mm. Median line bent, witli reflexed terminal fissures. Axial area narrow 

 linear, central small, orbicnlar. Stigma in the middle of the central nodnle, witlioiit distinct iissure. 

 Strite 7 (middle) to 9 (ends) in 0,oi mm. radiate in the middle and alternately longer and shorter, 

 nearly parallel at the ends, coarsely punctate. Puncta 12 to 13 in 0,oi mm. — Coccon. mexicanum 

 Ehb. Ber. 1844 p. 342. A. S. Atl. X f. 32, 33; LXXI f. 82. Oymh. hamtscMtica Grun. in A. S. 

 Atl. X f. 31. 



Fresh water: Washington Territory! Vancouver Island! Mexico, Californa and Guatemala 

 fossil! Kamtschatka! 



There is, so far I can see, no other difference between C. mexicana and C. hanitsrhafica 

 than that the latter is somewhat smaller and has rather closer strise and puncta. 



64. C. Janischii A. S. (1881). — V. lunate, with rounded ends. L. 0,2; B. O, or, mm. 

 Median line arcuate, with strong terminal nodules and reflexed terminal fissures. Axial area 

 narrow, linear, slightly dilated around the central nodnle. Stigma in the middle of the central 

 nodule, without distinct fissure. Strite 8 to 9 in 0, 01 mm., in the middle radiate and of unequal 

 length, towards the ends almost transverse, distinctly punctate; puncta 10 to 12 in 0, 01 mm. — 

 Cocc. Jan. A. S. Atl. LXXI f. 81. 



Freiäh water: Pitt River, Oregon (Grove CoU.)! San Francisco (Atl.). 



Additional. 



C. conifera Brun (1893). — V. slightly asymmetrical, with arcuate dorsal and gibbous 

 ventral margin. Ends apiculate. L. 0, 04 to 0,05; B. 0,012 to 0,oi8 mm. Median line slightly 

 arcuate, somewhat excenti'ic. Axial area narrow, linear, not dilated aroi;nd the central nodule. 

 Strise 9 to 10 in 0, 01 mm., slightly radiate throughoiit, coarsely punctate; puncta 20 in 0, 01 mm. 

 — Hérib. D. d'Auvergne p. 220 Pl. VI f. 7. 



Fre.sh water: Cantal, fossil! 



Species not äescrihed and foo imperfectly figured to be admitted in the ahove monograph. 



C. affi.nis Pant. III Pl. IV f 52. 



C. austriaca var. fossilis Pant. III Pl. VIII f. 133. 



— — var. latestriata Pant. III Pl. I f. 9. 



C. Budayiana Pant. III Pl. XV f. 233 (C. Ehrenbergii var.?). 



_ _ var. gracilior Pant. III Pl. XXIV f. 363. 

 C. capitata Pant. III Pl. X f. 160. 



C. Cistula var. hungarica Pant. III Pl. III f. 40 (C. helvetica?). 

 C. dementis Pant. IH Pl. XX f. 303 (C. Cistula var.?). 

 C. cymbiformis Pant. III Pl. X f 174. 



— — var. producta Pant. III Pl. XXIII f. 346. 

 C. Grunovii Pant. III Pl. XIX f. 283 (C. Cistula var.?). 

 C. helvetica var. fossilis Pant. III Pl. IX f. 158. 



C. infläta Pant. III Pl. VI f. 95. 



C. Jimboi Pant. III Pl. VIII f. 130 (C. Cistula?). 



C. Kochii Pant. III Pl. I f . 2 (C. Cistula var. maculata?). 



K. Sv. Vet. Akad. Hand. BaDd 26. N:o 2. 23 



